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Florida State University
1.
Ingrole, Aniket.
Dielectric and Mechanical Properties of PMMA/BTA Nanocomposites for HTS Applications.
Degree: MS, Industrial and Manufacturing Engineering, 2010, Florida State University
URL: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3865 
;
► To prepare dielectric materials for High Temperature Superconductor (HTS) cables, nanocomposites consisting of Polymethylmethacrylate (PMMA) and Barium Titanate (BTA) nanoparticles have been manufactured and evaluated.…
(more)
▼ To prepare dielectric materials for High Temperature Superconductor (HTS) cables, nanocomposites consisting of Polymethylmethacrylate (PMMA) and Barium Titanate (BTA) nanoparticles have been manufactured and evaluated. The main objective of this research is to enhance the dielectric breakdown strength and reduce the dielectric losses of the nanocomposites. Polymethylmethacrylate (PMMA) with the addition of BTA (5wt.% and 10wt.% ) nanocomposites were fabricated by using two different methods. The breakdown voltage measurements have been conducted under AC, DC and lightning impulse high voltage. The measurements were conducted at both room temperature (293 K) and liquid nitrogen temperature (77 K). The results of the electrical breakdown field measurements of the nanocomposites are compared with those of the base polymer. Fracture surface analysis was carried out with SEM analysis. The difference in the breakdown area due to different modes of voltages applied and effect of the nanoparticles was studied. Mechanical characterization of the resultant nanocomposites was also carried out at both the room temperature (293K) and at cryogenic temperature (77K). The effects of nanoparticles on the electrical and mechanical properties were observed. A marginal increase in the dielectric strength of the nanocomposites was observed for AC conditions at both the temperatures. There was a decrease in the values of nanocomposites for impulse conditions. At cryogenic temperature nanocomposites showed higher dielectric strength when DC voltage was applied. For both the temperatures, dielectric losses increased as the voltage was increased for all the materials studied, except for PMMA/10wt.%BTA nanocomposites at cryogenic temperature, which showed decrease of losses by ~ 70%. An increase of ~12% in Young's modulus and ~ 65% increase in tensile strength of the nanocomposites were observed at cryogenic temperature. It also shows that more material damage was observed under AC breakdown voltage compared to the impulse and DC voltage breakdown cases. Also the material damage was more pronounced at 77 K than that at 293 K.
A Thesis submitted to the Department of Industrial and Manufacturing Engineering in partial fulfillment of the requirements
for the degree of Master of Science.
Summer Semester, 2010.
July 6, 2010.
Tan Delta Losses, Impulse Breakdown, DC Breakdown, AC Breakdown, Barium Titanate, Polymethylmethacrylate (PMMA), Cryogenic Insulation, High Temperature Superconductors (HTS), Nanodielectrics, Mechanical Breakdown, Surface Fracture Analysis, Weibull Plots
Zhiyong Richard Liang, Professor Directing Thesis; Horatio Rodrigo, Committee Member; Okenwa Okoli, Committee Member; Mei Zhang, Committee Member.
Advisors/Committee Members: Zhiyong Richard Liang (professor directing thesis), Horatio Rodrigo (committee member), Okenwa Okoli (committee member), Mei Zhang (committee member).
Subjects/Keywords: Manufacturing processes
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APA (6th Edition):
Ingrole, A. (2010). Dielectric and Mechanical Properties of PMMA/BTA Nanocomposites for HTS Applications. (Masters Thesis). Florida State University. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-3865 ;
Chicago Manual of Style (16th Edition):
Ingrole, Aniket. “Dielectric and Mechanical Properties of PMMA/BTA Nanocomposites for HTS Applications.” 2010. Masters Thesis, Florida State University. Accessed January 23, 2021.
http://purl.flvc.org/fsu/fd/FSU_migr_etd-3865 ;.
MLA Handbook (7th Edition):
Ingrole, Aniket. “Dielectric and Mechanical Properties of PMMA/BTA Nanocomposites for HTS Applications.” 2010. Web. 23 Jan 2021.
Vancouver:
Ingrole A. Dielectric and Mechanical Properties of PMMA/BTA Nanocomposites for HTS Applications. [Internet] [Masters thesis]. Florida State University; 2010. [cited 2021 Jan 23].
Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3865 ;.
Council of Science Editors:
Ingrole A. Dielectric and Mechanical Properties of PMMA/BTA Nanocomposites for HTS Applications. [Masters Thesis]. Florida State University; 2010. Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3865 ;
Oregon State University
2.
Garretson, Ian C.
A Unit Manufacturing Process Characterization Methodology and Supporting Terminology for Sustainable Manufacturing Assessment.
Degree: MS, Industrial Engineering, 2015, Oregon State University
URL: http://hdl.handle.net/1957/57191
► Manufacturing industry drives economic activity and growth around the world, but manufacturing activities consume large amounts of material, energy, and labor resources. Therefore, the impacts…
(more)
▼ Manufacturing industry drives economic activity and growth around the world, but
manufacturing activities consume large amounts of material, energy, and labor resources. Therefore, the impacts of
manufacturing need to be accounted for and reduced. Direct benefits of
manufacturing are products and income, which, in turn, influence the lives of people in the local community and the consumers purchasing the manufactured products. The design process for products and requisite
manufacturing facilities should incorporate environmental and social criteria in addition to economic criteria to more comprehensively assess sustainability performance. Sustainability assessments for manufactured products and
manufacturing facilities can be carried out by assessing the incremental elements of
manufacturing industry, which are unit
manufacturing processes (UMPs).
A challenge in the research area is that current methods for UMP assessment are ad hoc and the methods do not incorporate the system as a whole. The purpose of this research is to enable sustainable
manufacturing decision making by 1) unifying an assessment methodology for UMPs, 2) developing an information modeling framework for characterizing UMPs and workpieces, and 3) demonstrating UMP composability (connectivity) modeling for use in sustainability assessments. The methodology is developed through literature review, and unifies 23 different UMP
manufacturing assessment methods by analyzing each for overlapping and unique steps in the approaches. Thus, a nine-step assessment methodology emerged, which has multiple applications in industry, including process and facility assessment and improvement.
A next step for MPF modeling is to link UMP models by modeling the workpiece state, but supporting tools were need to identifying how to correctly model the interactions between the UMP and the workpiece. The information modeling framework developed herein provides the theoretical background for how UMP models interact by linking the function of the UMP to the effect on the workpiece and by identifying the calculation variables necessary to assess UMPs. The information modeling framework developed for composing UMP models is demonstrated through the energy analysis of a metal component. The component is manufactured by recrystallization annealing, reducing (milling), through hardening, and recovery annealing (tempering). Models are composed (connected) by utilizing knowledge of how UMPs impart transformation to the workpiece and the information embedded in the workpiece that is transported to subsequent UMPs. Workpiece information includes the geometry and properties of the current state and future states. Previous work reported in literature has focused on geometry modeling (e.g. CAD, CAM), while this work focuses on property modeling. This research develops an overarching detailed approach to
manufacturing sustainability assessments through in-depth analysis of UMPs. The result of using this UMP approach will provide guidance toward a more sustainable future.
Advisors/Committee Members: Haapala, Karl R. (advisor), Paul, Brian (committee member).
Subjects/Keywords: Unit Manufacturing Process; Manufacturing processes
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APA (6th Edition):
Garretson, I. C. (2015). A Unit Manufacturing Process Characterization Methodology and Supporting Terminology for Sustainable Manufacturing Assessment. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/57191
Chicago Manual of Style (16th Edition):
Garretson, Ian C. “A Unit Manufacturing Process Characterization Methodology and Supporting Terminology for Sustainable Manufacturing Assessment.” 2015. Masters Thesis, Oregon State University. Accessed January 23, 2021.
http://hdl.handle.net/1957/57191.
MLA Handbook (7th Edition):
Garretson, Ian C. “A Unit Manufacturing Process Characterization Methodology and Supporting Terminology for Sustainable Manufacturing Assessment.” 2015. Web. 23 Jan 2021.
Vancouver:
Garretson IC. A Unit Manufacturing Process Characterization Methodology and Supporting Terminology for Sustainable Manufacturing Assessment. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1957/57191.
Council of Science Editors:
Garretson IC. A Unit Manufacturing Process Characterization Methodology and Supporting Terminology for Sustainable Manufacturing Assessment. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/57191
Oregon State University
3.
Malshe, Harsha A.
A Techno-Economic Assessment Methodology for Advanced Additive and Joining Processes.
Degree: MS, Industrial Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59865
► Integrated manufacturing systems, a combination of subtractive, additive, and joining processes, provide a competitive advantage for manufacturing organizations. As product designs become more complex and…
(more)
▼ Integrated
manufacturing systems, a combination of subtractive, additive, and joining
processes, provide a competitive advantage for
manufacturing organizations. As product designs become more complex and capital more scarce, an ideal combination of advanced
manufacturing technologies (e.g., powder bed fusion or friction welding), in tandem with traditional subtractive
manufacturing systems, can optimize the production of high-value products. However, adoption of advanced additive and joining
processes (AAJPs) on a large-scale has been obstructed by technical and economic barriers. Techno-economic analysis is a tool that can help justify the large-scale implementation of integrated
manufacturing systems, and realization of potential cost and performance efficiencies. Consequently, a methodology has been developed to understand the impacts of competing
manufacturing decisions for AAJPs. The approach has been further developed and applied to a case study for aerospace applications. Major contributions include development of integrated process selection algorithms and cost analysis models. Results demonstrate the feasibility of this strategy to evaluate competing advanced
manufacturing technologies.
Advisors/Committee Members: Haapala, Karl R. (advisor), Campbell, Matthew I. (committee member).
Subjects/Keywords: Additive manufacturing; Manufacturing processes
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APA (6th Edition):
Malshe, H. A. (2016). A Techno-Economic Assessment Methodology for Advanced Additive and Joining Processes. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59865
Chicago Manual of Style (16th Edition):
Malshe, Harsha A. “A Techno-Economic Assessment Methodology for Advanced Additive and Joining Processes.” 2016. Masters Thesis, Oregon State University. Accessed January 23, 2021.
http://hdl.handle.net/1957/59865.
MLA Handbook (7th Edition):
Malshe, Harsha A. “A Techno-Economic Assessment Methodology for Advanced Additive and Joining Processes.” 2016. Web. 23 Jan 2021.
Vancouver:
Malshe HA. A Techno-Economic Assessment Methodology for Advanced Additive and Joining Processes. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1957/59865.
Council of Science Editors:
Malshe HA. A Techno-Economic Assessment Methodology for Advanced Additive and Joining Processes. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59865
Stellenbosch University
4.
Vogt, Christian.
An experimental cost model for composite parts using vacuum assisted resin transfer moulding (VARTM).
Degree: Mechanical and Mechatronic Engineering, 2011, Stellenbosch University
URL: http://hdl.handle.net/10019.1/6579
► Thesis (MScEng (Mechanical and Mechatronic Engineering)) – University of Stellenbosch, 2011.
ENGLISH ABSTRACT: Vacuum assisted resin transfer moulding (VARTM) belongs to the category of resin infusion…
(more)
▼ Thesis (MScEng (Mechanical and Mechatronic Engineering)) – University of Stellenbosch, 2011.
ENGLISH ABSTRACT: Vacuum assisted resin transfer moulding (VARTM) belongs to the category of resin infusion
techniques that use lower than atmospheric pressure to infiltrate a reinforced cavity. This
technique has various advantages; however, manufacturing costs can be relatively high due to
more difficult shapes fabricated and a lack of knowledge regarding cost driving factors.
The objective of this study was to develop a cost model for composite parts. Such a model
allows the estimation of manufacturing costs of shapes of different geometries. Therefore, it
provides a comparison to alternative manufacturing techniques, such as metal forming or
composite spray lay-up and helps to avoid unnecessarily expensive design features. The
proposal was made to split complex shaped composite parts into individual basic shapes,
which are further investigated here.
For the basic shapes, an experimental approach was used where the manufacturing times of
each process step are measured and then statistically analysed. Infusion simulation software
was used to obtain additional filling times to complete the design of experiments. This method
allows the estimation of manufacturing times of composite parts with different geometries.
The manufacturing times were validated to that of a complex shaped industrial part, with
reasonable results. Finally, a flexible cost model was developed to compare different
manufacturing techniques and to estimate the manufacturing costs.
AFRIKAANSE OPSOMMING: Vakuumgesteunde harsinspuitingsgietwerk (VARTM) behoort tot die kategorie
harsinspuitingstegnieke wat laer-as-atmosferiese druk gebruik om ʼn versterkte holte binne te
dring. Hierdie tegniek hou verskeie voordele in. Tog kan vervaardigingskoste betreklik hoog
wees wanneer dit by ingewikkelder vorms en ʼn gebrek aan kennis met betrekking tot
kostesnellers kom.
Die doelwit van hierdie studie was om ʼn kostemodel vir saamgestelde onderdele te ontwikkel.
Die model maak voorsiening vir die raming van die vervaardigingskoste vir verskillende
afmetings. Sodoende bied dit ʼn vergelyking met alternatiewe tegnieke, en help voorkom
onnodig duur ontwerpkenmerke. Daar is voorgestel dat dele met ingewikkelde vorms in
individuele basiese vorms verdeel word, wat dan hier verder ondersoek word.
Vir die basiese vorms word ʼn eksperimentele benadering gebruik waar die vervaardigingstye
in elke prosesstap gemeet en statisties ontleed word. Voorts word
inspuitingsimulasiesagteware gebruik om komplementêre inspuitingstye te bepaal ten einde
die eksperimentele ontwerp te voltooi. Hierdie metode maak dit ook moontlik om die
vervaardigingstye vir saamgestelde materiaal onderdele van verskillende afmetings te raam.
Die vervaardigingstye word dan bevestig aan die hand van dié van ʼn kompleks gevormde
industriële onderdeel, met redelike resultate. Uiteindelik word ʼn buigsame kostemodel
ontwikkel om verskillende vervaardigingstegnieke te vergelyk en die…
Advisors/Committee Members: Schreve, K., University of Stellenbosch. Faculty of Engineering. Dept. of Mechanical and Mechatronic Engineering..
Subjects/Keywords: Mechanical engineering; Manufacturing processes; Manufacturing processes – Costs
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APA (6th Edition):
Vogt, C. (2011). An experimental cost model for composite parts using vacuum assisted resin transfer moulding (VARTM). (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/6579
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Vogt, Christian. “An experimental cost model for composite parts using vacuum assisted resin transfer moulding (VARTM).” 2011. Thesis, Stellenbosch University. Accessed January 23, 2021.
http://hdl.handle.net/10019.1/6579.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Vogt, Christian. “An experimental cost model for composite parts using vacuum assisted resin transfer moulding (VARTM).” 2011. Web. 23 Jan 2021.
Vancouver:
Vogt C. An experimental cost model for composite parts using vacuum assisted resin transfer moulding (VARTM). [Internet] [Thesis]. Stellenbosch University; 2011. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10019.1/6579.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Vogt C. An experimental cost model for composite parts using vacuum assisted resin transfer moulding (VARTM). [Thesis]. Stellenbosch University; 2011. Available from: http://hdl.handle.net/10019.1/6579
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Nelson Mandela Metropolitan University
5.
Odendaal, Morné.
Wireless rotational process monitoring system.
Degree: MTech, Faculty of Engineering, the Built Environment and Information Technology, 2011, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/1347
► The manufacturing industry is constantly looking for ways to reduce production costs and at the same time to increase productivity. Automation of common manufacturing operations…
(more)
▼ The
manufacturing industry is constantly looking for ways to reduce production costs and at the same time to increase productivity. Automation of common
manufacturing operations is one of these methods. By automating common
manufacturing operations; various machines, robots, control systems and information technologies are used to reduce the overall human input requirement (mental and physical). Recent advances in technology have made it possible to now also automate (or facilitate) the maintenance requirement of these machines and tools. Modern tools and machines, which can estimate when it will fail or when failure is imminent have obvious advantages for predictive maintenance purposes. Another function of this technology is to determine how efficiently a tool or machine operates, or what the quality of the produced goods is. Predictive maintenance can decrease
manufacturing plant or machine down times – which have a positive effect on cost-savings – has gained considerable importance over the last two decades
Advisors/Committee Members: Van Niekerk, T I Dr, Kruger, G H Dr.
Subjects/Keywords: Manufacturing processes – Automation
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APA (6th Edition):
Odendaal, M. (2011). Wireless rotational process monitoring system. (Masters Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/1347
Chicago Manual of Style (16th Edition):
Odendaal, Morné. “Wireless rotational process monitoring system.” 2011. Masters Thesis, Nelson Mandela Metropolitan University. Accessed January 23, 2021.
http://hdl.handle.net/10948/1347.
MLA Handbook (7th Edition):
Odendaal, Morné. “Wireless rotational process monitoring system.” 2011. Web. 23 Jan 2021.
Vancouver:
Odendaal M. Wireless rotational process monitoring system. [Internet] [Masters thesis]. Nelson Mandela Metropolitan University; 2011. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10948/1347.
Council of Science Editors:
Odendaal M. Wireless rotational process monitoring system. [Masters Thesis]. Nelson Mandela Metropolitan University; 2011. Available from: http://hdl.handle.net/10948/1347
Florida State University
6.
Chen, Li-Jen.
Uncertainty Quantification for Buckypaper Polymer Composite Computer Simulation.
Degree: MS, Industrial and Manufacturing Engineering, 2010, Florida State University
URL: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3838
;
► Since the discovery of carbon nanotubes in 1991 alongside their superior performance in mechanical and electrical properties, carbon nanotubes have been widely considered to be…
(more)
▼ Since the discovery of carbon nanotubes in 1991 alongside their superior performance in mechanical and electrical properties, carbon nanotubes have been widely considered to be one of the most promising next generation materials. They have been frequently used in polymer composites due to their high strength-to-weight and modulus-to-weight ratios. Yet despite their promising qualities in manufacturing, carbon nanotube based composites still have many issues that need to be resolved before they can be used for industrial applications. In order to more cost effectively produce nanocomposites and improve their quality, it is necessary to accurately observe and understand the variations in their raw material properties. The variability of the raw material in nanotube based composites usually has a large impact on the properties of the eventual product. However, physical experimentation for the purpose of quantifying variability in nanomaterial properties is usually expensive and sometimes not feasible or accurate enough. This paper presents a constrained nonlinear programming approach for the quantification of raw material variability while also examining the impact of raw material variability on the properties of buckypaper polymer (BPP) composites. The proposed approach suggests conducting small physical experiments to collect data on raw material properties and final composite part properties before employing an inverse uncertainty propagation approach to estimate the parameters of the probability distribution of the material properties. Both univariate and multivariate probability distributions are considered. A case study based on data from a real buckypaper manufacturing process is used to illustrate the approach. It is shown that simultaneously modeling the material properties with a multivariate distribution improves the quality of the identified model.
A Thesis submitted to the Department of Industrial and Manufacturing Engineering in partial fulfillment of the requirements for the degree of Master of
Science.
Summer Semester, 2010.
June 11, 2010.
Uncertainty Quantification, Monte Carlo Simulation, Nonlinear Programming, Nanocomposites
Arda Vanli, Professor Directing Thesis; Joseph Pignatiello, Committee Member; Chad Zeng, Committee Member; Ben Wang, Committee Member; Chuck Zhang, Committee Member.
Advisors/Committee Members: Arda Vanli (professor directing thesis), Joseph Pignatiello (committee member), Chad Zeng (committee member), Ben Wang (committee member), Chuck Zhang (committee member).
Subjects/Keywords: Engineering; Manufacturing processes
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APA ·
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APA (6th Edition):
Chen, L. (2010). Uncertainty Quantification for Buckypaper Polymer Composite Computer Simulation. (Masters Thesis). Florida State University. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-3838 ;
Chicago Manual of Style (16th Edition):
Chen, Li-Jen. “Uncertainty Quantification for Buckypaper Polymer Composite Computer Simulation.” 2010. Masters Thesis, Florida State University. Accessed January 23, 2021.
http://purl.flvc.org/fsu/fd/FSU_migr_etd-3838 ;.
MLA Handbook (7th Edition):
Chen, Li-Jen. “Uncertainty Quantification for Buckypaper Polymer Composite Computer Simulation.” 2010. Web. 23 Jan 2021.
Vancouver:
Chen L. Uncertainty Quantification for Buckypaper Polymer Composite Computer Simulation. [Internet] [Masters thesis]. Florida State University; 2010. [cited 2021 Jan 23].
Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3838 ;.
Council of Science Editors:
Chen L. Uncertainty Quantification for Buckypaper Polymer Composite Computer Simulation. [Masters Thesis]. Florida State University; 2010. Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3838 ;
Florida State University
7.
Koo, Ana.
Short Carbon Nanotubes and Carbon Nanofibers Composites: Fabrication and Property Study.
Degree: MS, Industrial and Manufacturing Engineering, 2011, Florida State University
URL: http://purl.flvc.org/fsu/fd/FSU_migr_etd-2841
;
► Carbon nanotubes (CNTs) have drawn interest for many applications since their discovery. While they provide exceptional mechanical, physical and chemical properties, several technical barriers must…
(more)
▼ Carbon nanotubes (CNTs) have drawn interest for many applications since their discovery. While they provide exceptional mechanical, physical and chemical properties, several technical barriers must be overcome before these properties can be fully used. Some of such drawbacks concern length control, lack of good dispersion and poor interfacial bonding. Currently, CNTs such as single-walled carbon nanotubes (SWNTs) and multi-walled carbon nanotubes (MWNTs) and carbon nanofibers (CNFs) are produced in lengths ranging between several to hundreds micrometers and are usually bounded into macroscopically entangled networks. This contradicts with the requirements of some applications, which in the end will benefit with short and highly dispersed CNTs in lengths of a few hundred nanometers or less, such as drug delivering and energy storage carriers. Short CNTs (s-CNTs) and CNFs (s-CNFs) can enhance the mechanical properties of a composite due to the increased interaction with the polymer matrix, through the improvement of the interfacial bonding and resin encapsulation, which is possible with existing open ends of nanotubes. Ultimately this influences the matrix's properties by affecting its chain entanglements, morphology, and crystallinity in the nanocomposite. This research is a continuous effort on nanoscale cutting and characterization of s-CNTs and s-CNFs. Moreover, this research used s-MWNTs and s-CNFs in the lengths of 200 and 500 nm to manufacture the nanocomposites. The mechanical properties of the resultant nanocomposties were characterized. The interactions of the s-MWNT and s-CNTs with epoxy resin matrix were observed using high-resolution SEM and atomic-resolution TEM. The results were compared to nanocomposites with pristine MWNTs and CNFs. In the study, four case studies were explored: 1) 200 nm s-MWNT/epoxy composites; 2) 500 nm s-MWNTs/epoxy composites; 3) 200 nm s-CNF/epoxy composites; 4) 500 nm s-CNF/epoxy composites. For all four cases the MWNT and CNF concentrations were 0.05 wt%, 0.10 wt%, and 1.00 wt%, respectively. Significant mechanical improvements were observed. The strength of the s-MWNT nanocomposite at 1.00 wt% gave a 64% improvement compared to the control sample. The highest young's modulus was also obtained in the 1.00 wt% s-MWNT (200 nm) nanocomposite, and it showed an increase of 44%. In general, the most significant improvements were seen with the s-MWNTs (200 nm) nanocomposites due to their smaller diameters and shorter length. Glass transition temperature was also studied. Finally, the interfacial bonding and interactions of the nanotube's opened ends with the resin matrix were observed through HR-SEM and atomic-resolution TEM analysis, which validated the creation of MWNT and CNF opened ends and the actual resin encapsulation inside the nanotubes' hollow structures.
A Thesis submitted to the Department of Industrial and Manufacturing Engineering in partial fulfillment of the requirements
for the degree of Master of Science.
Summer Semester, 2011.
April 27,…
Advisors/Committee Members: Zhiyong Richard Liang (professor directing thesis), Tao Liu (committee member), Chun Chuck Zhang (committee member).
Subjects/Keywords: Engineering; Manufacturing processes
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APA ·
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Manager
APA (6th Edition):
Koo, A. (2011). Short Carbon Nanotubes and Carbon Nanofibers Composites: Fabrication and Property Study. (Masters Thesis). Florida State University. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-2841 ;
Chicago Manual of Style (16th Edition):
Koo, Ana. “Short Carbon Nanotubes and Carbon Nanofibers Composites: Fabrication and Property Study.” 2011. Masters Thesis, Florida State University. Accessed January 23, 2021.
http://purl.flvc.org/fsu/fd/FSU_migr_etd-2841 ;.
MLA Handbook (7th Edition):
Koo, Ana. “Short Carbon Nanotubes and Carbon Nanofibers Composites: Fabrication and Property Study.” 2011. Web. 23 Jan 2021.
Vancouver:
Koo A. Short Carbon Nanotubes and Carbon Nanofibers Composites: Fabrication and Property Study. [Internet] [Masters thesis]. Florida State University; 2011. [cited 2021 Jan 23].
Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-2841 ;.
Council of Science Editors:
Koo A. Short Carbon Nanotubes and Carbon Nanofibers Composites: Fabrication and Property Study. [Masters Thesis]. Florida State University; 2011. Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-2841 ;
Nelson Mandela Metropolitan University
8.
Roth, Benlloyd Koekemoer.
Enablers for lean process sustainability within South African manufacturing industries.
Degree: Faculty of Business and Economic Sciences, 2015, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/6591
► James Womack and his colleagues Daniel Jones and Daniel Roos changed the way western civilization approached manufacturing. In 1990, they published a book called ‘The…
(more)
▼ James Womack and his colleagues Daniel Jones and Daniel Roos changed the way western civilization approached manufacturing. In 1990, they published a book called ‘The Machine That Changed the World: The Story of Lean Production’. It was a concept that had slowly filtered from the east but had not made its mark on the manufacturing sector. The concept of lean, born out of the Japanese Toyota Manufacturing System, was first thought to be impossible to duplicate outside of Japan. Since Womack and company popularised this “new” way of producing goods and delivering services it spread across industries finding popularity in the medical, engineering, accounting and especially the manufacturing industries. Over the last few decades lean practices has been synonymous with efficiency, cost reduction, supply chain optimisation and innovative problem solving (Anvari Norzima, Rosnah, Hojjati and Ismail, 2010; Pieterse et al., 2010; Womack et al., 1990). Lean process implementation has been researched in abundance, as has failed attempts at lean implementation. The purpose of this study was to identify and assess enablers of lean sustainability in organisations where lean processes are already being implemented. The literature study found Organisational Culture, Leadership, Employee Engagement and Trade Unions participation as factors that contributed to successful lean implementations. The author developed a model to test Organisational Culture, Leadership, Employee Engagement and Trade Unions as enablers to sustain lean practices in organisations in South Africa’s manufacturing industries. The results proved that Organisational Culture, Leadership and Employee Engagement were considered enablers for lean sustainability. These three enablers have an interlinked relationship and together help sustainability. Lacking just one factor would surely result in unsustainable lean practices. The study was conducted in the quantitative paradigm, as the hypothesised relationship was statistically tested. The data was collected from a homogenous group via an email sent with a link to the questionnaire. The data was statistically analysed with Statistica software and Microsoft Excel.
Subjects/Keywords: Lean manufacturing; Manufacturing processes; Process control
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APA (6th Edition):
Roth, B. K. (2015). Enablers for lean process sustainability within South African manufacturing industries. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/6591
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Roth, Benlloyd Koekemoer. “Enablers for lean process sustainability within South African manufacturing industries.” 2015. Thesis, Nelson Mandela Metropolitan University. Accessed January 23, 2021.
http://hdl.handle.net/10948/6591.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Roth, Benlloyd Koekemoer. “Enablers for lean process sustainability within South African manufacturing industries.” 2015. Web. 23 Jan 2021.
Vancouver:
Roth BK. Enablers for lean process sustainability within South African manufacturing industries. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2015. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10948/6591.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Roth BK. Enablers for lean process sustainability within South African manufacturing industries. [Thesis]. Nelson Mandela Metropolitan University; 2015. Available from: http://hdl.handle.net/10948/6591
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
9.
Rafibakhsh, Nima.
Automated Assembly Planning : From CAD Model to Virtual Assembly Process.
Degree: PhD, Mechanical Engineering, 2017, Oregon State University
URL: http://hdl.handle.net/1957/60626
► Assembly planning is a crucial task for every manufacturing product. In general, assembly operations consume more than 30% of the total manufacturing time and cost.…
(more)
▼ Assembly planning is a crucial task for every
manufacturing product. In general, assembly operations consume more than 30% of the total
manufacturing time and cost. Therefore, any effort in optimizing assembly will have a significant impact on the economic success of
manufacturing. Finding an optimal assembly plan by hand is tedious and perhaps impractical for the large models. This research introduces an automatic computational tool in automated assembly planning (AAP) to automatically transform a CAD assembly into a set of assembly instructions. The goal is to make this transformation with as little user commitment as possible. Thus, automation is applied on every detail of the work. The work has five main divisions: geometric reasoning, complex geometry detection, graph representation, AI Planning and post–planning. To have the most general assembly planning tool, tessellation is considered as the representation of the input model. A revolutionary reasoning scheme is implemented to efficiently derive geometric and mating constraints from the tessellated models along with detection of complex geometries including fasteners, gears and springs. The mating information between assembly parts are stored in a liaison graph which is the starting point of an artificial intelligence planning procedure. Various graph–based algorithms are implemented to generate feasible assembly candidates. The AI planning evaluates every assembly candidate with complex statistical models and produces multiple instructions in terms of a detailed assembly tree or called Treequence. In the post–planning section, an optimization algorithm is applied on the generated treequence to find the optimal orientation of the subassemblies in the entire assembly process. A scheduling approach is also implemented to allocate the workers throughout the assembly tasks. The efforts of this PhD work can be visualized and edited by either a web-interface or IC.IDO virtual reality platform. The implemented tool can accommodate changes after a user has seen the result.
Advisors/Committee Members: Campbell, Matthew I. (advisor), Logendran, Rasaratnam (committee member).
Subjects/Keywords: Assembly Planning; Manufacturing processes – Planning
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APA (6th Edition):
Rafibakhsh, N. (2017). Automated Assembly Planning : From CAD Model to Virtual Assembly Process. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/60626
Chicago Manual of Style (16th Edition):
Rafibakhsh, Nima. “Automated Assembly Planning : From CAD Model to Virtual Assembly Process.” 2017. Doctoral Dissertation, Oregon State University. Accessed January 23, 2021.
http://hdl.handle.net/1957/60626.
MLA Handbook (7th Edition):
Rafibakhsh, Nima. “Automated Assembly Planning : From CAD Model to Virtual Assembly Process.” 2017. Web. 23 Jan 2021.
Vancouver:
Rafibakhsh N. Automated Assembly Planning : From CAD Model to Virtual Assembly Process. [Internet] [Doctoral dissertation]. Oregon State University; 2017. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1957/60626.
Council of Science Editors:
Rafibakhsh N. Automated Assembly Planning : From CAD Model to Virtual Assembly Process. [Doctoral Dissertation]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/60626
Oregon State University
10.
Schlegel, Stephen C.
A product development process measurement methodology applied to small manufacturing companies.
Degree: MS, Mechanical Engineering, 2000, Oregon State University
URL: http://hdl.handle.net/1957/33783
► The implementation of concurrent engineering into many large companies has greatly improved their product development processes. These companies have seen significant gains in quality and…
(more)
▼ The implementation of concurrent engineering into many large
companies has greatly improved their product development
processes.
These companies have seen significant gains in quality and customer
satisfaction with reduced product costs, defects, and time-to-market
(Lake, 1992). Many large companies have successfully employed this
relatively new product development philosophy. However, smaller
companies have not yet integrated this philosophy into their product
development systems with the success that larger companies have seen.
With small companies composing 98% of the
manufacturing firms in this
country (U.S. Census Bureau, 1995), there has been a recent push for
the development of implementation methods for small companies. This
paper presents a five step approach that small
manufacturing companies
can use to implement a concurrent engineering based product
development process. Our definition of a small
manufacturing company
is an organization with 50 or fewer employees and net annual sales of 10 million dollars or less. The first step provides a general outline for companies to use in documenting their current product development process. The second step involves comparing the company's current product development process to a concurrent engineering based product development process model that is general enough for nearly all
manufacturing firms. This step also includes the use of the theory of constraints and a so-called revised theory of constraints method to further refine the process understanding and description. Third, a new methodology for designing and applying process measurements is used to provide insight into the relationships that exists between the internal and external resources, requirements and deliverables of the product development process. It is during this step that the Process Measurement Matrix (PMM) is developed. Fourth, the PMM is used in conjunction with the analytical hierarchy process or a simple ranking technique to develop relative priorities. Finally, the appropriate measurements are constructed for each subprocess in the product development process.
Advisors/Committee Members: Ulman, David G. (advisor).
Subjects/Keywords: Manufacturing processes
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APA (6th Edition):
Schlegel, S. C. (2000). A product development process measurement methodology applied to small manufacturing companies. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/33783
Chicago Manual of Style (16th Edition):
Schlegel, Stephen C. “A product development process measurement methodology applied to small manufacturing companies.” 2000. Masters Thesis, Oregon State University. Accessed January 23, 2021.
http://hdl.handle.net/1957/33783.
MLA Handbook (7th Edition):
Schlegel, Stephen C. “A product development process measurement methodology applied to small manufacturing companies.” 2000. Web. 23 Jan 2021.
Vancouver:
Schlegel SC. A product development process measurement methodology applied to small manufacturing companies. [Internet] [Masters thesis]. Oregon State University; 2000. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1957/33783.
Council of Science Editors:
Schlegel SC. A product development process measurement methodology applied to small manufacturing companies. [Masters Thesis]. Oregon State University; 2000. Available from: http://hdl.handle.net/1957/33783
Oregon State University
11.
Smullin, Matteo M.
An Information Modeling Framework and Desktop Application to Compose Unit Manufacturing Process Models for Sustainable Manufacturing Assessment.
Degree: MS, Industrial Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/60059
► The demand from consumers for more sustainable products, and the need to comply with government regulations motivates manufacturers to evaluate their operations for opportunities to…
(more)
▼ The demand from consumers for more sustainable products, and the need to comply with government regulations motivates manufacturers to evaluate their operations for opportunities to reduce environmental impact and improve economic competitiveness. Manufacturers have actively improved the sustainability performance of their products through the use of sustainability assessment methods and tools. Recently however, manufacturers have struggled to maintain the necessary gains in energy and material efficiency due to the inadequacy of current, mature sustainability assessment methods and tools. This situation is compounded since new methods and tools continue to be developed for specialized applications, leading to inaccurate assessments in other domains. Overcoming these barriers requires standardized sustainability assessment methods and tools that are ready for use (plug-and-play) and contain accurate
manufacturing process-level information. The research conducted herein posits that this barrier can be overcome through the advancement of information modeling and the automation of
manufacturing system assessments. Thus,
manufacturing process models would be composed to preserve information flows. Therefore, the work presented attempted three goals: 1) Assess the barriers to sustainable
manufacturing through a review of the academic literature and roundtable meetings with industry; 2) Propose an information modeling framework to trace, capture, and control information flows within a composed
manufacturing system for sustainability assessment; and 3) Develop a desktop application implementing the framework to accelerate the sustainability assessment of composed
manufacturing systems. Results from realizing the framework through an underpinning XML Schema and overlaying graphical user interface indicate that the presented approach would be useful in conducting sustainable
manufacturing assessments. Future work should focus on improving the robustness of the information framework and the resulting XML Schema by incorporating validation content and structure for improved quality and composability of unit
manufacturing process models.
Advisors/Committee Members: Haapala, Karl R. (advisor), Porter, David (committee member).
Subjects/Keywords: Information Model; Manufacturing processes – Automation
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Manager
APA (6th Edition):
Smullin, M. M. (2016). An Information Modeling Framework and Desktop Application to Compose Unit Manufacturing Process Models for Sustainable Manufacturing Assessment. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/60059
Chicago Manual of Style (16th Edition):
Smullin, Matteo M. “An Information Modeling Framework and Desktop Application to Compose Unit Manufacturing Process Models for Sustainable Manufacturing Assessment.” 2016. Masters Thesis, Oregon State University. Accessed January 23, 2021.
http://hdl.handle.net/1957/60059.
MLA Handbook (7th Edition):
Smullin, Matteo M. “An Information Modeling Framework and Desktop Application to Compose Unit Manufacturing Process Models for Sustainable Manufacturing Assessment.” 2016. Web. 23 Jan 2021.
Vancouver:
Smullin MM. An Information Modeling Framework and Desktop Application to Compose Unit Manufacturing Process Models for Sustainable Manufacturing Assessment. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1957/60059.
Council of Science Editors:
Smullin MM. An Information Modeling Framework and Desktop Application to Compose Unit Manufacturing Process Models for Sustainable Manufacturing Assessment. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/60059
University of Wisconsin – Stout
12.
Wink, Eric A.
Proposed change of work in process (WIP) inventory for the polishing department at APN, Incorporated.
Degree: 2003, University of Wisconsin – Stout
URL: http://www.uwstout.edu/lib/thesis/2003/2003winke.pdf
;
http://digital.library.wisc.edu/1793/41135
Subjects/Keywords: Manufacturing processes
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APA (6th Edition):
Wink, E. A. (2003). Proposed change of work in process (WIP) inventory for the polishing department at APN, Incorporated. (Thesis). University of Wisconsin – Stout. Retrieved from http://www.uwstout.edu/lib/thesis/2003/2003winke.pdf ; http://digital.library.wisc.edu/1793/41135
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wink, Eric A. “Proposed change of work in process (WIP) inventory for the polishing department at APN, Incorporated.” 2003. Thesis, University of Wisconsin – Stout. Accessed January 23, 2021.
http://www.uwstout.edu/lib/thesis/2003/2003winke.pdf ; http://digital.library.wisc.edu/1793/41135.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wink, Eric A. “Proposed change of work in process (WIP) inventory for the polishing department at APN, Incorporated.” 2003. Web. 23 Jan 2021.
Vancouver:
Wink EA. Proposed change of work in process (WIP) inventory for the polishing department at APN, Incorporated. [Internet] [Thesis]. University of Wisconsin – Stout; 2003. [cited 2021 Jan 23].
Available from: http://www.uwstout.edu/lib/thesis/2003/2003winke.pdf ; http://digital.library.wisc.edu/1793/41135.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wink EA. Proposed change of work in process (WIP) inventory for the polishing department at APN, Incorporated. [Thesis]. University of Wisconsin – Stout; 2003. Available from: http://www.uwstout.edu/lib/thesis/2003/2003winke.pdf ; http://digital.library.wisc.edu/1793/41135
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Florida State University
13.
Guo, Yong, 1977-.
Efficient Mixed-Level Fractional Factorial Designs: Evaluation, Augmentation and Application.
Degree: PhD, Industrial and Manufacturing Engineering, 2006, Florida State University
URL: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3910
;
► In general, a minimum aberration criterion is used to evaluate fractional factorial designs. This dissertation begins with a comprehensive review and comparison of minimum aberration…
(more)
▼ In general, a minimum aberration criterion is used to evaluate fractional factorial designs. This dissertation begins with a comprehensive review and comparison of minimum aberration criteria definitions regarding their applications, relationships, advantages, limitations and drawbacks. A new criterion called the general balance metric, is proposed to evaluate and compare mixed-level fractional factorial designs. The general balance metric measures the degree of balance for both main effects and interaction effects. This criterion is related to, and dominates orthogonality criteria as well as traditional minimum aberration criteria. Besides, the proposed criterion provides immediate feedback and comprehensively assesses designs and has practical interpretations. The metric can also be used for the purpose of design augmentation to improve model fit. Based upon the proposed criterion, a method is proposed to identify the optimal foldover strategies for efficient mixed-level designs. The analysis of mixed-level designs involving qualitative factors can be achieved through indicator variables or contrast coefficients. A regression model is developed to include qualitative factor interactions which have been previously ignored.
A Dissertation submitted to the Department of Industrial and Manufacturing Engineering in partial fulfillment of the requirements for the degree of Doctor of
Philosophy.
Spring Semester, 2006.
April 7, 2006.
Mixed-Level Designs, Augmentation, Qualitative Factor, General Balance Metric, Design Of Experiments, Foldover, Minimum Aberration Criterion
James R. Simpson, Professor Directing Dissertation; Xufeng Niu, Outside Committee Member; Samuel A. Awoniyi, Committee Member; Joseph J. Pignatiello, Jr., Committee Member.
Advisors/Committee Members: James R. Simpson (professor directing dissertation), Xufeng Niu (outside committee member), Samuel A. Awoniyi (committee member), Joseph J. Pignatiello (committee member).
Subjects/Keywords: Manufacturing processes
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APA (6th Edition):
Guo, Yong, 1. (2006). Efficient Mixed-Level Fractional Factorial Designs: Evaluation, Augmentation and Application. (Doctoral Dissertation). Florida State University. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-3910 ;
Chicago Manual of Style (16th Edition):
Guo, Yong, 1977-. “Efficient Mixed-Level Fractional Factorial Designs: Evaluation, Augmentation and Application.” 2006. Doctoral Dissertation, Florida State University. Accessed January 23, 2021.
http://purl.flvc.org/fsu/fd/FSU_migr_etd-3910 ;.
MLA Handbook (7th Edition):
Guo, Yong, 1977-. “Efficient Mixed-Level Fractional Factorial Designs: Evaluation, Augmentation and Application.” 2006. Web. 23 Jan 2021.
Vancouver:
Guo, Yong 1. Efficient Mixed-Level Fractional Factorial Designs: Evaluation, Augmentation and Application. [Internet] [Doctoral dissertation]. Florida State University; 2006. [cited 2021 Jan 23].
Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3910 ;.
Council of Science Editors:
Guo, Yong 1. Efficient Mixed-Level Fractional Factorial Designs: Evaluation, Augmentation and Application. [Doctoral Dissertation]. Florida State University; 2006. Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3910 ;
Florida State University
14.
Shankar, Kadambala Ravi.
Preparation and Characterization of Magnetically Aligned Carbon Nanotube Buckypaper and Composite.
Degree: MS, Industrial and Manufacturing Engineering, 2003, Florida State University
URL: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3403
;
► Carbon nanotubes are theoretically one of the strongest and stiffest materials with a calculated tensile strength of ~200 giga Pascal and modulus of more than…
(more)
▼ Carbon nanotubes are theoretically one of the strongest and stiffest materials with a calculated tensile strength of ~200 giga Pascal and modulus of more than 1-4 tera Pascal for a single walled nanotube (SWNT). If the mechanical properties of SWNT could be effectively incorporated into a polymer matrix, composites with lightweight, exceptional strength and stiffness can be achieved. The effective utilization of nanotubes in composites for applications depends on the ability to disperse the nanotubes uniformly throughout the matrix. Carbon nanotubes are anisotropic in nature. Therefore to take advantage of the nanotubes in the axial direction, controlled tube orientation or degree of alignment of nanotubes in the polymer matrix is very important to realize their high mechanical and functional properties. The nanocomposites produced by current conventional methods using direct mixing, melt blending or solution casting have failed to yield significant improvements in composite modulus. Although tremendous progress has been made towards understanding the properties of individual carbon nanotubes, but attaining the true potential of the bulk polymeric nanocomposites have been hindered by the lack of uniform SWNT dispersion, poor interfacial bonding, inadequate tube loading and uncontrollable tube orientation or degree of alignment. This thesis work developed an innovative approach for producing nanocomposites that has uniform SWNT dispersion, high tube loading and most importantly controlled tube orientation. In this research, these properties in composites were achieved by using magnetically aligned buckypapers and resin infusion system. The aligned nanotube buckypaper and composite were characterized using AFM and SEM. The mechanical properties of these materials were experimentally determined using DMA and were theoretically verified. The electrical properties of these materials were also experimentally determined using 4-probe resistivity measurements. Significant tube alignment has been achieved in the resultant buckypaper and nanocomposites. It is shown that the developed method is an effective way for producing nanocomposites with uniform SWNT dispersion desired tube alignment and high tube loading.
A Thesis submitted to the Department of Industrial Engineering in partial fulfillment of the requirements for the degree of Master of Science.
Fall Semester, 2003.
November 10, 2003.
Carbon, Nanotubes, SWNT Alignment, Composite, Polymer, Anisotropy, Resistivity, Nanocomposite
Zhiyong Liang, Professor Directing Thesis; Ben Wang, Committee Member; Chuck Zhang, Committee Member.
Advisors/Committee Members: Zhiyong Liang (professor directing thesis), Ben Wang (committee member), Chuck Zhang (committee member).
Subjects/Keywords: Manufacturing processes
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Manager
APA (6th Edition):
Shankar, K. R. (2003). Preparation and Characterization of Magnetically Aligned Carbon Nanotube Buckypaper and Composite. (Masters Thesis). Florida State University. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-3403 ;
Chicago Manual of Style (16th Edition):
Shankar, Kadambala Ravi. “Preparation and Characterization of Magnetically Aligned Carbon Nanotube Buckypaper and Composite.” 2003. Masters Thesis, Florida State University. Accessed January 23, 2021.
http://purl.flvc.org/fsu/fd/FSU_migr_etd-3403 ;.
MLA Handbook (7th Edition):
Shankar, Kadambala Ravi. “Preparation and Characterization of Magnetically Aligned Carbon Nanotube Buckypaper and Composite.” 2003. Web. 23 Jan 2021.
Vancouver:
Shankar KR. Preparation and Characterization of Magnetically Aligned Carbon Nanotube Buckypaper and Composite. [Internet] [Masters thesis]. Florida State University; 2003. [cited 2021 Jan 23].
Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3403 ;.
Council of Science Editors:
Shankar KR. Preparation and Characterization of Magnetically Aligned Carbon Nanotube Buckypaper and Composite. [Masters Thesis]. Florida State University; 2003. Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3403 ;
Florida State University
15.
Kim, Myungsoo.
Modeling, Manufacturing, and Characterization of Nanocomposites and Multiscale Composites.
Degree: PhD, Industrial and Manufacturing Engineering, 2009, Florida State University
URL: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3069
;
► Carbon nanotubes (CNTs) have excellent mechanical, electrical, and thermal properties making them outstanding reinforcements in polymer matrix composites. In this research, the effect of CNT-integration…
(more)
▼ Carbon nanotubes (CNTs) have excellent mechanical, electrical, and thermal properties making them outstanding reinforcements in polymer matrix composites. In this research, the effect of CNT-integration in polymer matrices (two-phase) and fiber-reinforced composites (three-phase) was studied theoretically and experimentally. This work sought to enhance the mechanical properties of composites by the improving dispersion of CNTs in polymers. This was achieved by optimizing the CNT/polymer composite manufacturing process. Generally, higher sonication intensity and longer sonication time improved the mechanical properties of CNT/polymer composites through improved CNT dispersion. Simulations for CNT/polymer composites (nanocomposites) and CNT/fiber/polymer composites (multiscale composites) were successfully carried out using a new method that combines nanocomposites micromechanics and woven fiber micromechanics. With this new method, the mechanical properties, including the Young's modulus, Poisson's ratio, and shear modulus, of nanocomposites and multiscale composites were predicted in terms of CNT loading in a polymer. The relationships between the mechanical properties of the composites and aspect ratios of the CNTs were studied and, as the third part of the simulation, the mechanical properties of multiscale composites that have no CNTs in the fiber strands were compared with those of multiscale composites that have CNTs in the fiber strands. In order to compare the predicted mechanical properties obtained by the simulations, nano and multiscale composites were manufactured and characterized. Good dispersion of the CNTs and strong bonding between the CNTs and polymer matrix and fibers and matrix are necessary to improve the mechanical properties of nanocomposites and multiscale composites.
A Dissertation submitted to the Department of Industrial and Manufacturing Engineering in partial fulfillment of the requirements for the degree of Doctor of
Philosophy.
Summer Semester, 2009.
April 3, 2009.
Carbon Nanotubes, Design of Experiments (DOE), Nanocomposites, Multiscale Composites, Mechanical Modeling
Okenwa I. Okoli, Professor Directing Dissertation; Sachin Shanbhag, Outside Committee Member; Young-Bin Park, Committee Member; Zhiyong Liang, Committee Member; David Jack, Committee Member.
Advisors/Committee Members: Okenwa I. Okoli (professor directing dissertation), Sachin Shanbhag (outside committee member), Young-Bin Park (committee member), Zhiyong Liang (committee member), David Jack (committee member).
Subjects/Keywords: Manufacturing processes
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Export
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Manager
APA (6th Edition):
Kim, M. (2009). Modeling, Manufacturing, and Characterization of Nanocomposites and Multiscale Composites. (Doctoral Dissertation). Florida State University. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-3069 ;
Chicago Manual of Style (16th Edition):
Kim, Myungsoo. “Modeling, Manufacturing, and Characterization of Nanocomposites and Multiscale Composites.” 2009. Doctoral Dissertation, Florida State University. Accessed January 23, 2021.
http://purl.flvc.org/fsu/fd/FSU_migr_etd-3069 ;.
MLA Handbook (7th Edition):
Kim, Myungsoo. “Modeling, Manufacturing, and Characterization of Nanocomposites and Multiscale Composites.” 2009. Web. 23 Jan 2021.
Vancouver:
Kim M. Modeling, Manufacturing, and Characterization of Nanocomposites and Multiscale Composites. [Internet] [Doctoral dissertation]. Florida State University; 2009. [cited 2021 Jan 23].
Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3069 ;.
Council of Science Editors:
Kim M. Modeling, Manufacturing, and Characterization of Nanocomposites and Multiscale Composites. [Doctoral Dissertation]. Florida State University; 2009. Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3069 ;
Florida State University
16.
Kynard, Kristin.
Pmma Carbon Nanotube Nanocomposite Foams for Energy Dissipation Applications.
Degree: MS, Industrial and Manufacturing Engineering, 2011, Florida State University
URL: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3037
;
► Nanomaterials have attracted a great deal of research efforts due to the potential unprecedented properties these materials may provide. Carbon nanotubes (CNTs) are of particular…
(more)
▼ Nanomaterials have attracted a great deal of research efforts due to the potential unprecedented properties these materials may provide. Carbon nanotubes (CNTs) are of particular interest because of their exceptional mechanical, thermal and electrical properties. The purpose of this research is to develop poly (methyl methacrylate) (PMMA) carbon nanotubes (CNTs) nanocomposite foams with improved energy dissipation capabilities (toughness). PMMA CNTs nanocomposites were first synthesized by anti-solvent precipitation process (ASP). Nanocomposites with different CNTs concentrations were prepared. The dispersion of the CNTs in the polymer matrix was observed by scanning electron microscopy (SEM). Nanocomposite foams were prepared by a batch process using carbon dioxide as the foaming agent. The foaming was conducted from the retrograde phase that enabled high CO2 solubility and facilitated formation of foams of high bubble density and small bubble size. The effects of foaming temperature, foaming time and CNTs concentration on the foam expansion ratio was investigated. The morphology of the prepared foams was studied by SEM. The compressive properties of the foams were measured and toughness determined. The nanocomposite foams with 0.5% CNT show improvement in energy absorbing capabilities. Upon further increasing CNT concentration, the capability decreases. Further analysis revealed that this was due to the non-uniform foam morphology in those nanocomposite foams. This in turn resulted in from the mixed nucleation mechanisms because of the insufficient CNT dispersion when foamed from the retrograde phase. Enhancement of CNT dispersion in the matrix is needed in order to improve the uniformity of the foams and realize the potential of these materials.
A Thesis submitted to the Department of Industrial and Manufacturing Engineering in partial fulfillment of the requirements for the degree of Master of
Science.
Summer Semester, 2011.
June 30, 2011.
PMMA Nanocomposite Foams, Compressive Properties, Energy Absorbtion, Multi-walled Carbon Nanotubes
Changchun Zeng, Professor Directing Thesis; Okenwa Okoli, Committee Member; Arda Vanli, Committee Member.
Advisors/Committee Members: Changchun Zeng (professor directing thesis), Okenwa Okoli (committee member), Arda Vanli (committee member).
Subjects/Keywords: Industrial engineering; Manufacturing processes
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APA (6th Edition):
Kynard, K. (2011). Pmma Carbon Nanotube Nanocomposite Foams for Energy Dissipation Applications. (Masters Thesis). Florida State University. Retrieved from http://purl.flvc.org/fsu/fd/FSU_migr_etd-3037 ;
Chicago Manual of Style (16th Edition):
Kynard, Kristin. “Pmma Carbon Nanotube Nanocomposite Foams for Energy Dissipation Applications.” 2011. Masters Thesis, Florida State University. Accessed January 23, 2021.
http://purl.flvc.org/fsu/fd/FSU_migr_etd-3037 ;.
MLA Handbook (7th Edition):
Kynard, Kristin. “Pmma Carbon Nanotube Nanocomposite Foams for Energy Dissipation Applications.” 2011. Web. 23 Jan 2021.
Vancouver:
Kynard K. Pmma Carbon Nanotube Nanocomposite Foams for Energy Dissipation Applications. [Internet] [Masters thesis]. Florida State University; 2011. [cited 2021 Jan 23].
Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3037 ;.
Council of Science Editors:
Kynard K. Pmma Carbon Nanotube Nanocomposite Foams for Energy Dissipation Applications. [Masters Thesis]. Florida State University; 2011. Available from: http://purl.flvc.org/fsu/fd/FSU_migr_etd-3037 ;
17.
Loveland, Jennifer L.
Filling orders faster.
Degree: 2019, University of Wisconsin – Stout
URL: http://digital.library.wisc.edu/1793/79626
;
http://www2.uwstout.edu/content/lib/thesis/2019/2019lovelandj.pdf
► Customers continue to want superior service and quick response times. The purpose of this study was to identify what was happening in each step of…
(more)
▼ Customers continue to want superior service and quick response times. The purpose of this study was to identify what was happening in each step of the order fulfillment process, benchmark external research, collect internal data, and analyze all the data to find the root cause of the delays at Company XYZ. The main objective was to propose solutions of what needed to be done to fill customer orders in two days or less. Utilizing lean
manufacturing tools, benchmarking external data, and evaluating real time order processing data, Company XYZ would have the ability to improve the order fulfillment process.
Advisors/Committee Members: Keyes, James.
Subjects/Keywords: Manufacturing processes; Customer services
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APA (6th Edition):
Loveland, J. L. (2019). Filling orders faster. (Thesis). University of Wisconsin – Stout. Retrieved from http://digital.library.wisc.edu/1793/79626 ; http://www2.uwstout.edu/content/lib/thesis/2019/2019lovelandj.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Loveland, Jennifer L. “Filling orders faster.” 2019. Thesis, University of Wisconsin – Stout. Accessed January 23, 2021.
http://digital.library.wisc.edu/1793/79626 ; http://www2.uwstout.edu/content/lib/thesis/2019/2019lovelandj.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Loveland, Jennifer L. “Filling orders faster.” 2019. Web. 23 Jan 2021.
Vancouver:
Loveland JL. Filling orders faster. [Internet] [Thesis]. University of Wisconsin – Stout; 2019. [cited 2021 Jan 23].
Available from: http://digital.library.wisc.edu/1793/79626 ; http://www2.uwstout.edu/content/lib/thesis/2019/2019lovelandj.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Loveland JL. Filling orders faster. [Thesis]. University of Wisconsin – Stout; 2019. Available from: http://digital.library.wisc.edu/1793/79626 ; http://www2.uwstout.edu/content/lib/thesis/2019/2019lovelandj.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
18.
Jokinen, Ville.
Mapping and analysing manufacturing processes.
Degree: 2020, Theseus
URL: http://www.theseus.fi/handle/10024/303662
► In this thesis, two manufacturing processes used to produce the same bearing bush were mapped and analysed at Oy Johnson Metall Finland Ab. The goal…
(more)
▼ In this thesis, two manufacturing processes used to produce the same bearing bush were mapped and analysed at Oy Johnson Metall Finland Ab. The goal for this thesis was to produce visual representations of the manufacturing process’s workflow, attributes and the capability to produce quality. The thesis was implemented by examining the currently used manufacturing process and an alternative manufacturing process by using flowcharts, value analyses, value stream maps and SPC. The need for the mapping and analysing came from the company’s desire to improve the currently used manufacturing process.
The mapping and analysing revealed that both manufacturing processes had strengths over each other when they were compared together. The currently used manufacturing process had an ability to produce cast faster, but the machining phase required more time. The alternative manufacturing process included more value adding activities and fewer required stages in producing the bearing bush. The SPC study did reveal that there were small differences on quality, but this had no significant impact on the overall quality. The only distinctions noticed quality wise were minor variations in the measuring results that were caused by adjustments made at the lathe during the machining.
Based on the results of the thesis, two suggestions were made for follow-up actions. If the company is willing, a new SPC study could be made for the manufacturing processes in which no adjustments would be made on the lathes during the machining phase. By doing this, actual data on how the machining parameters act during the machining would be gained. The company could also adapt Six Sigma as a part of its organization. Six Sigma would not only reduce the variation inside the bearing bushes manufacturing process, but in all the other processes the company uses.
In this thesis, two manufacturing processes used to produce the same bearing bush were mapped and analysed at Oy Johnson Metall Finland Ab. The goal for this thesis was to produce visual representations of the manufacturing process’s workflow, attributes and the capability to produce quality. The thesis was implemented by examining the currently used manufacturing process and an alternative manufacturing process by using flowcharts, value analyses, value stream maps and SPC. The need for the mapping and analysing came from the company’s desire to improve the currently used manufacturing process.
The mapping and analysing revealed that both manufacturing processes had strengths over each other when they were compared together. The currently used manufacturing process had an ability to produce cast faster, but the machining phase required more time. The alternative manufacturing process included more value adding activities and fewer required stages in producing the bearing bush. The SPC study did reveal that there were small differences on quality, but this had no significant impact on the overall quality. The only distinctions noticed quality wise were minor variations in the measuring…
Subjects/Keywords: manufacturing; processes; mapping; analysing
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APA ·
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APA (6th Edition):
Jokinen, V. (2020). Mapping and analysing manufacturing processes. (Thesis). Theseus. Retrieved from http://www.theseus.fi/handle/10024/303662
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Jokinen, Ville. “Mapping and analysing manufacturing processes.” 2020. Thesis, Theseus. Accessed January 23, 2021.
http://www.theseus.fi/handle/10024/303662.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jokinen, Ville. “Mapping and analysing manufacturing processes.” 2020. Web. 23 Jan 2021.
Vancouver:
Jokinen V. Mapping and analysing manufacturing processes. [Internet] [Thesis]. Theseus; 2020. [cited 2021 Jan 23].
Available from: http://www.theseus.fi/handle/10024/303662.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jokinen V. Mapping and analysing manufacturing processes. [Thesis]. Theseus; 2020. Available from: http://www.theseus.fi/handle/10024/303662
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas Tech University
19.
Stiles, Marvin E.
Program for a ceramic tile manufacturing plant: Monarch tile manufacturing, Inc. San Angelo, Texas.
Degree: 1969, Texas Tech University
URL: http://hdl.handle.net/2346/50409
Subjects/Keywords: Manufacturing processes
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APA (6th Edition):
Stiles, M. E. (1969). Program for a ceramic tile manufacturing plant: Monarch tile manufacturing, Inc. San Angelo, Texas. (Thesis). Texas Tech University. Retrieved from http://hdl.handle.net/2346/50409
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Stiles, Marvin E. “Program for a ceramic tile manufacturing plant: Monarch tile manufacturing, Inc. San Angelo, Texas.” 1969. Thesis, Texas Tech University. Accessed January 23, 2021.
http://hdl.handle.net/2346/50409.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Stiles, Marvin E. “Program for a ceramic tile manufacturing plant: Monarch tile manufacturing, Inc. San Angelo, Texas.” 1969. Web. 23 Jan 2021.
Vancouver:
Stiles ME. Program for a ceramic tile manufacturing plant: Monarch tile manufacturing, Inc. San Angelo, Texas. [Internet] [Thesis]. Texas Tech University; 1969. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/2346/50409.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Stiles ME. Program for a ceramic tile manufacturing plant: Monarch tile manufacturing, Inc. San Angelo, Texas. [Thesis]. Texas Tech University; 1969. Available from: http://hdl.handle.net/2346/50409
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Limerick
20.
Obande, Winifred O.
Mechanical characterisation of composite materials with 3D woven reinforcement architectures.
Degree: 2016, University of Limerick
URL: http://hdl.handle.net/10344/5596
► peer-reviewed
The use of traditional two-dimensional (2D) fibre preforms can be associated with poor out-of-plane and interlaminar mechanical performance, particularly in response to impact loads.…
(more)
▼ peer-reviewed
The use of traditional two-dimensional (2D) fibre preforms can be associated with poor out-of-plane and interlaminar mechanical performance, particularly in response to impact loads. Such preforms comprise multiple plies which necessitate labour-intensive ply cutting and assembly steps. 3D woven textiles, due to the incorporation of through-thickness yarns, have been found to exhibit superior out-of-plane mechanical properties whilst simultaneously reducing ply-assembly time and cost (single-piece preform construction). Their delamination resistance and damage tolerance have been extensively investigated over the last number of years; however, there is a paucity of published work on their in-plane and out-of-plane mechanical properties when compared to their 2D counterparts. Thus, this research details a comprehensive mechanical characterisation of an orthogonal 3D woven composite in comparison with a suitable 2D laminate. Composite panels have been manufactured with Henkel’s Loctite BZ9130 benzoxazine resin by means of the EADS-patented vacuum assisted process (VAP®). In-plane compressive performance, impact damage resistance, damage tolerance, and out-of-plane tensile behaviour have been evaluated for both reinforcement architectures. Coupons were subjected to an energy level of 6 Joules per millimetre of laminate thickness by means of a drop-weight impact tower. Damage resistance was quantified as a function of impact damage area using penetrant-enhanced x-radiography (PEXR). Combined loading compression (CLC) tests were performed to complement compression after impact (CAI) testing which was conducted to evaluate the materials’ damage tolerance. Furthermore, out-of-plane tensile (OPT) testing has been performed on cruciform coupons using a novel test method. The experimental data revealed a 7.5% higher compressive strength for the 2D material, which was expected due to the presence of crimp and yarn misalignments within the 3D woven material. In contrast, the 3D material performed better than the 2D laminate for all other tests with 13% lower damage area, 15.5% higher residual compressive strength and 36.8% higher mean out-of-plane tensile strength.
It can thus be concluded that the incorporation of through-thickness yarn components can lead to significant improvements in damage resistance and tolerance by arresting the growth of delamination and limiting the growth of localised damage. Furthermore, when loaded in the out-of-plane direction, as with the OPT test configuration, much of the load is borne by the z-binder bundles rather than the much weaker fibre-matrix interface (as is the case with 2D laminates), and consequently, the OPT strengths are higher in the 3D woven composites. Limitations of this test method have been identified and recommendations for further development are presented in the concluding remarks.
Advisors/Committee Members: Stanley, Walter.
Subjects/Keywords: composite materials; manufacturing processes
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Manager
APA (6th Edition):
Obande, W. O. (2016). Mechanical characterisation of composite materials with 3D woven reinforcement architectures. (Thesis). University of Limerick. Retrieved from http://hdl.handle.net/10344/5596
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Obande, Winifred O. “Mechanical characterisation of composite materials with 3D woven reinforcement architectures.” 2016. Thesis, University of Limerick. Accessed January 23, 2021.
http://hdl.handle.net/10344/5596.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Obande, Winifred O. “Mechanical characterisation of composite materials with 3D woven reinforcement architectures.” 2016. Web. 23 Jan 2021.
Vancouver:
Obande WO. Mechanical characterisation of composite materials with 3D woven reinforcement architectures. [Internet] [Thesis]. University of Limerick; 2016. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10344/5596.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Obande WO. Mechanical characterisation of composite materials with 3D woven reinforcement architectures. [Thesis]. University of Limerick; 2016. Available from: http://hdl.handle.net/10344/5596
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
California State University – Sacramento
21.
Clark, Edward C.
Additive manufacturing of carbon composite panels for increased through-hole strength.
Degree: 2019, California State University – Sacramento
URL: http://hdl.handle.net/10211.3/214313
► Much of the development of fiber-reinforced composites for additive manufacturing has been efforts to meet or exceed the performance of traditionally processed metal alloys. Additive…
(more)
▼ Much of the development of fiber-reinforced composites for additive
manufacturing has been efforts to meet or exceed the performance of traditionally processed metal alloys. Additive
Manufacturing (AM) with carbon fiber reinforced filaments has the potential to leverage the anisotropic nature of composites to increase the strength of components where needed without adding weight or bulk. One potential area to leverage this native anisotropy is around fastener holes. As bolted joints typically constitute the weakest part of a composite component, in this investigation we aim to determine if they may be strengthened by controlling the orientation of fibers around the hole. To this end, we compare bolt bearing testing results using NylonX material printed with two different bolted joint types: manufactured-in-place, or ???printed-in???, allowing for fiber orientation circumferentially around the hole, and post-drilled, and find dramatic difference in observed mechanical properties between the two hole generation methods.
Advisors/Committee Members: Topping, Troy D..
Subjects/Keywords: Manufacturing processes; Three-dimensional printing
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APA (6th Edition):
Clark, E. C. (2019). Additive manufacturing of carbon composite panels for increased through-hole strength. (Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.3/214313
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Clark, Edward C. “Additive manufacturing of carbon composite panels for increased through-hole strength.” 2019. Thesis, California State University – Sacramento. Accessed January 23, 2021.
http://hdl.handle.net/10211.3/214313.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Clark, Edward C. “Additive manufacturing of carbon composite panels for increased through-hole strength.” 2019. Web. 23 Jan 2021.
Vancouver:
Clark EC. Additive manufacturing of carbon composite panels for increased through-hole strength. [Internet] [Thesis]. California State University – Sacramento; 2019. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10211.3/214313.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Clark EC. Additive manufacturing of carbon composite panels for increased through-hole strength. [Thesis]. California State University – Sacramento; 2019. Available from: http://hdl.handle.net/10211.3/214313
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Massey University
22.
Winchester, James.
Model based analysis of the operation and control of falling film evaporators : a thesis presented for the degree of Doctor of Philosophy in Technology and Engineering, Massey University, Palmerston North, New Zealand
.
Degree: 2011, Massey University
URL: http://hdl.handle.net/10179/2181
► Falling film evaporators are commonly used in the New Zealand dairy industry for the production of milk powders. Milk powder is not susceptible to bacterial…
(more)
▼ Falling film evaporators are commonly used in the New Zealand dairy industry for the production of milk powders. Milk powder is not susceptible to bacterial damage and it is easy to transport, whereas milk itself has neither of these characteristics. As a result milk powders are an ideal export product for the New Zealand Dairy industry. However, despite their large amount of industrial use, there is a shortage of knowledge on the design, operation and control of falling film evaporators. The work discussed in this thesis was initiated with the aim of improving this situation. The aims of this work are split into three broad areas. Develop Model A first principles model for the Evaporator A plant at Kiwi Co-op Dairies will be developed from the Laws of Thermodynamics. The model is dynamic and includes the evaporator preheat sections. We will concentrate on developing the model for the subsequent analysis of the Evaporator A plant. Specifically, a steady state model will be developed for the optimisation/operation studies and a linear dynamic model for the controllability studies. Optimisation Studies Using the steady state model the operation/optimisation of the Evaporator A plant will be investigated. There are some simple aspects of the evaporator and preheat sections that will be discussed. However, an important aspect will be the evaporator operational optimisation with respect to energy costs, fouling, throughput and milk powder quality. Controllability Studies Using the dynamic model we will investigate the control of the evaporator plant. The dynamic model derived from first principles will be linearised to produce a linear constant coefficient dynamic model. This can be analysed using the standard traditional and some advanced control methods. Specifically we will be interested in disturbance rejection.
Subjects/Keywords: Evaporators;
Mathematical models;
Manufacturing processes
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APA (6th Edition):
Winchester, J. (2011). Model based analysis of the operation and control of falling film evaporators : a thesis presented for the degree of Doctor of Philosophy in Technology and Engineering, Massey University, Palmerston North, New Zealand
. (Thesis). Massey University. Retrieved from http://hdl.handle.net/10179/2181
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Winchester, James. “Model based analysis of the operation and control of falling film evaporators : a thesis presented for the degree of Doctor of Philosophy in Technology and Engineering, Massey University, Palmerston North, New Zealand
.” 2011. Thesis, Massey University. Accessed January 23, 2021.
http://hdl.handle.net/10179/2181.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Winchester, James. “Model based analysis of the operation and control of falling film evaporators : a thesis presented for the degree of Doctor of Philosophy in Technology and Engineering, Massey University, Palmerston North, New Zealand
.” 2011. Web. 23 Jan 2021.
Vancouver:
Winchester J. Model based analysis of the operation and control of falling film evaporators : a thesis presented for the degree of Doctor of Philosophy in Technology and Engineering, Massey University, Palmerston North, New Zealand
. [Internet] [Thesis]. Massey University; 2011. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10179/2181.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Winchester J. Model based analysis of the operation and control of falling film evaporators : a thesis presented for the degree of Doctor of Philosophy in Technology and Engineering, Massey University, Palmerston North, New Zealand
. [Thesis]. Massey University; 2011. Available from: http://hdl.handle.net/10179/2181
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rutgers University
23.
Engisch, William E.
Loss-in-weight feeding in continuous powder manufacturing.
Degree: PhD, Chemical and Biochemical Engineering, 2014, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/45245/
► Processes involving granular material handling are found in many industries, such as pharmaceutical, chemical, catalyst, and food. Significant differences are observed, both between materials as…
(more)
▼ Processes involving granular material handling are found in many industries, such as pharmaceutical, chemical, catalyst, and food. Significant differences are observed, both between materials as well as between handling methods. Often, special equipment has been developed to monitor, control, and feed these widely varied materials in order to enable the end user to continuously feed or dose the raw powder material so that it can be continuously processed, which has many advantages over batch processing. To address the difficulties of feeding granular materials, powder feeders are equipped with a variety of tooling that can be used for various rates and powders. Unfortunately most of the sizing and performance knowledge is internal to the feeding equipment manufacturers and is not generally available to the end-user. In this work, a method for evaluating feeding performance was developed, which allowed for testing that was independent of the type of feeder being evaluated. This method was applied to various feeders to characterize the feeders for the feeding of various powders. In addition, the effects of hopper refilling were quantified and investigated. Finally, the downstream effects were simulated. iii For each powder, the fluctuations caused during normal steady state feeding were minimized through tooling and feeder selection. The effects of refill were found to be considerably more significant than the fluctuations associated with steady state feeding. However, optimized refill schedules, easily reduced the deviations to more manageable levels. In continuous manufacturing systems, the feeders are a potential high risk to content uniformity. The implications of this are investigated from a overarching view of a pharmaceutical direct compression system with a specific focus on regulatory compliance and product quality. Regulatory compliance requires batch definition and raw material traceability, and solutions to both were investigated. The presented options for batch definition are based on the residence time distribution (RTD) of the system, which describes the dispersion of material across the interface between "batches". Raw material traceability was similarly investigated utilizing residence time distribution as a tool.
Advisors/Committee Members: Muzzio, Fernando J (chair), Ierapetritou, Marianthi (internal member), Ramachandran, Rohit (internal member), Kiang, San (outside member).
Subjects/Keywords: Granular materials; Manufacturing processes
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APA (6th Edition):
Engisch, W. E. (2014). Loss-in-weight feeding in continuous powder manufacturing. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/45245/
Chicago Manual of Style (16th Edition):
Engisch, William E. “Loss-in-weight feeding in continuous powder manufacturing.” 2014. Doctoral Dissertation, Rutgers University. Accessed January 23, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/45245/.
MLA Handbook (7th Edition):
Engisch, William E. “Loss-in-weight feeding in continuous powder manufacturing.” 2014. Web. 23 Jan 2021.
Vancouver:
Engisch WE. Loss-in-weight feeding in continuous powder manufacturing. [Internet] [Doctoral dissertation]. Rutgers University; 2014. [cited 2021 Jan 23].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45245/.
Council of Science Editors:
Engisch WE. Loss-in-weight feeding in continuous powder manufacturing. [Doctoral Dissertation]. Rutgers University; 2014. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/45245/
Rutgers University
24.
Turkoz, Mehmet, 1984-.
Distribution-free fault identification and anomaly detection in high-dimensional data.
Degree: PhD, Industrial and Systems Engineering, 2018, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/57741/
► Quality engineering is an essential activity in production processes and its objective is to ensure the quality of the products throughout the production stages. Many…
(more)
▼ Quality engineering is an essential activity in production
processes and its objective is to ensure the quality of the products throughout the production stages. Many
processes have several attributes that need to be continuously monitored to detect any variable changes in the production process. We refer to the monitoring process with several quality characteristics as multivariate statistical process control (MSPC). Most of the quality control procedures assume that the characteristics of the process follow normal distributions; however, this is a limiting assumption since the underlying distribution of the
processes may not be normal. In this dissertation, we present procedures to identify the faulty variables and detect anomalies in MSPC with high dimensional data when the underlying distribution of the process is unknown. We first propose a distribution-free adaptive step-down (DFASD) procedure, which is motivated by a well-known data description method called support vector data description (SVDD). This data description procedure includes the support vectors which identify the hypersphere boundary for the available data by using the kernel concept. In a high-dimensional process, identifying the variable or a subset of variables, which cause an out-of-control (OC) signal, is a challenging issue in quality engineering. DFASD procedure utilizes conditional statistics for the identification of faulty variables. The proposed DFASD procedure selects a variable having no significant evidence of a change at each step based on the variables that are selected in the previous steps. The proposed DFASD stops when there are no longer variables to classify to the unchanged set. Therefore, it concludes the variables which are not in the unchanged set as changed variables. We then present a new distribution-free fault identification procedure based on Bayesian inference which is called Bayesian SVDD (BSVDD). While the traditional SVDD assumes that the process parameters are constants to be determined, the center of hypersphere may be considered as a random vector with inherent randomness based on a given training dataset. We introduce a Bayesian approach for SVDD by assuming that a transformed data into the higher dimensional space follow normal distribution. A distance from a point to the center of the hypersphere is inversely proportional to the likelihood in the proposed model. This is because SVDD is a special case of the proposed BSVDD model, which improves SVDD by utilizing the precise prior knowledge. Therefore, by combining proposed BSVDD with an adaptive step-down procedure, we drive a new BSVDD based fault identification procedure for the MSPC. This is the first research to identify the faulty variables by using the distribution-free approach based on Bayesian inference. We also present an anomaly detection procedure which is easily applicable in detecting anomalies in multimode
processes. Traditional quality control procedures assume that normal observations are obtained from a single distribution. However, due…
Advisors/Committee Members: Jeong, Myong K. (chair), Elsayed, Elsayed A. (internal member), Pham, Hoang (internal member), Xie, Minge (outside member), School of Graduate Studies.
Subjects/Keywords: Manufacturing processes; Big data
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APA (6th Edition):
Turkoz, Mehmet, 1. (2018). Distribution-free fault identification and anomaly detection in high-dimensional data. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/57741/
Chicago Manual of Style (16th Edition):
Turkoz, Mehmet, 1984-. “Distribution-free fault identification and anomaly detection in high-dimensional data.” 2018. Doctoral Dissertation, Rutgers University. Accessed January 23, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/57741/.
MLA Handbook (7th Edition):
Turkoz, Mehmet, 1984-. “Distribution-free fault identification and anomaly detection in high-dimensional data.” 2018. Web. 23 Jan 2021.
Vancouver:
Turkoz, Mehmet 1. Distribution-free fault identification and anomaly detection in high-dimensional data. [Internet] [Doctoral dissertation]. Rutgers University; 2018. [cited 2021 Jan 23].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/57741/.
Council of Science Editors:
Turkoz, Mehmet 1. Distribution-free fault identification and anomaly detection in high-dimensional data. [Doctoral Dissertation]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/57741/
Rutgers University
25.
Wang, Zilong, 1989-.
Simulation-based process analysis and optimization for continuous pharmaceutical manufacturing.
Degree: PhD, Chemical and Biochemical Engineering, 2018, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/57755/
► This thesis explores to apply simulation-based mathematical tools to understand and improve continuous pharmaceutical manufacturing processes. On the basis of a continuous direct compaction process,…
(more)
▼ This thesis explores to apply simulation-based mathematical tools to understand and improve continuous pharmaceutical manufacturing processes. On the basis of a continuous direct compaction process, we propose a framework consisting of global sensitivity analysis, feasibility analysis, and optimization to systematically extract process knowledge from simulation models. Under this framework, efficient analysis and optimization methods have been developed for both deterministic systems and stochastic systems. Specifically, mathematical techniques including surrogate modeling and adaptive sampling are adopted to address difficult problems involving computationally expensive black-box systems. The developed algorithms in this thesis can be used to obtain a comprehensive knowledge of solids-based pharmaceutical processes.
Advisors/Committee Members: Ierapetritou, Marianthi G. (chair), Androulakis, Ioannis (internal member), Ramachandran, Rohit (internal member), Rogers, Amanda (outside member), School of Graduate Studies.
Subjects/Keywords: Pharmaceutical industry; Manufacturing processes
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APA (6th Edition):
Wang, Zilong, 1. (2018). Simulation-based process analysis and optimization for continuous pharmaceutical manufacturing. (Doctoral Dissertation). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/57755/
Chicago Manual of Style (16th Edition):
Wang, Zilong, 1989-. “Simulation-based process analysis and optimization for continuous pharmaceutical manufacturing.” 2018. Doctoral Dissertation, Rutgers University. Accessed January 23, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/57755/.
MLA Handbook (7th Edition):
Wang, Zilong, 1989-. “Simulation-based process analysis and optimization for continuous pharmaceutical manufacturing.” 2018. Web. 23 Jan 2021.
Vancouver:
Wang, Zilong 1. Simulation-based process analysis and optimization for continuous pharmaceutical manufacturing. [Internet] [Doctoral dissertation]. Rutgers University; 2018. [cited 2021 Jan 23].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/57755/.
Council of Science Editors:
Wang, Zilong 1. Simulation-based process analysis and optimization for continuous pharmaceutical manufacturing. [Doctoral Dissertation]. Rutgers University; 2018. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/57755/
Ryerson University
26.
Makaronets, Alexander.
Two-photon polymerization using femtosecond laser.
Degree: 2009, Ryerson University
URL: https://digital.library.ryerson.ca/islandora/object/RULA%3A1664
► The demand for microfabrication by laser technology has been the foundation of the new age of three-dimensional micro-structuring processes. One of these new processes that…
(more)
▼ The demand for microfabrication by laser technology has been the foundation of the new age of three-dimensional micro-structuring
processes. One of these new
processes that has been established in recent years has been the two-photon polymerization (2PP) technique by femtosecond lasers. Unlike the well known stereo-lithography (SL), this newly developing technology provides simple and rapid fabrication procedures and demonstrates much better quality and structural resolution. In addition, by using computer generated 3D models, this technique can produce any kind of 3D structures that can be then fabricated and integrated into complicated devices. Currently used strategies and methods to produce the smallest possible feature by using 2PP process are acceptable but the[sic] strive for enhanced results is necessary in order to continue the progression of such technique.This thesis proposes a broader knowledge on laser parameters that affect 2PP process and the implementation of such parameters in order to produce the smallest feature size and the highest aspect ratio structure possible. A high repetition rate, high power femtosecond laser is investigated for exceeding the quality demand established by the current market. An experimental study of the proposed laser system and the analysis of control parameters, such as laser power and repetition rate, are presented. The influence of pulse width, laser power, substrate material, and scanning speed on aspect ratio is analyzed in detail. The produced microstructure with the measured aspect ratio indicates the capability of meeting the quality and requirements that have been established by the current market.
Advisors/Committee Members: Venkatakrishnan, K. (Thesis advisor), Tan, Bo (Thesis advisor).
Subjects/Keywords: Femtosecond lasers – Industrial applications; Manufacturing processes. Microfabrication
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APA (6th Edition):
Makaronets, A. (2009). Two-photon polymerization using femtosecond laser. (Thesis). Ryerson University. Retrieved from https://digital.library.ryerson.ca/islandora/object/RULA%3A1664
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Makaronets, Alexander. “Two-photon polymerization using femtosecond laser.” 2009. Thesis, Ryerson University. Accessed January 23, 2021.
https://digital.library.ryerson.ca/islandora/object/RULA%3A1664.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Makaronets, Alexander. “Two-photon polymerization using femtosecond laser.” 2009. Web. 23 Jan 2021.
Vancouver:
Makaronets A. Two-photon polymerization using femtosecond laser. [Internet] [Thesis]. Ryerson University; 2009. [cited 2021 Jan 23].
Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1664.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Makaronets A. Two-photon polymerization using femtosecond laser. [Thesis]. Ryerson University; 2009. Available from: https://digital.library.ryerson.ca/islandora/object/RULA%3A1664
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Nelson Mandela Metropolitan University
27.
Kapeso, Mando Mulabita.
An Internet of things model for field service automation.
Degree: Faculty of Science, 2017, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/18641
► Due to the competitive nature of the global economy, organisations are continuously seeking ways of cutting costs and increasing efficiency to gain a competitive advantage.…
(more)
▼ Due to the competitive nature of the global economy, organisations are continuously seeking ways of cutting costs and increasing efficiency to gain a competitive advantage. Field service organisations that offer after sales support seek to gain a competitive advantage through downtime minimisation. Downtime is the time between service requests made by a customer or triggered by equipment failure and the completion of the service to rectify the problem by the field service team. Researchers have identified downtime as one of the key performance indicators for field service organisations. The lack of real-time access to information and inaccuracy of information are factors which contribute to the poor management of downtime. Various technology advancements have been adopted to address some of the challenges faced by field service organisations through automation. The emergence of an Internet of Things (IoT), has brought new enhancement possibilities to various industries, for instance, the manufacturing industry. The main research question that this study aims to address is “How can an Internet of Things be used to optimise field service automation?” The main research objective was to develop and evaluate a model for the optimisation of field services using an IoT’s features and technologies. The model aims at addressing challenges associated with the inaccuracy or/and lack of real-time access to information during downtime. The model developed is the theoretical artefact of the research methodology used in this study which is the Design Science Research Methodology (DSRM). The DSRM activities were adopted to fulfil the research objectives of this research. A literature review in the field services domain was conducted to establish the problems faced by field service organisations. Several interviews were held to verify the problems of FSM identified in literature and some potential solutions. During the design and development activity of the DSRM methodology, an IoT model for FSA was designed. The model consists of:The Four Layered Architecture; The Three Phase Data Flow Process; and Definition and descriptions of IoT-based elements and functions. The model was then used to drive the design, development, and evaluation of “proof of concept” prototype, the KapCha prototype. KapCha enables the optimisation of FSA using IoT techniques and features. The implementation of a sub-component of the KapCha system, in fulfilment of the research. The implementation of KapCha was applied to the context of a smart lighting environment in the case study. A two-phase evaluation was conducted to review both the theoretical model and the KapCha prototype. The model and KapCha prototype were evaluated using the Technical and Risk efficacy evaluation strategy from the Framework for Evaluation of Design Science (FEDS). The Technical Risk and Efficacy strategy made use of formative, artificial-summative and summative-naturalistic methods of evaluation. An artificial-summative evaluation was used to evaluate the design of the model.…
Subjects/Keywords: Internet of things; Manufacturing processes – Automation; Automation
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APA (6th Edition):
Kapeso, M. M. (2017). An Internet of things model for field service automation. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/18641
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kapeso, Mando Mulabita. “An Internet of things model for field service automation.” 2017. Thesis, Nelson Mandela Metropolitan University. Accessed January 23, 2021.
http://hdl.handle.net/10948/18641.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kapeso, Mando Mulabita. “An Internet of things model for field service automation.” 2017. Web. 23 Jan 2021.
Vancouver:
Kapeso MM. An Internet of things model for field service automation. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2017. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10948/18641.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kapeso MM. An Internet of things model for field service automation. [Thesis]. Nelson Mandela Metropolitan University; 2017. Available from: http://hdl.handle.net/10948/18641
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Johannesburg
28.
Keys, Vernon C.
Capital investment appraisal in a process environment.
Degree: 2012, University of Johannesburg
URL: http://hdl.handle.net/10210/6215
► M.Ing.
As the manufacturing environment evolved over the past century, the nature of investments in manufacturing capabilities changed dramatically. Automation can be seen as the…
(more)
▼ M.Ing.
As the manufacturing environment evolved over the past century, the nature of investments in manufacturing capabilities changed dramatically. Automation can be seen as the single biggest driver of this evolution; enabling the manufacturing fraternity to develop smarter technology in order to exploit the opportunities that were created by the volatility that exist in most markets. This lead to the development of flexible manufacturing technology. Constructing a definition of manufacturing flexibility is difficult mainly due to the various views and perspectives that exist of flexibility. In short, flexibility can be defined as the ability to react ( to any change ) with little penalty in time, effort, cost or performance. These technologies that enable a manufacturing system to be flexible in a certain manner are generally difficult to justify in terms of traditional financial yardsticks. This can be contributed to the diverse benefits to be gained from these investments; and often these benefits are of a nonfinancial nature. Furthermore, when reviewing investments in flexible manufacturing technology within a process environment there appears to be an even bigger problem. The relatively fixed nature of the design output of process equipment, and the enormous quantities of capital outlay initially required to erect and commission process plants, often makes it near impossible to justify any investment that does not deliver good financial returns within the short term. Thus it becomes clear that the traditional methods of investment appraisal within the process environment have become generally unsuitable; and this call for a re-evaluation of the processes applied to guide value adding investments. This study set out to deliver a logical approach to appraising investments in manufacturing flexibility by defining a framework to be applied. The proposed framework consists of the following 4 primary steps. Firstly the strategic direction followed by the business is defined; then an analysing of the manufacturing flexibility required is performed. The third step is to evaluate the manufacturing technology available and furthermore a suitable performance measured criteria is defined to evaluate the proposed investment. This model is set within the strategic context of the manufacturing strategy of a business and thus should ensure the development of manufacturing capabilities that will ensure business growth over the medium to long term.
Subjects/Keywords: Manufacturing processes - Automation - Economic aspects; Capital investments
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APA ·
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Export
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Manager
APA (6th Edition):
Keys, V. C. (2012). Capital investment appraisal in a process environment. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/6215
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Keys, Vernon C. “Capital investment appraisal in a process environment.” 2012. Thesis, University of Johannesburg. Accessed January 23, 2021.
http://hdl.handle.net/10210/6215.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Keys, Vernon C. “Capital investment appraisal in a process environment.” 2012. Web. 23 Jan 2021.
Vancouver:
Keys VC. Capital investment appraisal in a process environment. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10210/6215.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Keys VC. Capital investment appraisal in a process environment. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/6215
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Johannesburg
29.
Olckers, Nicolaas Johannes.
An evaluation of just-in-time principles as part of the logistics chain in an engineering business.
Degree: 2012, University of Johannesburg
URL: http://hdl.handle.net/10210/6291
► M.Ing.
This report covers literature studies of Logistics, Warehousing (as one of the important components in the logistics chain) as well as Just-in-time (JIT) principles…
(more)
▼ M.Ing.
This report covers literature studies of Logistics, Warehousing (as one of the important components in the logistics chain) as well as Just-in-time (JIT) principles (as an important focus recently in logistics operations). The spareparts distribution function of a South African motorcar manufacturing business is then investigated and positioned within the logistics chain and warehousing concept, using the information from the literature study. The implementation of Just-in-time (JIT) principles with regards to specific components of the logistics chain is then investigated in the form of case studies. While most literature only discuss the implementation of JIT principles in a manufacturing environment, this report highlights the fact that substantial benefits can also be obtained by implementing JIT principles in a non-manufacturing environment. This investigation highlights specific benefits as well as negative points which support the literature and which could be used to guide future implementors of JIT principles.
Subjects/Keywords: Just-in-time systems.; Manufacturing processes.
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APA ·
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APA (6th Edition):
Olckers, N. J. (2012). An evaluation of just-in-time principles as part of the logistics chain in an engineering business. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/6291
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Olckers, Nicolaas Johannes. “An evaluation of just-in-time principles as part of the logistics chain in an engineering business.” 2012. Thesis, University of Johannesburg. Accessed January 23, 2021.
http://hdl.handle.net/10210/6291.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Olckers, Nicolaas Johannes. “An evaluation of just-in-time principles as part of the logistics chain in an engineering business.” 2012. Web. 23 Jan 2021.
Vancouver:
Olckers NJ. An evaluation of just-in-time principles as part of the logistics chain in an engineering business. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/10210/6291.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Olckers NJ. An evaluation of just-in-time principles as part of the logistics chain in an engineering business. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/6291
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
30.
Nagarajan, Raghavendran D.
Linking equations for the analysis of a serial automated workstation system.
Degree: MS, Industrial Engineering, 2003, Oregon State University
URL: http://hdl.handle.net/1957/32257
► In this research, an analytical model for analyzing a production line consisting of a series of automated workstations with infinite buffers is developed. Automated workstations…
(more)
▼ In this research, an analytical model for analyzing a production line consisting of a series
of automated workstations with infinite buffers is developed. Automated workstations are
assumed to have deterministic processing times, and independent exponentially
distributed operating time between failures and repair times. The analytical model starts
with existing results from a Markov chain model of two automated workstations in series,
where analytical expressions are developed for the average number of jobs in the second
workstation and its queue. This research focuses on the development of a set of linking
equations that can be used to analyze larger systems using a two workstation
decomposition approach. These linking equations utilize probabilities computed in the
two-workstation Markov chain model to compute workstation parameters for a single
workstation such that the first two moments of the inter-departure process from the two-workstation
system and the single workstation are the same. Simulations of a number of
different 3-workstation and 10-workstation systems were carried out employing a range
of workstation utilizations and processing time coefficients of variation. The results from
these simulations were compared with those calculated with the analytical model and
various two-parameter GI/G/1 approximations and linking equations present in the
literature. The analytical model resulted in an average absolute percentage difference of
less than 5% in the systems studied, and performed much better than general two parameter
G/G/1 approximations. The analytical model was also robust in ranking the
queues in the order of the average number of jobs present in the queues.
Advisors/Committee Members: Kim, David S. (advisor).
Subjects/Keywords: Manufacturing processes – Automation
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APA ·
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APA (6th Edition):
Nagarajan, R. D. (2003). Linking equations for the analysis of a serial automated workstation system. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/32257
Chicago Manual of Style (16th Edition):
Nagarajan, Raghavendran D. “Linking equations for the analysis of a serial automated workstation system.” 2003. Masters Thesis, Oregon State University. Accessed January 23, 2021.
http://hdl.handle.net/1957/32257.
MLA Handbook (7th Edition):
Nagarajan, Raghavendran D. “Linking equations for the analysis of a serial automated workstation system.” 2003. Web. 23 Jan 2021.
Vancouver:
Nagarajan RD. Linking equations for the analysis of a serial automated workstation system. [Internet] [Masters thesis]. Oregon State University; 2003. [cited 2021 Jan 23].
Available from: http://hdl.handle.net/1957/32257.
Council of Science Editors:
Nagarajan RD. Linking equations for the analysis of a serial automated workstation system. [Masters Thesis]. Oregon State University; 2003. Available from: http://hdl.handle.net/1957/32257
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Open Access Theses and Dissertations