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Oregon State University
1.
Brown, Malcolm O.
A process based modeling approach for economic and environmental assessment of nano-assisted manufacturing.
Degree: MS, iin Industrial Engineering, 2011, Oregon State University
URL: http://hdl.handle.net/1957/21941 
► Micro- and nanotechnologies are promising advancements across many industrial sectors, including alternative energy, chemical processing, and healthcare. In particular, a focus of research has been…
(more)
▼ Micro- and nanotechnologies are promising advancements across many industrial sectors, including alternative energy, chemical processing, and healthcare. In particular, a focus of research has been in manufacturing process development aimed at microdevice cost reduction and quality improvement. Microdevices take advantage of enhanced heat and mass transfer to improve energy and material efficiencies, yet device production uncertainties inhibit broad commercialization. Nickel nanoparticle (NiNP) assisted diffusion brazing has been shown to improve bond qualities and reduce processing time in microlaminated stainless steel devices. However, environmental impacts and cost differentials in comparison to conventional techniques remain largely uncertain. A prior life cycle assessment study compared this novel process to a more traditional diffusion brazing approach using nickel phosphorus electroplated laminae. The study found the former to be less environmentally impactful. A major limitation was in the modeling of the NiNPs, which were assumed to be an equivalent mass of bulk nickel. To extend the prior work, this research develops life cycle inventories for NiNP synthesis and undertakes process-based cost modeling encompassing capital investment and cost-of-goods-sold as a function of annual production volume. Several manufacturing process scenarios are explored and compared on both an environmental and economic cost basis for the production of a microchannel air preheater.
Advisors/Committee Members: Haapala, Karl R. (advisor), Lach, Denise (committee member).
Subjects/Keywords: nanotechnology
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APA (6th Edition):
Brown, M. O. (2011). A process based modeling approach for economic and environmental assessment of nano-assisted manufacturing. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/21941
Chicago Manual of Style (16th Edition):
Brown, Malcolm O. “A process based modeling approach for economic and environmental assessment of nano-assisted manufacturing.” 2011. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/21941.
MLA Handbook (7th Edition):
Brown, Malcolm O. “A process based modeling approach for economic and environmental assessment of nano-assisted manufacturing.” 2011. Web. 20 Jan 2021.
Vancouver:
Brown MO. A process based modeling approach for economic and environmental assessment of nano-assisted manufacturing. [Internet] [Masters thesis]. Oregon State University; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/21941.
Council of Science Editors:
Brown MO. A process based modeling approach for economic and environmental assessment of nano-assisted manufacturing. [Masters Thesis]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/21941
Oregon State University
2.
Pandya, Vaibhav.
A methodology for scheduling jobs in a flexible flowshop with sequence dependent setup times and machine skipping.
Degree: MS, Industrial Engineering, 2011, Oregon State University
URL: http://hdl.handle.net/1957/21891
► A flexible flowshop, comprised of one or more stages having unrelated parallel machines, is investigated in this research. Unrelated parallel machines can perform the same…
(more)
▼ A flexible flowshop, comprised of one or more stages having unrelated parallel machines, is investigated in this research. Unrelated parallel machines can perform the same function but have different capacity or capability. Since this problem is motivated by industry research, dynamic job release times and dynamic machine availability times have been considered. Each job considered in this research can have different weight and due date. Sequence-dependent setup times of jobs further add to the complexity of the research. Machine skipping is yet another innate feature of this research that allows jobs to skip one or more stages depending upon customer's demand or budgetary constraints. The objective of this research is to minimize the sum of the weighted tardiness of all jobs released within the planning horizon.
The research problem is modeled as a mixed (binary) integer-linear programming model and is shown to be strictly NP-hard. Being strongly NP-hard, industry size problems cannot be solved using an implicit enumeration technique within a reasonable computation time. Cognizant of the challenges in solving industry-size problems, we use the tabu-search-based heuristic solution algorithm to find optimal/near optimal solutions. Five different initial solution finding mechanisms, based on dispatching rules, have been developed, to initiate the search. The five initial solution finding mechanisms (IS1-IS5) have been used in conjunction with the six tabu-search-based heuristics (TS1-TS6) to
solve the problems in an effective and efficient manner. The applicability of the search algorithm on an example problem has been demonstrated. The tabu-search based heuristics are tested on seven small problems and the quality of their solutions is compared to the optimal solutions obtained by the branch-and-bound technique. The evaluations show that the tabu-search based heuristics are capable of obtaining solutions of good quality within a much shorter computation time. The best performer among these heuristics recorded a percentage deviation of only 2.19%.
The performance of the tabu-search based heuristics is compared by conducting a statistical experiment that is based on a randomized complete block design. Three sizes of problem structures ranging from 9 jobs to 55 jobs are used in the experiment. The results of the experiment suggest that no IS finding mechanism or TS algorithm contributed to identifying a better quality solution (i.e a lower TWT) for all three problem instances (i.e. small, medium and large). In other words, no IS finding mechanism or TS algorithm could statistically outperform others. In absence of a distinct outperformer, TS1 with short-term memory and fixed TLS are recommended for all problem instances. When comparing the efficiency of the search algorithm, the results of the experiment show that IS1, which refers to the EDD (earliest due date) method, is recommended as the initial solution generation method for small problem sizes. The EDD method is capable of obtaining an initial solution that…
Advisors/Committee Members: Logendran, Rasaratnam (advisor), Haapala, Karl (committee member).
Subjects/Keywords: Flexible Flowshop; Production scheduling – Mathematical models
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APA (6th Edition):
Pandya, V. (2011). A methodology for scheduling jobs in a flexible flowshop with sequence dependent setup times and machine skipping. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/21891
Chicago Manual of Style (16th Edition):
Pandya, Vaibhav. “A methodology for scheduling jobs in a flexible flowshop with sequence dependent setup times and machine skipping.” 2011. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/21891.
MLA Handbook (7th Edition):
Pandya, Vaibhav. “A methodology for scheduling jobs in a flexible flowshop with sequence dependent setup times and machine skipping.” 2011. Web. 20 Jan 2021.
Vancouver:
Pandya V. A methodology for scheduling jobs in a flexible flowshop with sequence dependent setup times and machine skipping. [Internet] [Masters thesis]. Oregon State University; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/21891.
Council of Science Editors:
Pandya V. A methodology for scheduling jobs in a flexible flowshop with sequence dependent setup times and machine skipping. [Masters Thesis]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/21891
Oregon State University
3.
Shahvari, Omid.
Bi-Criteria Batching and Scheduling in Hybrid Flow Shops.
Degree: PhD, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61757
► In this research, a bi-criteria batching and scheduling problem is investigated in hybrid flow shop environments, where unrelated-parallel machines are run simultaneously with different capacities…
(more)
▼ In this research, a bi-criteria batching and scheduling problem is investigated in hybrid flow shop environments, where unrelated-parallel machines are run simultaneously with different capacities and eligibilities in processing, in some stages. The objective is to simultaneously minimize a linear combination of the total weighted completion time and total weighted tardiness. The first favors the producer’s interest by minimizing work-in-process inventory, inventory holding cost, and energy consumption as well as maximizing machine utilization, while the second favors the customers’ interest by maximizing customers’ service level and delivery speed. In particular, it disregards the group technology assumptions (GTAs) by allowing for the possibility of splitting pre-determined groups of jobs into inconsistent batches in order to improve the operational efficiency. A comparison between the group scheduling and batch scheduling approaches reveals the outstanding performance of the batch scheduling approach. As a result, contrary to the GTAs, jobs belonging to a group might be processed on more than one machine as batches, but not all machines may be capable of processing all jobs. A sequence- and machine-dependent setup time is required between each of two consecutively scheduled batches belonging to different groups. Based on manufacturing company policy, the desired lower bounds on batch sizes are considered for the number of jobs assigned to batches. Although, the direction in which all jobs move through production line is the same, some jobs may skip some stages. Furthermore, to reflect real industry requirements, the job release times and the machine availability times are considered to be dynamic, which means not all machines and jobs are available at the beginning of the planning horizon.
The problem is formulated with the help of four mixed-integer linear programming (MILP) models. Two out of four MILP models are formulated as two integrated phases, i.e., batching and scheduling phases, with respect to the precedence constraints between each pair of jobs/batches and/or the position concept within batches. The optimal combination between batch compositions of groups are determined in the batching phase, while the optimal assignment and sequence of batches on machines and sequence of jobs within batches are determined in the scheduling phase, with respect to a set of operational constraints. A batch composition of a group corresponding to a particular stage, determined in the batching phase of the MILP model, represents the number of batches assigned to the group as well as the number and type of jobs belonging to each batch of that group. Since the first and second MILP models lead to unmanageable solution space, the relaxed MILP model, which allocates one and only one job to each batch of each group in each stage, can be developed to focus on the non-dominated solution space. The optimal solutions of MILP models and relaxed MILP model are equal, if and only if the optimal solution of the relaxed MILP model does…
Advisors/Committee Members: Logendran, Rasaratnam (advisor), Haapala, Karl (committee member).
Subjects/Keywords: Bi-Criteria Objective
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APA ·
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APA (6th Edition):
Shahvari, O. (2017). Bi-Criteria Batching and Scheduling in Hybrid Flow Shops. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/61757
Chicago Manual of Style (16th Edition):
Shahvari, Omid. “Bi-Criteria Batching and Scheduling in Hybrid Flow Shops.” 2017. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/61757.
MLA Handbook (7th Edition):
Shahvari, Omid. “Bi-Criteria Batching and Scheduling in Hybrid Flow Shops.” 2017. Web. 20 Jan 2021.
Vancouver:
Shahvari O. Bi-Criteria Batching and Scheduling in Hybrid Flow Shops. [Internet] [Doctoral dissertation]. Oregon State University; 2017. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/61757.
Council of Science Editors:
Shahvari O. Bi-Criteria Batching and Scheduling in Hybrid Flow Shops. [Doctoral Dissertation]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61757
Oregon State University
4.
Shahvari, Omid.
Bi-Criteria Batching and Scheduling in Hybrid Flow Shops.
Degree: PhD, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61764
► In this research, a bi-criteria batching and scheduling problem is investigated in hybrid flow shop environments, where unrelated-parallel machines are run simultaneously with different capacities…
(more)
▼ In this research, a bi-criteria batching and scheduling problem is investigated in hybrid flow shop environments, where unrelated-parallel machines are run simultaneously with different capacities and eligibilities in processing, in some stages. The objective is to simultaneously minimize a linear combination of the total weighted completion time and total weighted tardiness. The first favors the producer’s interest by minimizing work-in-process inventory, inventory holding cost, and energy consumption as well as maximizing machine utilization, while the second favors the customers’ interest by maximizing customers’ service level and delivery speed. In particular, it disregards the group technology assumptions (GTAs) by allowing for the possibility of splitting pre-determined groups of jobs into inconsistent batches in order to improve the operational efficiency. A comparison between the group scheduling and batch scheduling approaches reveals the outstanding performance of the batch scheduling approach. As a result, contrary to the GTAs, jobs belonging to a group might be processed on more than one machine as batches, but not all machines may be capable of processing all jobs. A sequence- and machine-dependent setup time is required between each of two consecutively scheduled batches belonging to different groups. Based on manufacturing company policy, the desired lower bounds on batch sizes are considered for the number of jobs assigned to batches. Although, the direction in which all jobs move through production line is the same, some jobs may skip some stages. Furthermore, to reflect real industry requirements, the job release times and the machine availability times are considered to be dynamic, which means not all machines and jobs are available at the beginning of the planning horizon.
The problem is formulated with the help of four mixed-integer linear programming (MILP) models. Two out of four MILP models are formulated as two integrated phases, i.e., batching and scheduling phases, with respect to the precedence constraints between each pair of jobs/batches and/or the position concept within batches. The optimal combination between batch compositions of groups are determined in the batching phase, while the optimal assignment and sequence of batches on machines and sequence of jobs within batches are determined in the scheduling phase, with respect to a set of operational constraints. A batch composition of a group corresponding to a particular stage, determined in the batching phase of the MILP model, represents the number of batches assigned to the group as well as the number and type of jobs belonging to each batch of that group. Since the first and second MILP models lead to unmanageable solution space, the relaxed MILP model, which allocates one and only one job to each batch of each group in each stage, can be developed to focus on the non-dominated solution space. The optimal solutions of MILP models and relaxed MILP model are equal, if and only if the optimal solution of the relaxed MILP model does…
Advisors/Committee Members: Logendran, Rasaratnam (advisor), Haapala, Karl (committee member).
Subjects/Keywords: Batching and Scheduling
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APA ·
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MLA ·
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Manager
APA (6th Edition):
Shahvari, O. (2017). Bi-Criteria Batching and Scheduling in Hybrid Flow Shops. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/61764
Chicago Manual of Style (16th Edition):
Shahvari, Omid. “Bi-Criteria Batching and Scheduling in Hybrid Flow Shops.” 2017. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/61764.
MLA Handbook (7th Edition):
Shahvari, Omid. “Bi-Criteria Batching and Scheduling in Hybrid Flow Shops.” 2017. Web. 20 Jan 2021.
Vancouver:
Shahvari O. Bi-Criteria Batching and Scheduling in Hybrid Flow Shops. [Internet] [Doctoral dissertation]. Oregon State University; 2017. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/61764.
Council of Science Editors:
Shahvari O. Bi-Criteria Batching and Scheduling in Hybrid Flow Shops. [Doctoral Dissertation]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61764
Oregon State University
5.
Zhang, Hao.
A framework for integrating systems thinking into sustainable manufacturing.
Degree: PhD, Industrial Engineering, 2014, Oregon State University
URL: http://hdl.handle.net/1957/54922
► Improving the understanding the relations of sustainability behaviors in manufacturing systems and actively engaging with manufacturers (especially SMEs) in sustainability efforts is key to the…
(more)
▼ Improving the understanding the relations of sustainability behaviors in manufacturing
systems and actively engaging with manufacturers (especially SMEs) in sustainability
efforts is key to the long-term success of U.S. industry and the natural environment. This
study addresses this urgent need by establishing a systemic approach for the design of
costing methods by linking the economic, environmental, and social domains of
sustainable manufacturing with systems thinking principles, and by understanding the
actual sustainability-related behaviors in a metal product manufacturing setting with the
collaboration of a small manufacturer. The proposed system dynamics-based method
identifies sustainability factors and behaviors of the manufacturing system and depicts
their relations across three system levels:, the enterprise level, the shopfloor level, and the
process/operation level. The creative method design approach from the domain of
systems thinking, manages to integrate economic assessment, environmental assessment,
and social assessment methodologies and to quantify the assessment results, which are
embedded in a systems dynamics model. The model, consisting of identified
manufacturing behaviors related to product design modification, environmental impact
control, and process safety improvement, is able to assist decision makers by
demonstrating sustainability performance changes over a determined time period. Based
on the results of this research, U.S. manufacturers will be able to develop systemic
costing approaches towards improving worker well-being, energy efficiency, and cleaner
production at lower cost.
Advisors/Committee Members: Haapala, Karl (advisor), Veltri, Anthony (committee member).
Subjects/Keywords: Sustainable Manufacturing; Manufacturing processes – Environmental aspects – United States
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APA ·
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APA (6th Edition):
Zhang, H. (2014). A framework for integrating systems thinking into sustainable manufacturing. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/54922
Chicago Manual of Style (16th Edition):
Zhang, Hao. “A framework for integrating systems thinking into sustainable manufacturing.” 2014. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/54922.
MLA Handbook (7th Edition):
Zhang, Hao. “A framework for integrating systems thinking into sustainable manufacturing.” 2014. Web. 20 Jan 2021.
Vancouver:
Zhang H. A framework for integrating systems thinking into sustainable manufacturing. [Internet] [Doctoral dissertation]. Oregon State University; 2014. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/54922.
Council of Science Editors:
Zhang H. A framework for integrating systems thinking into sustainable manufacturing. [Doctoral Dissertation]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/54922
Oregon State University
6.
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 ·
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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 20, 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. 20 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 20].
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
7.
Eluri, Ravindranadh T.
Nanoparticle-assisted diffusion brazing of metal microchannel arrays : nanoparticle synthesis, deposition, and characterization.
Degree: PhD, Industrial Engineering, 2012, Oregon State University
URL: http://hdl.handle.net/1957/28651
► Microchannel process technology (MPT) offers several advantages to the field of nanomanufacturing: 1) improved process control over very short time intervals owing to shorter diffusional…
(more)
▼ Microchannel process technology (MPT) offers several advantages to the field of nanomanufacturing: 1) improved process control over very short time intervals owing to shorter diffusional distances; and 2) reduced reactor size due to high surface area to volume ratios and enhanced heat and mass transfer. The objective of this thesis was to consider how nanomaterials, produced in part using MPT, could be used to solve problems associated with the fabrication of MPT devices. Specifically, many MPT devices are produced using transient liquid-phase brazing involving an electroplated interlayer consisting of a brazing alloy designed for melting temperature suppression. Unfortunately, these alloys can form brittle secondary phases which significantly reduce bond strength. In contrast, prior efforts have shown that it is possible to leverage the size-dependent properties of nanomaterials to suppress brazing temperatures. In this prior work, thin films of off-the-shelf elemental nanoparticles were used as interlayers yielding joints with improved mechanical properties.
In the present investigation, efforts have been made to characterize the synthesis and deposition of various elemental nanoparticle suspensions for use in the transient liquid-phase brazing of aluminum and stainless steel. Advances were used to demonstrate the nanoparticle-assisted diffusion brazing of a microchannel array. In the first section, a silver nanoparticle (AgNP) interlayer was produced for the diffusion brazing of heat exchanger aluminum. Efforts are made to examine the effect of braze filler particle size (~5 nm and ~50 nm) and processing parameters (heating rate: 5ºC/min and 25ºC/min; brazing temperature: 550ºC and 570ºC) on thin coupons of diffusion-brazed 3003 Al. A tensile strength of 69.7 MPa was achieved for a sample brazed at 570°C for 30 min under 1 MPa with an interlayer thickness of approximately 7 μm. Further suppression of the brazing temperature to 500ºC was achieved by sputtering a 1 µm thick layer of Cu before depositing a 5 nm thick film of AgNPs resulting in a lap shear strength of 45.3±0.2 MPa. In the middle section of this thesis, several techniques are investigated for the synthesis of sub 10 nm diameter nickel nanoparticles (NiNPs) to be used in the diffusion brazing of 316L stainless steel. The average NiNP size was varied from 9.2 nm to 3.9 nm based on the synthesis technique, solvent and reducing agent used. Conventional wet-chemical synthesis using NiCl₂.6H₂O in ethylene glycol (solvent) and N₂H₄.H₂O (reducing agent) resulted in the formation of 5.4 ± 0.9 nm NiNPs. Continuous flow synthesis using a microchannel T-mixer (barrel diameter of 521µm) and a 10 second residence time of reactants in a bath temperature of 130ºC resulted in a particle size of with 5.3 ± 1 nm. To make the synthesis safer and less energy intense, microwave heating was used along with less toxic Ni(CH₃CO₂)₂·4H₂O (nickel salt), propylene glycol (solvent) and NaPH₂O₂ (reducing agent) yielding 3.9 ± 0.8 nm diameter NiNPs. For the final…
Advisors/Committee Members: Paul, Brian K. (advisor), Haapala, Karl R. (committee member).
Subjects/Keywords: Microchannel Arrays; Diffusion coatings
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APA (6th Edition):
Eluri, R. T. (2012). Nanoparticle-assisted diffusion brazing of metal microchannel arrays : nanoparticle synthesis, deposition, and characterization. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/28651
Chicago Manual of Style (16th Edition):
Eluri, Ravindranadh T. “Nanoparticle-assisted diffusion brazing of metal microchannel arrays : nanoparticle synthesis, deposition, and characterization.” 2012. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/28651.
MLA Handbook (7th Edition):
Eluri, Ravindranadh T. “Nanoparticle-assisted diffusion brazing of metal microchannel arrays : nanoparticle synthesis, deposition, and characterization.” 2012. Web. 20 Jan 2021.
Vancouver:
Eluri RT. Nanoparticle-assisted diffusion brazing of metal microchannel arrays : nanoparticle synthesis, deposition, and characterization. [Internet] [Doctoral dissertation]. Oregon State University; 2012. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/28651.
Council of Science Editors:
Eluri RT. Nanoparticle-assisted diffusion brazing of metal microchannel arrays : nanoparticle synthesis, deposition, and characterization. [Doctoral Dissertation]. Oregon State University; 2012. Available from: http://hdl.handle.net/1957/28651
Oregon State University
8.
Mirkouei, Amin.
Techno-Economic Optimization and Environmental Impact Analysis for a Mixed-Mode Upstream and Midstream Forest Biomass to Bio-Products Supply Chain.
Degree: PhD, Industrial Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59595
► Growing awareness and concern within society over the use of and reliance on fossil fuels has stimulated research efforts in identifying, developing, and selecting alternative…
(more)
▼ Growing awareness and concern within society over the use of and reliance on fossil fuels has stimulated research efforts in identifying, developing, and selecting alternative energy sources and energy technologies. Bioenergy represents a promising replacement for conventional energy, due to reduced environmental impacts and broad applicability. Sustainable energy challenges, however, require innovative manufacturing technologies and practices to mitigate energy and material consumption. This research aims to facilitate sustainable production of bioenergy from forest biomass and to promote deployment of novel processing equipment such as transportable biorefineries. The study integrates knowledge from the renewable energy production and supply chain management disciplines to evaluate economic and environmental targets of bioenergy production with the use of the multi-criteria decision making approach. The presented approach herein includes qualitative and quantitative methods to address the existing challenges and gaps in the bioenergy manufacturing system. The qualitative method employs decision tree analysis to classify the potential biomass harvesting sites, considering biomass quality and availability. The quantitative method proposes mathematical models to optimize the upstream and midstream biomass-tobioenergy supply chain cost, using mixed bio-refinery modes (transportable and fixed) and transportation pathways (traditional and new). The supply chain environmental impacts are assessed by considering the carbon footprint of the harvesting, collection, size reduction, transportation activities, and bio-refinery processing. While transportable bio-refineries are shown to reduce biomass-to-bioenergy supply chain costs, production and deployment of transportable bio-refineries are limited due to operational challenges associated with undeveloped mixed-mode bioenergy supply chains, as well as supply uncertainty. A case study for northwest
Oregon, USA is undertaken using actual data to verify the proposed approach.
Advisors/Committee Members: Haapala, Karl R. (advisor), John, Sessions (committee member).
Subjects/Keywords: Techno-Economic Optimization; Forest biomass
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APA (6th Edition):
Mirkouei, A. (2016). Techno-Economic Optimization and Environmental Impact Analysis for a Mixed-Mode Upstream and Midstream Forest Biomass to Bio-Products Supply Chain. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/59595
Chicago Manual of Style (16th Edition):
Mirkouei, Amin. “Techno-Economic Optimization and Environmental Impact Analysis for a Mixed-Mode Upstream and Midstream Forest Biomass to Bio-Products Supply Chain.” 2016. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/59595.
MLA Handbook (7th Edition):
Mirkouei, Amin. “Techno-Economic Optimization and Environmental Impact Analysis for a Mixed-Mode Upstream and Midstream Forest Biomass to Bio-Products Supply Chain.” 2016. Web. 20 Jan 2021.
Vancouver:
Mirkouei A. Techno-Economic Optimization and Environmental Impact Analysis for a Mixed-Mode Upstream and Midstream Forest Biomass to Bio-Products Supply Chain. [Internet] [Doctoral dissertation]. Oregon State University; 2016. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/59595.
Council of Science Editors:
Mirkouei A. Techno-Economic Optimization and Environmental Impact Analysis for a Mixed-Mode Upstream and Midstream Forest Biomass to Bio-Products Supply Chain. [Doctoral Dissertation]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59595
Oregon State University
9.
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 20, 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. 20 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 20].
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
Oregon State University
10.
Doran, Michael P. (Michael Patrick).
Characterization of Two Novel Machining Processes for Difficult to Machine Materials.
Degree: MS, Mechanical Engineering, 2016, Oregon State University
URL: http://hdl.handle.net/1957/59874
► New materials with superior mechanical properties, such as increased strength and hardness, have been developed to allow for new and improved products. However, the mechanical…
(more)
▼ New materials with superior mechanical properties, such as increased strength and hardness, have been developed to allow for new and improved products. However, the mechanical properties that make these materials useful also makes them difficult to process using conventional methods. New machining processes need to be developed to generate products from these materials. Thus, such processes need to be characterized better understand the process effects on the workpiece.
Characterization of manufacturing processes can be done empirically or mechanistically. In this research, two machining process were investigated to compare the advantages and drawbacks of each characterization method. The first involved electrically-assisted grinding (EAG) of tool steel. In EAG, an electrical spark is generated between a metal-bonded grinding wheel and a workpiece to aid in material removal. An EAG prototype was successfully developed to empirically investigate the effects of current and electricity on hardness, surface roughness, cutting force, and tool wear. Applied current and voltage were found to cause deleterious tool wear, but were found to have no measurable effect on other process attributes.
The second machining process investigated was laser ablation of a technical ceramic. A mechanistic model based on conservation of energy was developed to characterize the process. The model was used to predict depth of cut when fabricating microchannels in silicon carbide. Experiments were conducted to further refine the model, by examining the variance between the model and experimental results. Variance was found to be based on scan speed, with larger variance at low scan speeds and little variance at higher scan speeds. A variance correction term was empirically derived and used to refine the model. Over scan speeds from 100 to 1500 mm/sec and a 100-1000 W power range, the refined model predicted average variation of 9% from experimental data.
Advisors/Committee Members: Haapala, Karl R. (advisor), Albertani, Robert (committee member).
Subjects/Keywords: Difficult-to-Machine Materials; Machining
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APA (6th Edition):
Doran, M. P. (. P. (2016). Characterization of Two Novel Machining Processes for Difficult to Machine Materials. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/59874
Chicago Manual of Style (16th Edition):
Doran, Michael P (Michael Patrick). “Characterization of Two Novel Machining Processes for Difficult to Machine Materials.” 2016. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/59874.
MLA Handbook (7th Edition):
Doran, Michael P (Michael Patrick). “Characterization of Two Novel Machining Processes for Difficult to Machine Materials.” 2016. Web. 20 Jan 2021.
Vancouver:
Doran MP(P. Characterization of Two Novel Machining Processes for Difficult to Machine Materials. [Internet] [Masters thesis]. Oregon State University; 2016. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/59874.
Council of Science Editors:
Doran MP(P. Characterization of Two Novel Machining Processes for Difficult to Machine Materials. [Masters Thesis]. Oregon State University; 2016. Available from: http://hdl.handle.net/1957/59874
Oregon State University
11.
Nagarajan, Hari Prashanth Narayan.
Enabling Design for Energy Efficient Additive Manufacturing.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61718
► Manufacturing exists as a stronghold for continuous growth and development of economies, a trend that is likely to continue as the demand for commodities and…
(more)
▼ Manufacturing exists as a stronghold for continuous growth and development of economies, a trend that is likely to continue as the demand for commodities and products grow. Manufacturing drives innovation and productivity in developed nations, as well as promoting economic stability and development in developing nations. However, manufacturing activities pose a significant demand on the environment (e.g., using resources), which can be accounted for and reduced through the application of sustainable manufacturing principles to analyze and improve the performance of manufacturing systems. Additive manufacturing is a rapidly emerging alternative to conventional manufacturing, including subtractive processes, often attributed to its claim for sustainable product development, e.g., reduced cost, reduced energy and material use, and the distributed production of tailored consumer products. However, these claims remain unsubstantiated for high volume production since benefits are product-specific and vary extensively. Hence, to ensure industrial efficiency with the growth of additive manufacturing, informed design and manufacturing decision making tools integrated with life cycle product and process data are required. Thus, the purpose of this research is to enable energy efficient design for additive manufacturing through 1) cradle-to-gate characterization of the environmental
performance of additive manufacturing processes to identify the key contributors to environmental impacts, 2) characterization and modeling of additive manufacturing process energy use, and 3) development and demonstration of a design decision support tool for evaluation of additively manufactured products and additive manufacturing processes. This research enables systemic characterization of additive manufacturing process inputs and outputs, and associated environmental impacts. Modeling of additive manufacturing process time and energy use was driven by product design and process data and information, and supported the development of a design decision support tool. The tool is capable of informing designers about process energy consumption based on the key interrelationships between design and manufacturing parameters, determined under this research. Underpinning models within the tool encompass four commercially available additive manufacturing processes. This research demonstrates that informed decision making for additive manufacturing can support sustainable product development.
Advisors/Committee Members: Haapala, Karl R. (advisor), Paul, Brian K. (committee member).
Subjects/Keywords: Sustainable Manufacturing
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APA (6th Edition):
Nagarajan, H. P. N. (2017). Enabling Design for Energy Efficient Additive Manufacturing. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61718
Chicago Manual of Style (16th Edition):
Nagarajan, Hari Prashanth Narayan. “Enabling Design for Energy Efficient Additive Manufacturing.” 2017. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/61718.
MLA Handbook (7th Edition):
Nagarajan, Hari Prashanth Narayan. “Enabling Design for Energy Efficient Additive Manufacturing.” 2017. Web. 20 Jan 2021.
Vancouver:
Nagarajan HPN. Enabling Design for Energy Efficient Additive Manufacturing. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/61718.
Council of Science Editors:
Nagarajan HPN. Enabling Design for Energy Efficient Additive Manufacturing. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61718
Oregon State University
12.
Niyaghi, Faraz.
Stability and biological responses of zinc oxide metalworking nanofluids (ZnO MWnF™).
Degree: MS, Industrial Engineering, 2013, Oregon State University
URL: http://hdl.handle.net/1957/48615
► Zinc oxide nanoparticles (ZnO NPs) have demonstrated the ability to improve lubrication and thermal conductivity, and stand as promising metalworking lubricant and coolant additives due…
(more)
▼ Zinc oxide nanoparticles (ZnO NPs) have demonstrated the ability to improve lubrication and thermal conductivity, and stand as promising metalworking lubricant and coolant additives due to their low cost compared to other NPs. While nanomaterials are a focus of research due to their potential to enable advanced technologies, little is known about their effects on the environment and human health. This research investigates two main characteristics of ZnO metalworking nanofluids (MWnF™). First, the stability of ZnO NPs (20nm) is investigated in mixtures of a microemulsion (TRIM® MicroSol® 585XT) and dispersants, all of which are commercially available. Second, toxicological assessments are conducted to survey the effect of ZnO NPs on MWnF™ safety. The results revealed that none of the dispersants enhanced the stability of ZnO NPs more than the prepared microemulsion alone. Research also revealed that ZnO MWnF™ had a significantly higher toxicity than the prepared microemulsion. This demonstrates the need for precautionary development of metalworking nanofluids.
Advisors/Committee Members: Haapala, Karl R. (advisor), Harper, Stacey L. (committee member).
Subjects/Keywords: Nanotoxicology; Nanofluids – Stability
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APA (6th Edition):
Niyaghi, F. (2013). Stability and biological responses of zinc oxide metalworking nanofluids (ZnO MWnF™). (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/48615
Chicago Manual of Style (16th Edition):
Niyaghi, Faraz. “Stability and biological responses of zinc oxide metalworking nanofluids (ZnO MWnF™).” 2013. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/48615.
MLA Handbook (7th Edition):
Niyaghi, Faraz. “Stability and biological responses of zinc oxide metalworking nanofluids (ZnO MWnF™).” 2013. Web. 20 Jan 2021.
Vancouver:
Niyaghi F. Stability and biological responses of zinc oxide metalworking nanofluids (ZnO MWnF™). [Internet] [Masters thesis]. Oregon State University; 2013. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/48615.
Council of Science Editors:
Niyaghi F. Stability and biological responses of zinc oxide metalworking nanofluids (ZnO MWnF™). [Masters Thesis]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/48615
Oregon State University
13.
Seyedmahmoudighomi, Seyedhamed.
Sustainability assessment during early product development : the manufacturing case and the use case.
Degree: MS, Industrial Engineering, 2014, Oregon State University
URL: http://hdl.handle.net/1957/49782
► The research explored in this thesis helps provide a better understanding of efforts that have been undertaken to more precisely calculate environmental impacts and human…
(more)
▼ The research explored in this thesis helps provide a better understanding of efforts that have been undertaken to more precisely calculate environmental impacts and human health risks, such as energy consumption, carbon footprint, and toxicity, to support environmental sustainability assessment of products. The work is comprised of two research objectives, the first research objective explores the integration of the environmental aspect of sustainability performance into the design of common products, manufacturing processes, and relevant supply chain networks to assist decision makers. The second research objective explores the challenges of safety concerns, human health risks, and toxicological responses in developing novel products. The framework developed for the first objective relies on manufacturing and supply chain unit process modeling, and is demonstrated for the evaluation of backpack design variants. It is shown that simultaneous consideration of manufacturing and supply chain processes can impact decision-making and improve product sustainability from an environmental perspective at the design stage. For the second objective, nanomaterials are a focus due to their potential to enable advanced technologies; however, little is known about their effects on the environment and human health. This research builds on a prior investigation of the stability and toxicity characteristics of zinc oxide nanoparticles (ZnO NPs) used in metalworking nanofluids (MWnF™). For stability analysis and toxicological assessment, the dynamic light scattering (DLS) method and the zebrafish assay method are applied, respectively, to evaluate the development of TiO₂ and ZnO MWnF™ formulations. In general, the results reveal addition of these NPs causes a higher mortality rate in comparison to NP-free formulations. From this thesis research, it is concluded that integrating evaluation of sustainable manufacturing and use performance into early product development provides the opportunity for improved engineering decision making. As a contribution, a point of departure is established for the research community to move current efforts forward for concurrent consideration of multiple stages of the product life cycle in pursuit of environmental, economic, and social sustainability. By pursuing this path, future research will ease some of the most challenging recent issues faced by decision makers globally, including use of non-renewable resources, GHG emissions and climate change, human health risks, toxicity, and potential health hazards.
Advisors/Committee Members: Haapala, Karl R. (advisor), Porter, David (committee member).
Subjects/Keywords: New products – Environmental aspects
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APA (6th Edition):
Seyedmahmoudighomi, S. (2014). Sustainability assessment during early product development : the manufacturing case and the use case. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/49782
Chicago Manual of Style (16th Edition):
Seyedmahmoudighomi, Seyedhamed. “Sustainability assessment during early product development : the manufacturing case and the use case.” 2014. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/49782.
MLA Handbook (7th Edition):
Seyedmahmoudighomi, Seyedhamed. “Sustainability assessment during early product development : the manufacturing case and the use case.” 2014. Web. 20 Jan 2021.
Vancouver:
Seyedmahmoudighomi S. Sustainability assessment during early product development : the manufacturing case and the use case. [Internet] [Masters thesis]. Oregon State University; 2014. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/49782.
Council of Science Editors:
Seyedmahmoudighomi S. Sustainability assessment during early product development : the manufacturing case and the use case. [Masters Thesis]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/49782
Oregon State University
14.
Yazdani Sabouni, Mohammad Taghi.
Group scheduling in electronics manufacturing with integration of internal and external setup times.
Degree: PhD, Industrial Engineering, 2014, Oregon State University
URL: http://hdl.handle.net/1957/48952
► This research considers a combinatorial optimization scheduling problem in the assembly of printed circuit boards (PCBs) in electronic manufacturing. For the first time in this…
(more)
▼ This research considers a combinatorial optimization scheduling problem in the assembly of printed circuit boards (PCBs) in electronic manufacturing. For the first time in this research, the preparation process, which is typically called kitting operation, is paid attention to and is performed along with the assembly operation, described in this research as "integrating internal (assembly) and external (kitting) operations". In doing so and as a proposition, the role of kitting staff is completely eliminated and kitting is assigned to be performed by the machine operator when he is idle. In other words, the kitting operation required by the next group is performed by the machine operator during the assembly time of the current group. Unlike all of the traditional research, which assume boards to have static arrival times, a dynamic PCB assembly system is investigated in this research which shares some of the characteristics of just-in-time manufacturing systems. The scheduling objectives comply with the producer and customers' expectations simultaneously by minimizing the weighted flow times and weighted tardiness of boards. Both objectives are highly affected by the arrangements of boards within the groups and the groups themselves. To assemble a group on a machine, a setup operation is required, implying its existence between any two consecutive groups. In contrast to the previous research on PCB manufacturing, the setup dependency is not only on the immediately preceding scheduled group, but also is carried over all throughout the previously scheduled groups, starting with the first group in the sequence. In this setup, namely the carryover sequence-dependent setup, the type and different arrangements of the previously scheduled groups determine different setup times for transferring to the next group.
Given the possibility of considering either a single machine or a multi-machine problem, two different research problems are investigated, respectively, in Phases 1 and 2 of this research. For the problem in Phase 1, a Branch-and-Bound (B&B) algorithm along with a lower bound and an approach to identify repeated solutions are developed. In Phase 2, three mixed-integer linear mathematical programming models, referred to as MILP1, MILP2 and MILP3, that can optimally solve the problem are developed. The research problem being NP-hard in the strong sense, the mathematical models are incapable of optimally solving even medium-size problems. Thus, two very fast and effective heuristics, named CFIM1 and CFIM2 (Cycle Forward Improving Moves), are developed and compared against a version of Tabu Search (TS) algorithm, also developed in this research. Algorithmically evaluating the objective function in the heuristics is an essential part of this research. For this purpose, a very effective decision tree-based algorithm, called OFDT (Objective Function Decision-Tree) that can be integrated with the heuristics is developed.
As evaluating the effectiveness of the heuristics by finding optimal solutions is nearly impossible,…
Advisors/Committee Members: Logendran, Rasaratnam (advisor), Haapala, Karl (committee member).
Subjects/Keywords: PCB Group Scheduling; Printed circuits
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APA (6th Edition):
Yazdani Sabouni, M. T. (2014). Group scheduling in electronics manufacturing with integration of internal and external setup times. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/48952
Chicago Manual of Style (16th Edition):
Yazdani Sabouni, Mohammad Taghi. “Group scheduling in electronics manufacturing with integration of internal and external setup times.” 2014. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/48952.
MLA Handbook (7th Edition):
Yazdani Sabouni, Mohammad Taghi. “Group scheduling in electronics manufacturing with integration of internal and external setup times.” 2014. Web. 20 Jan 2021.
Vancouver:
Yazdani Sabouni MT. Group scheduling in electronics manufacturing with integration of internal and external setup times. [Internet] [Doctoral dissertation]. Oregon State University; 2014. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/48952.
Council of Science Editors:
Yazdani Sabouni MT. Group scheduling in electronics manufacturing with integration of internal and external setup times. [Doctoral Dissertation]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/48952
Oregon State University
15.
Eastwood, Michael D. (Michael David).
Assessing steel bevel gear design alternatives for sustainability performance through unit manufacturing process modeling.
Degree: MS, Mechanical Engineering, 2014, Oregon State University
URL: http://hdl.handle.net/1957/50659
► As the growth in demand for sustainable manufacturing continues, companies must begin to make conscious design decisions with regard to the sustainability of their products.…
(more)
▼ As the growth in demand for sustainable manufacturing continues, companies must begin to make conscious design decisions with regard to the sustainability of their products. This means balancing economics of production with environmental and social performance. Thus, design and manufacturing engineers must consider economic, environmental, and social aspects simultaneously when developing products and process plans. The purpose of this research is to unify unit process-based modeling with sustainability assessment approaches to create a unit manufacturing process-based methodology for product sustainability assessment. Combining these approaches allows for conducting sustainability assessment of components and assemblies at the process level by quantifying a selected set of sustainability metrics. The methodology both improves upon existing approaches in identifying the sustainability impacts of a product and assists manufacturing decision makers. A demonstration of the methodology to assess and compare the sustainability performance of three design alternatives for a bevel gear is presented, first for lightweighting and, second, for improving performance of the induction hardening process through an alloy change. For each bevel gear alternative in the lightweighting demonstration, the findings showed that the turning, vapor degreasing, and cadmium plating processes had the greatest impacts on the sustainability performance. In the induction hardening demonstration, a unit manufacturing process model is constructed and applied to hardening the teeth of a bevel gear made from three different steel alloys to improve the sustainability performance of the process. The model is composed of mathematical equations which are functions of process and component design parameters to quantify the economic, environmental, and social metrics of interest. The findings showed that the electrical resistivity of the steel alloy had the most influence on the sustainability performance of the induction hardening process. The addition of a tempering process is included in the assessment to achieve functional equivalence between the three steel alloys, and it was found to significantly alter the sustainability assessment results. The presented unit process-based sustainability assessment methodology and construction of unit process models can be applied to aid the investigation of tradeoffs during the design decision making process for a wide range of products.
Advisors/Committee Members: Haapala, Karl R. (advisor), Hoyle, Christopher (committee member).
Subjects/Keywords: Gearing; Bevel – Design and construction – Environmental aspects
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APA (6th Edition):
Eastwood, M. D. (. D. (2014). Assessing steel bevel gear design alternatives for sustainability performance through unit manufacturing process modeling. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/50659
Chicago Manual of Style (16th Edition):
Eastwood, Michael D (Michael David). “Assessing steel bevel gear design alternatives for sustainability performance through unit manufacturing process modeling.” 2014. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/50659.
MLA Handbook (7th Edition):
Eastwood, Michael D (Michael David). “Assessing steel bevel gear design alternatives for sustainability performance through unit manufacturing process modeling.” 2014. Web. 20 Jan 2021.
Vancouver:
Eastwood MD(D. Assessing steel bevel gear design alternatives for sustainability performance through unit manufacturing process modeling. [Internet] [Masters thesis]. Oregon State University; 2014. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/50659.
Council of Science Editors:
Eastwood MD(D. Assessing steel bevel gear design alternatives for sustainability performance through unit manufacturing process modeling. [Masters Thesis]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/50659
Oregon State University
16.
Tiwari, Santosh K.
Nickel nanoparticles-assisted diffusion brazing of stainless steel 316 for microfluidic applications.
Degree: PhD, Industrial Engineering, 2010, Oregon State University
URL: http://hdl.handle.net/1957/14996
► Transient liquid-phase diffusion brazing is used in precision, hermetic joining applications as a replacement for diffusion bonding to reduce cycle times, reduce bonding pressure and…
(more)
▼ Transient liquid-phase diffusion brazing is used in precision, hermetic joining applications as a replacement for diffusion bonding to reduce cycle times, reduce bonding pressure and improve yields. Studies showed that the interlayer used in diffusion brazing can be detrimental due to the use of melting point depressants (MPDs). The goal of this study was to investigate the role of nanoparticles and their size distribution in reducing bonding temperature of stainless steel surfaces for Microfluidic applications, as nanoparticles have inherently lower melting point and higher diffusivity than that of their bulk counterpart.
The conventional interlayer has been replaced by a nickel nanoparticle (NiNP) film without any MPDs for diffusion brazing of stainless steel 316L laminae. Brazing was carried out in a uni-axial vacuum hot press at temperatures 750°C, 800°C, 900°C and 1000°C; at a bonding pressure of 10 MPa; at a heating rate of 10°C/min and dwell times of 1 and 2 hrs at each temperature. Comparison among the conventionally diffusion bonded, diffusion brazed and NiNP diffusion brazed samples is made with regard to microstructural evolution, diffusional profile and bond strength. Taken together, the results show that NiNP-assisted diffusion brazed samples have continuous bond line with low void fraction and high shear strength compared to conventionally diffusion bonded and brazed samples. Also, comparing within the NiNP diffusion brazed group, the samples brazed at 900°C have the best results. Effect of particle size on diffusion brazing of stainless steel 316 was also studied with the help of two different sets of nanoparticles (N1: average particle size of 46.7±6.2 nm and N2: average particle size 8.8±0.9 nm. Results showed that the sample brazed with 8.8 nm particles indicated better results with a more homogeneous bondline structure. The findings of this work have positive implications for the economics of NP-assisted diffusion brazing.
Advisors/Committee Members: Paul, Brian K. (advisor), Haapala, Karl (committee member).
Subjects/Keywords: Stainless steel 316; Stainless steel – Brazing
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APA (6th Edition):
Tiwari, S. K. (2010). Nickel nanoparticles-assisted diffusion brazing of stainless steel 316 for microfluidic applications. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/14996
Chicago Manual of Style (16th Edition):
Tiwari, Santosh K. “Nickel nanoparticles-assisted diffusion brazing of stainless steel 316 for microfluidic applications.” 2010. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/14996.
MLA Handbook (7th Edition):
Tiwari, Santosh K. “Nickel nanoparticles-assisted diffusion brazing of stainless steel 316 for microfluidic applications.” 2010. Web. 20 Jan 2021.
Vancouver:
Tiwari SK. Nickel nanoparticles-assisted diffusion brazing of stainless steel 316 for microfluidic applications. [Internet] [Doctoral dissertation]. Oregon State University; 2010. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/14996.
Council of Science Editors:
Tiwari SK. Nickel nanoparticles-assisted diffusion brazing of stainless steel 316 for microfluidic applications. [Doctoral Dissertation]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/14996
Oregon State University
17.
Fisher, Luke W.
Single- and multi-functional arrayed microchannel fluidic devices.
Degree: MS, Mechanical Engineering, 2010, Oregon State University
URL: http://hdl.handle.net/1957/16516
► Novel fluidic devices that utilize an array of microchannels to achieve their designed purpose are discussed. Examples of devices include: fuel reforming using Microreactors, chip…
(more)
▼ Novel fluidic devices that utilize an array of microchannels to achieve their designed purpose are discussed. Examples of devices include: fuel reforming using Microreactors, chip cooling using microchannel heat sinks, and microchannel devices used for biological applications. The devices that have directly contributed to this research include: a microchannel water pasteurizer and a microchannel device for waste heat energy conversion. The water pasteurizer discussion focuses on the design, fabrication, and testing of the device. The design and fabrication of a microchannel boiler (waste heat energy conversion) is also discussed, but the device has not yet been tested. These devices were designed using well-established heat exchanger calculation methods (log mean temperature difference) and fabrication methods (chemical etching and diffusion bonding). The pasteurizer testing returned positive results; the thermal profile matched the predictions and the device was capable of pasteurizing water per the design inputs.
Advisors/Committee Members: Peterson, Richard (advisor), Haapala, Karl (committee member).
Subjects/Keywords: microchannel; Microfluidics
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APA (6th Edition):
Fisher, L. W. (2010). Single- and multi-functional arrayed microchannel fluidic devices. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/16516
Chicago Manual of Style (16th Edition):
Fisher, Luke W. “Single- and multi-functional arrayed microchannel fluidic devices.” 2010. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/16516.
MLA Handbook (7th Edition):
Fisher, Luke W. “Single- and multi-functional arrayed microchannel fluidic devices.” 2010. Web. 20 Jan 2021.
Vancouver:
Fisher LW. Single- and multi-functional arrayed microchannel fluidic devices. [Internet] [Masters thesis]. Oregon State University; 2010. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/16516.
Council of Science Editors:
Fisher LW. Single- and multi-functional arrayed microchannel fluidic devices. [Masters Thesis]. Oregon State University; 2010. Available from: http://hdl.handle.net/1957/16516
Oregon State University
18.
Hires, Clayton Lamar.
Uniform residence time in microreactor-assisted solution deposition of CdS thin-films for CIGS photovoltaic cells.
Degree: MS, Industrial Engineering, 2011, Oregon State University
URL: http://hdl.handle.net/1957/19809
► Photovoltaic (PV) cells have long been an attractive alternative for the consumption of fossil fuels but current manufacturing practices suffer from poor energy efficiency, large…
(more)
▼ Photovoltaic (PV) cells have long been an attractive alternative for the consumption of fossil fuels but current manufacturing practices suffer from poor energy efficiency, large carbon footprints, low material utilization, high processing temperatures and high solvent usage. A critical step in PV production is the deposition of CdS as a thin film to serve as a "buffer layer" between the optically absorbent layer and the transparent conducting oxide (TCO) layer to complete an effective p-n junction.
The development of an inexpensive, low temperature, constant flow deposition process for producing CdS films is investigated. Micro-assisted solution concepts are implemented to promote the selectivity of heterogeneous surface reactions over homogeneous bulk precipitation. Analytical models based off Hagen-Poiseuille equation for fluid flow are coupled with computational fluid dynamic simulations to produce uniform flow fields within the deposition step permitting uniform film coverage on large substrates.
Advisors/Committee Members: Paul, Brian K. (advisor), Haapala, Karl (committee member).
Subjects/Keywords: CdS
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APA (6th Edition):
Hires, C. L. (2011). Uniform residence time in microreactor-assisted solution deposition of CdS thin-films for CIGS photovoltaic cells. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/19809
Chicago Manual of Style (16th Edition):
Hires, Clayton Lamar. “Uniform residence time in microreactor-assisted solution deposition of CdS thin-films for CIGS photovoltaic cells.” 2011. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/19809.
MLA Handbook (7th Edition):
Hires, Clayton Lamar. “Uniform residence time in microreactor-assisted solution deposition of CdS thin-films for CIGS photovoltaic cells.” 2011. Web. 20 Jan 2021.
Vancouver:
Hires CL. Uniform residence time in microreactor-assisted solution deposition of CdS thin-films for CIGS photovoltaic cells. [Internet] [Masters thesis]. Oregon State University; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/19809.
Council of Science Editors:
Hires CL. Uniform residence time in microreactor-assisted solution deposition of CdS thin-films for CIGS photovoltaic cells. [Masters Thesis]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/19809
Oregon State University
19.
Poppa, Kerry Ryan, 1982-.
Theory and application of vector space similarity measures in computer assisted conceptual design.
Degree: PhD, Mechanical Engineering, 2011, Oregon State University
URL: http://hdl.handle.net/1957/22917
► A number of computational tools now exist to aid in developing conceptual solutions based on a functional description of a design problem. A key limitation…
(more)
▼ A number of computational tools now exist to aid in developing conceptual solutions based on a functional description of a design problem. A key limitation of these tools is the way results are organized for presentation to the user. In general, results are an undifferentiated mass of potential solutions. Analysis using a novel concept clustering tool shows concept generator output represents permutations of a set of a few solution archetypes. This provides an initial solution to organizing and presenting the results. More efficient solutions are sought by adopting a generate-evaluate-guide framework from the computational design synthesis literature. Specifically, the concept generation approach is altered so that each generated solution maximizes the variety it adds to the set of solutions. To achieve this, suitable similarity measures must first be developed.
Current techniques for similarity assessment in the design literature tend to be ad hoc and highly specialized to particular tasks. Prior work from the field of information retrieval is applied and extended to create a generalized approach to similarity assessment for vector space design data. These techniques are validated against an existing design by analogy methodology. A new tool for locating functional analogies within a database of existing products is developed as a result.
Improved similarity measures are combined with the proposed computational synthesis framework from literature to modify an existing concept generation tool. The resulting tool efficiently locates the few novel solutions in the set of possible results, and is a key step in the continued evolution of this class of computational design tools.
Advisors/Committee Members: Stone, Robert (advisor), Haapala, Karl (committee member).
Subjects/Keywords: Computational Design Synthesis; Industrial design – Information resources management
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APA (6th Edition):
Poppa, Kerry Ryan, 1. (2011). Theory and application of vector space similarity measures in computer assisted conceptual design. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/22917
Chicago Manual of Style (16th Edition):
Poppa, Kerry Ryan, 1982-. “Theory and application of vector space similarity measures in computer assisted conceptual design.” 2011. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/22917.
MLA Handbook (7th Edition):
Poppa, Kerry Ryan, 1982-. “Theory and application of vector space similarity measures in computer assisted conceptual design.” 2011. Web. 20 Jan 2021.
Vancouver:
Poppa, Kerry Ryan 1. Theory and application of vector space similarity measures in computer assisted conceptual design. [Internet] [Doctoral dissertation]. Oregon State University; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/22917.
Council of Science Editors:
Poppa, Kerry Ryan 1. Theory and application of vector space similarity measures in computer assisted conceptual design. [Doctoral Dissertation]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/22917
Oregon State University
20.
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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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 20, 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. 20 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 20].
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
21.
Sahakian, Misha.
Machining and toxicological performance of a zinc oxide metalworking nanofluid.
Degree: MS, Industrial Engineering, 2011, Oregon State University
URL: http://hdl.handle.net/1957/23778
► Lower production costs are a common goal of many manufacturers as part of their continuous improvement strategies. A large portion of production costs for manufacturers…
(more)
▼ Lower production costs are a common goal of many manufacturers as part of their continuous improvement strategies. A large portion of production costs for manufacturers is the machining of metals to form components. Metal machining is accompanied by friction and heat which is dealt with using metalworking fluids such as coolants and lubricants. Over the past decade, the addition of various nanoparticles has been investigated with the potential of improving a metalworking fluid's properties as a coolant or lubricant.
The addition of zinc oxide nanoparticles as an additive to a semi-synthetic metalworking fluid is investigated. Sodium hexametaphosphate (SHMP) was also used as a surfactant to prevent agglomeration of the nanoparticles. This mixture is termed a metalworking nanofluid (MWnF). A method for measuring the feed, cutting, and radial forces during a turning operation is developed. Machining of an aerospace grade titanium alloy (Ti-6Al-4V) was performed on a lathe. Force data and temperature data were collected in real time for a continuous 30 minute cut representative of a finishing pass. The toxicity of the proposed nanoparticle additives was also assessed using zebrafish assay methods. The results from the work suggest that a 0.5% concentration by weight of zinc oxide nanoparticles yield a significant improvement in cutting forces (up to a 7% reduction) and temperature (up to a 4.6% reduction). While concentrations of zinc oxide nanoparticles used in the MWnF were found to be toxic, dilution of the MWnF to levels of 12.5mg/L ZnO yields a fluid deemed safe via zebrafish assay methods.
Advisors/Committee Members: Haapala, Karl (advisor), Lach, Denise (committee member).
Subjects/Keywords: Machining; Nanofluids
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APA (6th Edition):
Sahakian, M. (2011). Machining and toxicological performance of a zinc oxide metalworking nanofluid. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/23778
Chicago Manual of Style (16th Edition):
Sahakian, Misha. “Machining and toxicological performance of a zinc oxide metalworking nanofluid.” 2011. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/23778.
MLA Handbook (7th Edition):
Sahakian, Misha. “Machining and toxicological performance of a zinc oxide metalworking nanofluid.” 2011. Web. 20 Jan 2021.
Vancouver:
Sahakian M. Machining and toxicological performance of a zinc oxide metalworking nanofluid. [Internet] [Masters thesis]. Oregon State University; 2011. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/23778.
Council of Science Editors:
Sahakian M. Machining and toxicological performance of a zinc oxide metalworking nanofluid. [Masters Thesis]. Oregon State University; 2011. Available from: http://hdl.handle.net/1957/23778
22.
Larson, Tasha M.
Defining and comparing risks and success measures of the reference design process and traditional new product development processes.
Degree: MS, Industrial Engineering, 2014, Oregon State University
URL: http://hdl.handle.net/1957/52814
► To address aggressive global competition, retain customers and increase revenue, firms are required to pursue New Product Development (NPD) projects. Ventures of this nature are…
(more)
▼ To address aggressive global competition, retain customers and increase revenue,
firms are required to pursue New Product Development (NPD) projects. Ventures of
this nature are risky and fail often. Numerous factors influence the survival of a
project. In this research, 16 factors have been identified and selected as indicators of
success. The work involved an industry partner that uses an alternative New Product
Development process not previously documented, termed the Reference Design (RD)
process. Through the use of an exploratory study, interviews with subject matter
experts were conducted to gather information about the Reference Design process.
A comparison between the processes confirms that the Reference Design
process is a form of NPD. The RD process involves two firms to complete the
process; one firm provides a design and essential subcomponents to another firm that
manufactures the product. It is also found that the RD process is driven by the same
factors that drive a traditional NPD process. These findings offer the RD process as
an alternative solution to introducing to market a new product.
Advisors/Committee Members: Eseonu, Chinweike (advisor), Haapala, Karl (committee member).
Subjects/Keywords: new product development; New products – Economic aspects
…DEVELOPMENT
PROCESS
Authors
Tasha M. Larson, Chinweike I. Eseonu and Karl R. Haapala
Oregon State… …University
School of Mechanical, Industrial and Manufacturing Engineering
To be submitted to a…
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APA (6th Edition):
Larson, T. M. (2014). Defining and comparing risks and success measures of the reference design process and traditional new product development processes. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/52814
Chicago Manual of Style (16th Edition):
Larson, Tasha M. “Defining and comparing risks and success measures of the reference design process and traditional new product development processes.” 2014. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/52814.
MLA Handbook (7th Edition):
Larson, Tasha M. “Defining and comparing risks and success measures of the reference design process and traditional new product development processes.” 2014. Web. 20 Jan 2021.
Vancouver:
Larson TM. Defining and comparing risks and success measures of the reference design process and traditional new product development processes. [Internet] [Masters thesis]. Oregon State University; 2014. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/52814.
Council of Science Editors:
Larson TM. Defining and comparing risks and success measures of the reference design process and traditional new product development processes. [Masters Thesis]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/52814
23.
Gao, Qi.
An economic and environmental assessment model for microchannel device manufacturing.
Degree: MS, Industrial Engineering, 2013, Oregon State University
URL: http://hdl.handle.net/1957/44921
► A key application of microchannel process technology (MPT) is its implementation in heat exchanger devices, since a larger surface contact area can be realized than…
(more)
▼ A key application of microchannel process technology (MPT) is its implementation in heat exchanger devices, since a larger surface contact area can be realized than in conventional approaches, thus achieving high heat transfer efficiency. To justify high volume production of configurations validated as prototypes, and to select from among the plethora of manufacturing techniques according to sustainable manufacturing requirements, an evaluation of the manufacturing economics and environmental impacts is needed. A spreadsheet-based economic and environmental impact assessment model is thus developed for microchannel device manufacturing. Bottom-up process-based cost calculation and the process-based cradle-to-gate life cycle assessment methods are integrated in this model to evaluate the manufacturing cost and environmental impacts for microchannel devices at a range of production volumes. A graphical user interface allows decision makers to manipulate the model by modifying various production and device geometry parameters. This model provides users a more comprehensive understanding of the composition of manufacturing costs and environmental impacts, thus providing quantitative support for selecting MPT manufacturing strategies. A case study is given to demonstrate the analysis of cost and environmental impacts of several microchannel device manufacturing scenarios with this model.
Advisors/Committee Members: Haapala, Karl (advisor), Funk, Kenneth (committee member).
Subjects/Keywords: Bottom-up cost modeling; Microreactors – Design and construction – Economic aspects
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APA (6th Edition):
Gao, Q. (2013). An economic and environmental assessment model for microchannel device manufacturing. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/44921
Chicago Manual of Style (16th Edition):
Gao, Qi. “An economic and environmental assessment model for microchannel device manufacturing.” 2013. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/44921.
MLA Handbook (7th Edition):
Gao, Qi. “An economic and environmental assessment model for microchannel device manufacturing.” 2013. Web. 20 Jan 2021.
Vancouver:
Gao Q. An economic and environmental assessment model for microchannel device manufacturing. [Internet] [Masters thesis]. Oregon State University; 2013. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/44921.
Council of Science Editors:
Gao Q. An economic and environmental assessment model for microchannel device manufacturing. [Masters Thesis]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/44921
24.
Brannon, Samuel T.
Development of an economical high temperature microchannel recuperator for solid oxide fuel cells.
Degree: MS, Industrial Engineering, 2013, Oregon State University
URL: http://hdl.handle.net/1957/40402
► To improve the performance of solid oxide fuel cells, a secondary power cycle can be driven by the recuperation of exhaust gas heat. Microchannel recuperators…
(more)
▼ To improve the performance of solid oxide fuel cells, a secondary power cycle can be driven by the recuperation of exhaust gas heat. Microchannel recuperators are attractive for waste heat recuperation due to compact form factors which also minimize the mass of the expensive superalloys required. This paper introduces a new microchannel lamination architecture with the potential to further reduce the cost of high temperature microchannel recuperators. The design consists of a two fluid counterflow microchannel array containing alternating high and low pressure channels made from a high temperature nickel alloy. High pressure microchannels are hermetically sealed by laser welding. Low pressure microchannels contain microchannel flow inserts in the form of micro-scale pyramidal truss networks that prevent the channels from collapsing during operation. A clamshell housing is used to encapsulate the array and provide headering for the low pressure channels. To demonstrate the feasibility of the new microchannel lamination architecture, a sub-scale heat exchanger was designed and fabricated. Functional testing of the device shows a heat exchanger effectiveness of 52% with a pressure drop of 8.7 [kPa] through the low pressure side at a Reynolds number similar to that needed for the full-scale device. Based on our results, a full-scale design is proposed that uses 25% the raw material as the conventional design leading to an estimated cost reduction of over fourfold.
Advisors/Committee Members: Paul, Brian K. (advisor), Haapala, Karl R. (committee member).
Subjects/Keywords: Microchannel Recuperator; Microreactors – Design and construction
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APA (6th Edition):
Brannon, S. T. (2013). Development of an economical high temperature microchannel recuperator for solid oxide fuel cells. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/40402
Chicago Manual of Style (16th Edition):
Brannon, Samuel T. “Development of an economical high temperature microchannel recuperator for solid oxide fuel cells.” 2013. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/40402.
MLA Handbook (7th Edition):
Brannon, Samuel T. “Development of an economical high temperature microchannel recuperator for solid oxide fuel cells.” 2013. Web. 20 Jan 2021.
Vancouver:
Brannon ST. Development of an economical high temperature microchannel recuperator for solid oxide fuel cells. [Internet] [Masters thesis]. Oregon State University; 2013. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/40402.
Council of Science Editors:
Brannon ST. Development of an economical high temperature microchannel recuperator for solid oxide fuel cells. [Masters Thesis]. Oregon State University; 2013. Available from: http://hdl.handle.net/1957/40402
25.
Choothian, Woraruthai.
A study of the application of lean practices to new product development processes.
Degree: PhD, Industrial Engineering, 2014, Oregon State University
URL: http://hdl.handle.net/1957/54642
► The application of lean to new product development (NPD) processes has been claimed to generate positive impact on NPD performance. There are very few empirical…
(more)
▼ The application of lean to new product development (NPD) processes has been claimed to generate positive impact on NPD performance. There are very few empirical studies, however, on how organizations should apply lean practices or on the exact nature of the impact of lean on NPD performance. To further understand how the application of lean can improve NPD performance, additional empirical studies are needed. This research was designed to gain a better understanding of how organizations can apply lean to improve NPD processes. The objectives of this research were (1) to identify common practices used to apply lean to NPD processes, (2) to identify performance indicators used to evaluate NPD process performance and the impact of applying lean on NPD process performance improvement, (3) to identify challenges faced by organizations in applying lean to NPD, (4) to study whether or not there was a relationship between the number of practices used and NPD process performance, and (5) to study whether or not there was a relationship between years of experience with lean and NPD process performance.
Eight hypotheses were developed to support the research objectives. An internet survey was created to collect data to test the eight hypotheses. Fifty-eight organizations completed the survey. Of the 58 responding organizations, only 27 had applied lean to NPD. Following analyses of the data, five findings, related to the research objectives, are of particular note. First, the results indicated that all fourteen practices included on the survey were useful in applying lean to NPD. Since the practices included on the survey were a mix of lean and more traditional continuous improvement practices, these findings suggest that organizations can use a variety of practices, and are not limited to only lean practices, when applying lean principles to NPD.
Second, the research results also suggest that organizations can use a wide range of performance indicators to evaluate NPD process performance after implementing lean. The results also confirmed that the application of lean practices generally produced positive impacts on NPD process performance, as measured by time, cost, and quality performance indicators.
Third, all six challenges proposed in this research were experienced by the organizations included in this study during their lean implementations in NPD. The lack of management commitment and support and unsupportive organizational culture were two challenges that were identified as barriers to applying lean in NPD.
Fourth, the results indicated that there was no relationship between the number of practices used and NPD process performance, as measured by time, cost, and quality performance indicators. Although organizations made an effort to use a variety of practices to support all lean principles, NPD performance improvement does not appear to increase as the number of practices used increased.
Fifth, there was an inverse relationship between years of experience with lean and NPD process…
Advisors/Committee Members: Doolen, Toni L. (advisor), Haapala, Karl (committee member).
Subjects/Keywords: Lean new product development; Lean manufacturing – Evaluation
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APA (6th Edition):
Choothian, W. (2014). A study of the application of lean practices to new product development processes. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/54642
Chicago Manual of Style (16th Edition):
Choothian, Woraruthai. “A study of the application of lean practices to new product development processes.” 2014. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/54642.
MLA Handbook (7th Edition):
Choothian, Woraruthai. “A study of the application of lean practices to new product development processes.” 2014. Web. 20 Jan 2021.
Vancouver:
Choothian W. A study of the application of lean practices to new product development processes. [Internet] [Doctoral dissertation]. Oregon State University; 2014. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/54642.
Council of Science Editors:
Choothian W. A study of the application of lean practices to new product development processes. [Doctoral Dissertation]. Oregon State University; 2014. Available from: http://hdl.handle.net/1957/54642
26.
Lajevardi, Babak.
Energy Analysis of Novel Data Center Cooling Technology : Evaporative Cooling System Operation and Microchannel Heat Exchanger Manufacturing.
Degree: PhD, Industrial Engineering, 2015, Oregon State University
URL: http://hdl.handle.net/1957/56162
► Worldwide, many organizations are pursuing higher energy efficiency by reducing power consumption of their processes, systems, and supporting infrastructure. The rapid growth of the information…
(more)
▼ Worldwide, many organizations are pursuing higher energy efficiency by reducing power consumption of their processes, systems, and supporting infrastructure. The rapid growth of the information technology (IT) industry and the miniaturization of semiconductors have resulted in substantial increases in energy consumption and power density of IT equipment, and, subsequently, heat generated by data center equipment contained within data center racks. Energy efficiency and thermal management effectiveness are two major issues facing data centers due to increases in heat dissipated from data center racks. Higher data center energy efficiency will lower total cost of ownership (TCO) and enable organizations to better manage increasing computing and network demands. To improve data center energy efficiency, efforts have been focused on novel center-level and rack-level cooling technologies to remove the heat generated by high-density servers. The research presented herein investigates the operational energy performance of a data center evaporative cooling system and the manufacturing energy requirements for a server-scale microchannel heat exchanger (MCHX). Energy monitoring and analysis was conducted to evaluate an evaporative cooling system installed at a data center located in Gresham, OR. A holistic metric and measurement approach is developed to evaluate the impact of changes for data center infrastructure and information technology (IT) equipment. It was found that the developed metric is more responsive to changes in cooling power and environmental conditions than commonly used metrics. Further, the evaporative cooling technology was shown to be more efficient and effective than conventional cooling technology. Liquid cooling has been demonstrated as an effective strategy to provide a reliable environment for servers and to reduce the load on conventional cooling systems. While microchannel process technology (MPT)-based devices offer a space-efficient approach to liquid cooling of high-density servers, MPT device manufacturing, in particular device patterning and bonding, has been shown to be energy intensive. A weld depth model for bonding of MPT devices is developed and used to understand the capabilities and limitations of the laser welding process. Energy analysis is conducted for the production of a MCHX device to liquid cool the warm exiting air from server racks. Analysis of the patterning, photochemical machining (PCM), and bonding, diffusion bonding and laser welding, processes revealed a considerable reduction in cumulative energy demand (CED) and global warming potential (GWP) when laser welding is used in place of diffusion bonding. This environmental impact reduction was due to reduced process time, reduced energy use, and improved process yield.
Advisors/Committee Members: Haapala, Karl R. (advisor), Porter, David (committee member).
Subjects/Keywords: Heat exchangers – Design and construction
…Manufacturing Engineering
Oregon State University
This chapter appeared in:
Journal of Manufacturing… …the updated file to a local drive, send a copy to the
Oregon State University Energy… …Efficiency Center via email, and save a copy to an Oregon State
University FTP address every 24…
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APA (6th Edition):
Lajevardi, B. (2015). Energy Analysis of Novel Data Center Cooling Technology : Evaporative Cooling System Operation and Microchannel Heat Exchanger Manufacturing. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/56162
Chicago Manual of Style (16th Edition):
Lajevardi, Babak. “Energy Analysis of Novel Data Center Cooling Technology : Evaporative Cooling System Operation and Microchannel Heat Exchanger Manufacturing.” 2015. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/56162.
MLA Handbook (7th Edition):
Lajevardi, Babak. “Energy Analysis of Novel Data Center Cooling Technology : Evaporative Cooling System Operation and Microchannel Heat Exchanger Manufacturing.” 2015. Web. 20 Jan 2021.
Vancouver:
Lajevardi B. Energy Analysis of Novel Data Center Cooling Technology : Evaporative Cooling System Operation and Microchannel Heat Exchanger Manufacturing. [Internet] [Doctoral dissertation]. Oregon State University; 2015. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/56162.
Council of Science Editors:
Lajevardi B. Energy Analysis of Novel Data Center Cooling Technology : Evaporative Cooling System Operation and Microchannel Heat Exchanger Manufacturing. [Doctoral Dissertation]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/56162
27.
Paulraj, Prawin.
Adhesive microlamination protocol for low-temperature microchannel arrays.
Degree: PhD, Industrial Engineering, 2012, Oregon State University
URL: http://hdl.handle.net/1957/28339
► A new adhesive bonding method is introduced for microlamination architectures, for producing low-temperature microchannel arrays in a wide variety of metals. Sheet metal embossing and…
(more)
▼ A new adhesive bonding method is introduced for microlamination architectures, for producing low-temperature microchannel arrays in a wide variety of metals. Sheet metal embossing and chemical etching processes have been used to produce sealing bosses and flow features, resulting in approximately 50% fewer laminae over traditional methods. These lamina designs are enabled by reduced bonding pressures required for the new method. An assembly process using adhesive dispense and cure is outlined to produce leak-free devices. Feasible fill ratios were determined to be 1.1 in general and 1.25 around fluid headers, largely due to gaps between faying surfaces caused by surface roughness. Bond strength investigation reveals robustness to surface conditions and a bond strength of 5.5-8.5 MPa using a 3X safety factor. Dimensional characterization reveals a two sigma (95%) post-bonded channel height tolerance under 10% (9.6%) after bonding. Patterning tolerance and surface roughness of the faying laminae were found to have a significant influence on the final postbonded channel height. Leakage and burst pressure testing on several samples has established confidence that adhesive bonding can produce leak-free joints. Operating pressures up to 413 kPa have been satisfied, equating to tensile pressure on bond joints of 1.9 MPa. Higher operating pressures can be accommodated by increasing the bond area of devices. A two-fluid counterflow microchannel heat exchanger has been redesigned, fabricated and tested to demonstrate feasibility of the new method. Results show greater effectiveness and higher heat transfer rates, suggesting a smaller device than the original heat exchanger. A maximum effectiveness of 82.5% was achieved with good agreement between theoretical and experimental values. Although thermal performance was improved, higher pressure drops were noted. Pressure drops were predicted with a maximum error of 16% between theoretical and experimental values. Much of the pressure drop was found to be in the device manifolds, which can be improved in subsequent designs. Fluid flow simulation results show a 45-65X reduction in fluid leakage velocity past sealing bosses, thereby mitigating adhesive erosion concerns. Theoretical models indicate that the worst-case adhesive erosion rate is 1/12th the rate of aluminum and 1/7th the rate of stainless steel, implying satisfactory reliability in high fluid velocity applications. Economic comparison indicates an 83% reduction in material cost and 71% reduction in assembly cost with the new adhesive bonding process, when compared to diffusion bonding for the recuperator investigated in this study. Adhesive compatibility with common refrigerants is reviewed through literature references, with no adverse compatibility issues noted. The findings of this research suggest a fairly quick path to commercialization for the new bonding method. Future studies required to pursue commercialization are liquid and gas permeability evaluations, and long term strength and performance testing of…
Advisors/Committee Members: Paul, Brian K. (advisor), Haapala, Karl (committee member).
Subjects/Keywords: Adhesive Bonding; Microlamination
…Engineering
Oregon State University Corvallis OR 97331
E-mail: [email protected]
Journal of…
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APA (6th Edition):
Paulraj, P. (2012). Adhesive microlamination protocol for low-temperature microchannel arrays. (Doctoral Dissertation). Oregon State University. Retrieved from http://hdl.handle.net/1957/28339
Chicago Manual of Style (16th Edition):
Paulraj, Prawin. “Adhesive microlamination protocol for low-temperature microchannel arrays.” 2012. Doctoral Dissertation, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/28339.
MLA Handbook (7th Edition):
Paulraj, Prawin. “Adhesive microlamination protocol for low-temperature microchannel arrays.” 2012. Web. 20 Jan 2021.
Vancouver:
Paulraj P. Adhesive microlamination protocol for low-temperature microchannel arrays. [Internet] [Doctoral dissertation]. Oregon State University; 2012. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/28339.
Council of Science Editors:
Paulraj P. Adhesive microlamination protocol for low-temperature microchannel arrays. [Doctoral Dissertation]. Oregon State University; 2012. Available from: http://hdl.handle.net/1957/28339
28.
Alsaffar, Ahmed J.
Process-based modeling for cradle-to-gate energy and carbon footprint reduction in product design.
Degree: MS, Industrial Engineering, 2012, Oregon State University
URL: http://hdl.handle.net/1957/28609
► Interest in accounting for environmental impacts of products, processes, and systems during the design phase is increasing. Numerous studies have undertaken investigations for reducing environmental…
(more)
▼ Interest in accounting for environmental impacts of products, processes, and systems during the design phase is increasing. Numerous studies have undertaken investigations for reducing environmental impacts across the product life cycle. Efforts have also been launched to quantify such impacts more accurately. Life cycle energy consumption and carbon footprint are among the most frequently adopted and investigated environmental performance metrics. As efforts continue to incorporate environmental sustainability into product design, struggles persist in concurrent consideration of environmental impacts resulting from the manufacturing processes and supply chain network design. Thus, the objective of this research is to present a framework for reducing product cradle-to-gate energy consumption and carbon footprint through simultaneous consideration of manufacturing processes and supply
chain activities. The framework developed in this thesis relies on unit process modeling, and is demonstrated for production of a bicycle pedal. It is shown that simultaneous consideration of manufacturing and supply chain processes can impact decision-making and improve product environmental sustainability at the design stage. The work presented contributes to the
state of the science in sustainable design and manufacturing research. In addition, a point of departure is established for the research community to move current efforts forward for concurrent consideration of multiple stages of the product life cycle in pursuit of environmental, economic, and social sustainability.
Advisors/Committee Members: Haapala, Karl R. (advisor), Zhaohui, Wu (committee member).
Subjects/Keywords: Sustainability; Product design – Environmental aspects
…Oregon State University, I
have acquired new knowledge and skills that have conferred me with a… …manufacturing process analysis at Oregon State
University. Furthermore, data and process models were…
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APA ·
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APA (6th Edition):
Alsaffar, A. J. (2012). Process-based modeling for cradle-to-gate energy and carbon footprint reduction in product design. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/28609
Chicago Manual of Style (16th Edition):
Alsaffar, Ahmed J. “Process-based modeling for cradle-to-gate energy and carbon footprint reduction in product design.” 2012. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/28609.
MLA Handbook (7th Edition):
Alsaffar, Ahmed J. “Process-based modeling for cradle-to-gate energy and carbon footprint reduction in product design.” 2012. Web. 20 Jan 2021.
Vancouver:
Alsaffar AJ. Process-based modeling for cradle-to-gate energy and carbon footprint reduction in product design. [Internet] [Masters thesis]. Oregon State University; 2012. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/28609.
Council of Science Editors:
Alsaffar AJ. Process-based modeling for cradle-to-gate energy and carbon footprint reduction in product design. [Masters Thesis]. Oregon State University; 2012. Available from: http://hdl.handle.net/1957/28609
29.
Chongvilaiwan, Tanida.
A Theoretical Framework to Capture Stakeholders' Perspectives for the Design of Collaborative Communication Structures for Specialized Organizations.
Degree: MS, Industrial Engineering, 2015, Oregon State University
URL: http://hdl.handle.net/1957/56247
► Small business energy analysts often specialize in one aspect of the business. This specialized focus is done by necessity due to scarcity of resources and…
(more)
▼ Small business energy analysts often specialize in one aspect of the business. This specialized focus is done by necessity due to scarcity of resources and to maintain a proprietary market niche. However, this specialized focus results in a growth inhibitor due to their lack of ability to address all the potential client's needs. Moving to a multiple entity collaborative approach can provide a competitive advantage. Yet, interacting with multiple entities that do not communicate with each other well can be dysfunctional and unsatisfying for themselves and most importantly for clients. When multiple interests and beliefs are in place, soft systems methodology (SSM) can assist leaders to find the "middle" ground for all participants to collaborate. However, SSM is based on the observer doing all the design work, a feature not desirable when designing collaborative structures. In this research, a participative version of Soft Systems Methodology for energy analysis was developed. The resulting version is capable of assisting collaborative specialized organization's leaders in the design of communication structures to coordinate collaborative efforts.
Advisors/Committee Members: Calvo-Amodio, Javier (advisor), Haapala, Karl (committee member).
Subjects/Keywords: Soft System Methodology; Business communication
…structure of
the E3 at the Energy Efficiency Center (EEC) at Oregon State University…
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APA (6th Edition):
Chongvilaiwan, T. (2015). A Theoretical Framework to Capture Stakeholders' Perspectives for the Design of Collaborative Communication Structures for Specialized Organizations. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/56247
Chicago Manual of Style (16th Edition):
Chongvilaiwan, Tanida. “A Theoretical Framework to Capture Stakeholders' Perspectives for the Design of Collaborative Communication Structures for Specialized Organizations.” 2015. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/56247.
MLA Handbook (7th Edition):
Chongvilaiwan, Tanida. “A Theoretical Framework to Capture Stakeholders' Perspectives for the Design of Collaborative Communication Structures for Specialized Organizations.” 2015. Web. 20 Jan 2021.
Vancouver:
Chongvilaiwan T. A Theoretical Framework to Capture Stakeholders' Perspectives for the Design of Collaborative Communication Structures for Specialized Organizations. [Internet] [Masters thesis]. Oregon State University; 2015. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/56247.
Council of Science Editors:
Chongvilaiwan T. A Theoretical Framework to Capture Stakeholders' Perspectives for the Design of Collaborative Communication Structures for Specialized Organizations. [Masters Thesis]. Oregon State University; 2015. Available from: http://hdl.handle.net/1957/56247
30.
Eastlick, Dane, 1985-.
Assisting decision making in component design for sustainable manufacturing.
Degree: MS, Mechanical Engineering, 2012, Oregon State University
URL: http://hdl.handle.net/1957/28567
► Current life cycle assessment tools are often deficient in assisting design for sustainable manufacturing efforts. Integrating an improved assessment method into a decision support framework…
(more)
▼ Current life cycle assessment tools are often deficient in assisting design for sustainable manufacturing efforts. Integrating an improved assessment method into a decision support framework will provide a means for designers and engineers to better understand the impacts of their decisions. A unit process modeling-based sustainability assessment method is presented to assist design decision making by accounting for and quantifying economic, environmental, and social attributes. A set of these sustainability metrics is defined as a basis for comparison of component design alternatives. The method is demonstrated using two titanium component production alternatives that represent typical design for manufacturing scenarios. The modeling method significantly increases the resolution of sustainable manufacturing metrics over conventional assessment techniques, and is one aspect of the overall decision support framework developed. Additionally, fixed sum importance weighting, weighted sum modeling, and scenario analysis were selected as easily employed and transparent design decision techniques to provide the remaining elements of the framework. The demonstration of the decision support framework for titanium component manufacturing illustrates that the sequential approach developed can assist engineers in developing more sustainable components and products.
Advisors/Committee Members: Haapala, Karl R. (advisor), Hoyle, Chris (committee member).
Subjects/Keywords: sustainable manufacturing; Manufacturing processes – Environmental aspects – Decision making
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APA ·
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APA (6th Edition):
Eastlick, Dane, 1. (2012). Assisting decision making in component design for sustainable manufacturing. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/28567
Chicago Manual of Style (16th Edition):
Eastlick, Dane, 1985-. “Assisting decision making in component design for sustainable manufacturing.” 2012. Masters Thesis, Oregon State University. Accessed January 20, 2021.
http://hdl.handle.net/1957/28567.
MLA Handbook (7th Edition):
Eastlick, Dane, 1985-. “Assisting decision making in component design for sustainable manufacturing.” 2012. Web. 20 Jan 2021.
Vancouver:
Eastlick, Dane 1. Assisting decision making in component design for sustainable manufacturing. [Internet] [Masters thesis]. Oregon State University; 2012. [cited 2021 Jan 20].
Available from: http://hdl.handle.net/1957/28567.
Council of Science Editors:
Eastlick, Dane 1. Assisting decision making in component design for sustainable manufacturing. [Masters Thesis]. Oregon State University; 2012. Available from: http://hdl.handle.net/1957/28567
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Open Access Theses and Dissertations
