subject:(Engineering mechanics)

University of Arizona

1. Kumar Yadav, Susheel. Damage Detection and Characterization in Plate Like Structures .

Degree: 2013, University of Arizona

► Large civil infrastructure systems all over the world have become an integral part of our civilization. The inspection and maintenance of these structures for public… (more)

▼ Large civil infrastructure systems all over the world have become an integral part of our civilization. The inspection and maintenance of these structures for public safety is a difficult task. The assessment of integrity of such huge structures due to local damages is even more difficult to deal with. The conventional inspections are performed manually, generally by visual examination and sometimes by more advanced techniques like ultrasonic, electromagnetic and fiber optic techniques. These inspections involve human interventions, depend on individual inspector's experience, and are time consuming. Such inspection methods may not be very useful for real time health assessment of a structure in service and as a result are not very helpful in preventing any disastrous situation through early warning. Therefore, it is very important to look for a comprehensive strategy of global integrity monitoring infused with information about local damages in the structure. For local damage assessment the current state of the health monitoring technology lacks a generalized and definitive approach to the identification and localization of damage. In past decades several signal processing tools have been used for solving different health monitoring problems but the commutability of the tools between different problems has been restricted. Fundamental reasons for this shortcoming have never been investigated in detail. In this dissertation an investigation has been carried out employing almost all promising feature extraction tools on a representative problem - a plate with rivet holes. The problem considered has radial cracks around rivet holes in a joint panel of a steel truss bridge. Such defects are very difficult to detect. Although well established, Lamb wave based nondestructive evaluation techniques are revisited and new tools are developed to address this issue. Simulation of the scattered ultrasonic wave field is carried out using the finite element method. This ultrasonic wave field is further analyzed to evaluate the integrity of the structure using various feature extraction (FE) techniques. Joint time-frequency-energy representation is obtained from ultrasonic signals recorded at various locations on the plate (joint panel) and used to extract damage sensitive features. Those features were then used to formulate a new Damage Parameter (DP) for better visualization of the crack. Results are shown to demonstrate the comparative effectiveness of these techniques. It is concluded that any particular FE technique cannot detect all possible sizes and orientations of the crack. It is suggested that the statistical occurrence and pattern of the crack must be visualized through a few selective FE techniques in a sequence. Modeling of the wave scattering phenomenon by conventional numerical techniques such as finite element method requires very fine mesh at high frequencies necessitating heavy computational power. Distributed point source method (DPSM) which is a recently developed semi-analytical technique, is applied to model… Advisors/Committee Members: Kundu, Tribikram (advisor), Kundu, Tribikram (committeemember), Banerjee, Sourav (committeemember), Frantziskonis, George (committeemember), Lansey, Kevin (committeemember).

Subjects/Keywords: Engineering Mechanics

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APA (6^th Edition):

Kumar Yadav, S. (2013). Damage Detection and Characterization in Plate Like Structures . (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/306997

Chicago Manual of Style (16^th Edition):

Kumar Yadav, Susheel. “Damage Detection and Characterization in Plate Like Structures .” 2013. Doctoral Dissertation, University of Arizona. Accessed February 28, 2021. http://hdl.handle.net/10150/306997.

MLA Handbook (7^th Edition):

Kumar Yadav, Susheel. “Damage Detection and Characterization in Plate Like Structures .” 2013. Web. 28 Feb 2021.

Vancouver:

Kumar Yadav S. Damage Detection and Characterization in Plate Like Structures . [Internet] [Doctoral dissertation]. University of Arizona; 2013. [cited 2021 Feb 28]. Available from: http://hdl.handle.net/10150/306997.

Council of Science Editors:

Kumar Yadav S. Damage Detection and Characterization in Plate Like Structures . [Doctoral Dissertation]. University of Arizona; 2013. Available from: http://hdl.handle.net/10150/306997

University of California – Berkeley

2. Mukherjee, Debanjan. Discrete Particle Simulation Techniques for the Analysis of Colliding and Flowing Particulate Media.

Degree: Mechanical Engineering, 2013, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/4d05s5ss

► Flowing particulate media are ubiquitous in a wide spectrum of applications that include transport systems, fluidized beds, manufacturing and materials processing technologies, energy conversion and… (more)

▼ Flowing particulate media are ubiquitous in a wide spectrum of applications that include transport systems, fluidized beds, manufacturing and materials processing technologies, energy conversion and propulsion technologies, sprays, jets, slurry flows, and biological flows. The discrete nature of the media, along with their underlying coupled multi-physical interactions can lead to a variety of interesting phenomena, many of which are unique to such media - for example, turbulent diffusion and preferential concentration in particle laden flows, and soliton like excitation patterns in a vibrated pile of granular material. This dissertation explores the utility of numerical simulations based on the discrete element method and collision driven particle dynamics methods for analyzing flowing particulate media. Such methods are well-suited to handle phenomena involving particulate, granular, and discontinuous materials, and often provide abilities to tackle complicated physical phenomena, for which pursuing continuum based approaches might be difficult or sometimes insufficient. A detailed discussion on hierarchically representing coupled, multi-physical phenomena through simple models for underlying physical interactions is presented. Appropriate physical models for mechanical contact, conductive and convective heat exchange, fluid-particle interactions, adhesive and near-field effects, and interaction with applied electromagnetic fields are presented. Algorithmic details on assembling the interaction models into a large-scale simulation framework have been elaborated with illustrations. The assembled frameworks were used to develop a computer simulation library (named `Software Library for Discrete Element Simulations' (SLIDES) for the sake of reference and continued future development efforts) and aspects of the architecture and development of this library have also been addressed. This is an object-oriented discrete particle simulation library developed in Fortran capable of performing fully 3D simulations of particulate systems. The utility and effectiveness of the developed simulation frameworks have been demonstrated using two case studies. The first study is on the analysis of the high velocity impact of stream of particles on a porous layer of material, which is a problem of interest in the analysis of erosive wear of manufactured surface coatings. The second case-study is based on the deposition of flowing particulate spray on a target surface, which is a problem of interest in the analysis of particulate deposition-based manufacturing processes. In both cases, the aspect of extracting important information on system behavior from the collective dynamics of the particulate media has been outlined. For the first case, this involved a characterization of material damage due to impact generated stresses, and for the second case, this involved analysis of adhesion and deposited coating properties.

Subjects/Keywords: Mechanical engineering; Mechanics

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APA (6^th Edition):

Mukherjee, D. (2013). Discrete Particle Simulation Techniques for the Analysis of Colliding and Flowing Particulate Media. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/4d05s5ss

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mukherjee, Debanjan. “Discrete Particle Simulation Techniques for the Analysis of Colliding and Flowing Particulate Media.” 2013. Thesis, University of California – Berkeley. Accessed February 28, 2021. http://www.escholarship.org/uc/item/4d05s5ss.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mukherjee, Debanjan. “Discrete Particle Simulation Techniques for the Analysis of Colliding and Flowing Particulate Media.” 2013. Web. 28 Feb 2021.

Vancouver:

Mukherjee D. Discrete Particle Simulation Techniques for the Analysis of Colliding and Flowing Particulate Media. [Internet] [Thesis]. University of California – Berkeley; 2013. [cited 2021 Feb 28]. Available from: http://www.escholarship.org/uc/item/4d05s5ss.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mukherjee D. Discrete Particle Simulation Techniques for the Analysis of Colliding and Flowing Particulate Media. [Thesis]. University of California – Berkeley; 2013. Available from: http://www.escholarship.org/uc/item/4d05s5ss

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pittsburgh

3. Barry, Matthew M. Analytical and experimental studies of thermoelectric devices and materials.

Degree: 2016, University of Pittsburgh

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10183683

► Interest in thermoelectric devices (TEDs) for waste-heat recovery applications has recently increased due to a growing global environmental consciousness and the potential economic benefits… (more)

▼ Interest in thermoelectric devices (TEDs) for waste-heat recovery applications has recently increased due to a growing global environmental consciousness and the potential economic benefits of increasing cycle efficiency. Unlike conventional waste-heat recovery systems like the organic Rankine cycle, TEDs are steady-state, scalable apparatus that directly convert a temperature difference into electricity using the Seebeck effect. The benefits of TEDS, namely steady-state operation and scalability, are often outweighed by their low performance in terms of thermal conversion efficiency and power output. To address the issue of poor device performance, this dissertation takes a multi-faceted approach focusing on device modeling, analysis and design and material processing. First, a complete one-dimensional thermal resistance network is developed to analytically model a TED, including heat exchangers, support structures and thermal and electrical contact resistances. The purpose of analytical modeling is twofold: to introduce an optimization algorithm of the thermoelectric material geometry based upon the realized temperature difference to maximize thermal conversion efficiency and power output; and to identify areas within the conventional TED that can be restructured to allow for a greater temperature difference across the junction and hence increased performance. Additionally, this model incorporates a component on the numerical resolution of radiation view factors within a TED cavity to properly model radiation heat transfer. Results indicate that geometric optimization increases performance upwards of 30% and the hot-side ceramic diminishes realized temperature difference. The resulting analytical model is validated with published numerical and comparable analytical models, and serves as a basis for experimental studies. Second, an integrated thermoelectric device is presented. The integrated TED is a restructured TED that eliminates the hot-side ceramic and directly incorporates the hot-side heat exchanger into the hot-side interconnector, reducing the thermal resistance between source and hot-side junction. A single-state and multi-stage pin-fin integrated TED are developed and tested experimentally, and the performance characteristics are shown for a wide range of operating fluid temperatures and flow rates. Due to the eliminated to thermal restriction, the integrated TED shows unique performance characteristics in comparison to conventional TED, indicating increased performance. Finally, a grain-boundary engineering approach to material processing of bulk bismuth telluride (Bi₂Te₃) is presented. Using uniaxial compaction and sintering techniques, the preferred crystallographic orientation (PCO) and coherency of grains, respectively, are controlled. The effect of sintering temperature on thermoelectric properties, specifically Seebeck coefficient, thermal conductivity and electrical resistivity, are determined for samples which exhibited the highest PCO. It…

Subjects/Keywords: Mechanics; Mechanical engineering

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APA (6^th Edition):

Barry, M. M. (2016). Analytical and experimental studies of thermoelectric devices and materials. (Thesis). University of Pittsburgh. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10183683

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Barry, Matthew M. “Analytical and experimental studies of thermoelectric devices and materials.” 2016. Thesis, University of Pittsburgh. Accessed February 28, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10183683.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Barry, Matthew M. “Analytical and experimental studies of thermoelectric devices and materials.” 2016. Web. 28 Feb 2021.

Vancouver:

Barry MM. Analytical and experimental studies of thermoelectric devices and materials. [Internet] [Thesis]. University of Pittsburgh; 2016. [cited 2021 Feb 28]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10183683.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Barry MM. Analytical and experimental studies of thermoelectric devices and materials. [Thesis]. University of Pittsburgh; 2016. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10183683

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

UCLA

4. Huang, Yue. Multiscale Modeling of Dislocation-Based Crystal Plasticity within a Multiphysics Framework.

Degree: Mechanical Engineering, 2018, UCLA

URL: http://www.escholarship.org/uc/item/6sx9930n

► Simulation-based design and design-by-analysis methods are important tools in the development of modern complex systems due to their impact on attaining shorter manufacturing and construction… (more)

▼ Simulation-based design and design-by-analysis methods are important tools in the development of modern complex systems due to their impact on attaining shorter manufacturing and construction cycles and lower testing cost. The research in this thesis is devoted to the development of a multiphysics-multiscale FEM framework to provide precise analysis of complex energy conversion structural components with relatively high computational efficiency. The main focus is on applications where the incident heat flux on component surfaces is extreme. This motivation leads to four major contributions. Firstly, various widely-used multiphysics simulation strategies and algorithms are assessed, and recommendations on how to select a suitable multiphysics modeling strategy are made. Fully-coupled 3D CFD and heat transfer simulations are found to be necessary in forced-convection cooling in channels under single-sided heat load. Secondly, two multiscale methods for coupling heterogeneous constitutive models in coupled global-local domains are proposed for self-consistent structural analysis. The first is based on the Hu-Washizu variational principle that leads to accurate matching of all stress components across a global-local interface. This matching cannot be achieved by conventional sub-modeling methods. The second method couples the crystal plasticity framework with conventional continuum plasticity by matching the plastic slip at the coupling interface. These two methods have been shown to be accurate and numerically convergent. The superiority of the proposed approaches is demonstrated by comparison to three conventional sub-modeling methods from the literature. Thirdly, an advanced dislocation-based crystal plasticity model has been developed. The model is sensitive to the material microstructure, and can be readily incorporated into the multiscale framework. The model is validated by micro-indentation experiments, where the force-displacement curve, lattice rotations, and dislocation patterns obtained from experiment are quantitatively reproduced. The developed comprehensive multiphysics-multiscale modeling framework has been successfully implemented in the design of three real-life critical components for energy conversion in fusion energy power plants, demonstrating the practical feasibility of the framework.

Subjects/Keywords: Mechanical engineering; Mechanics

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APA (6^th Edition):

Huang, Y. (2018). Multiscale Modeling of Dislocation-Based Crystal Plasticity within a Multiphysics Framework. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/6sx9930n

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Huang, Yue. “Multiscale Modeling of Dislocation-Based Crystal Plasticity within a Multiphysics Framework.” 2018. Thesis, UCLA. Accessed February 28, 2021. http://www.escholarship.org/uc/item/6sx9930n.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Huang, Yue. “Multiscale Modeling of Dislocation-Based Crystal Plasticity within a Multiphysics Framework.” 2018. Web. 28 Feb 2021.

Vancouver:

Huang Y. Multiscale Modeling of Dislocation-Based Crystal Plasticity within a Multiphysics Framework. [Internet] [Thesis]. UCLA; 2018. [cited 2021 Feb 28]. Available from: http://www.escholarship.org/uc/item/6sx9930n.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Huang Y. Multiscale Modeling of Dislocation-Based Crystal Plasticity within a Multiphysics Framework. [Thesis]. UCLA; 2018. Available from: http://www.escholarship.org/uc/item/6sx9930n

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The George Washington University

5. Nasiri, Farshad. The Structure of Boundary Layer Along a Vertical, Surface-Piercing Flat Plate.

Degree: 2018, The George Washington University

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10842581

► The present work reports on Direct Numerical Simulations of a temporally developing, zero pressure gradient, turbulent boundary along a surface piercing flat plate and… (more)

Subjects/Keywords: Fluid mechanics; Engineering

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APA (6^th Edition):

Nasiri, F. (2018). The Structure of Boundary Layer Along a Vertical, Surface-Piercing Flat Plate. (Thesis). The George Washington University. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10842581

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nasiri, Farshad. “The Structure of Boundary Layer Along a Vertical, Surface-Piercing Flat Plate.” 2018. Thesis, The George Washington University. Accessed February 28, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10842581.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nasiri, Farshad. “The Structure of Boundary Layer Along a Vertical, Surface-Piercing Flat Plate.” 2018. Web. 28 Feb 2021.

Vancouver:

Nasiri F. The Structure of Boundary Layer Along a Vertical, Surface-Piercing Flat Plate. [Internet] [Thesis]. The George Washington University; 2018. [cited 2021 Feb 28]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10842581.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nasiri F. The Structure of Boundary Layer Along a Vertical, Surface-Piercing Flat Plate. [Thesis]. The George Washington University; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10842581

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

6. Beckett, Christopher L. Response of Continuous Steel I-Girder Bridges Subject to Temperature Variation.

Degree: PhD, Civil and Environmental Engineering, 2013, West Virginia University

URL: https://doi.org/10.33915/etd.214 ; https://researchrepository.wvu.edu/etd/214

► Thermal deformation of the superstructure in continuous slab-on-girder bridges must be freely permitted to avoid potential adverse behavior due to the development of thermal forces.… (more)

▼ Thermal deformation of the superstructure in continuous slab-on-girder bridges must be freely permitted to avoid potential adverse behavior due to the development of thermal forces. The use of fixed and guided bearings can introduce a significant amount of restraint against thermal deformation that, if not accommodated by the supporting piers, will lead to thermal stresses throughout the structure, most notably in substructure elements (piercaps, bearing assemblies, bearing anchor bolts). The potential effects of restrained thermal deformation in steel I-girder bridges have not been clearly demonstrated. Additionally, the method provided in AASHTO specifications for orienting guided expansion bearings on horizontally curved bridges could foster the development of thermal stresses.;The main goal of this work is to demonstrate and quantify the effect of restrained thermal deformation in an in-service horizontally curved continuous steel I-girder bridge. A second goal is to determine what bearing arrangement scheme is most preferable for minimizing thermal forces. The study presented here includes a comprehensive background discussion, detailed literature review on current concepts regarding the behavior of horizontally curved bridges subject to thermal loads, consequences of inhibited thermal deformation, findings from a field investigation of an in-service steel I-girder bridge, and finite element analysis (FEA).;Finite element analysis is utilized to verify whether or not behaviors documented during a field investigation of the in-service bridge are a result of restrained thermal deformation of the steel I-girder superstructure. During the field inspection, several unfavorable conditions were observed including bent bearing anchor bolts, deformation around the bearing devices, and significant cracking of the reinforced concrete support piers. To investigate these behaviors, 3D finite element modeling of the bridge was completed. Analysis of the FEA study indicates that these behaviors likely result from restrained thermal deformation of the bridge's superstructure. It is found that while lateral pier flexure allows thermal stresses in the superstructure to remain at an acceptable level, stresses in the substructure exceed critical values.;Additionally, FEA is employed to determine what bearing arrangement scheme is preferred for maximizing thermal deformation of the bridge's horizontally curved superstructure, thereby minimizing the possibility that harmful effects may develop. The bridge's geometry, span configuration and location of the support piers remain unchanged so that only the boundary conditions are modified. The study shows that placing fixed bearing assemblies near the bridge's point of zero movement and employing expansion bearing devices at all other support locations results in the most preferable state of stress throughout the bridge. Advisors/Committee Members: Samir Shoukry, Gergis William, David R. Martinelli.

Subjects/Keywords: Civil engineering; Mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Beckett, C. L. (2013). Response of Continuous Steel I-Girder Bridges Subject to Temperature Variation. (Doctoral Dissertation). West Virginia University. Retrieved from https://doi.org/10.33915/etd.214 ; https://researchrepository.wvu.edu/etd/214

Chicago Manual of Style (16^th Edition):

Beckett, Christopher L. “Response of Continuous Steel I-Girder Bridges Subject to Temperature Variation.” 2013. Doctoral Dissertation, West Virginia University. Accessed February 28, 2021. https://doi.org/10.33915/etd.214 ; https://researchrepository.wvu.edu/etd/214.

MLA Handbook (7^th Edition):

Beckett, Christopher L. “Response of Continuous Steel I-Girder Bridges Subject to Temperature Variation.” 2013. Web. 28 Feb 2021.

Vancouver:

Beckett CL. Response of Continuous Steel I-Girder Bridges Subject to Temperature Variation. [Internet] [Doctoral dissertation]. West Virginia University; 2013. [cited 2021 Feb 28]. Available from: https://doi.org/10.33915/etd.214 ; https://researchrepository.wvu.edu/etd/214.

Council of Science Editors:

Beckett CL. Response of Continuous Steel I-Girder Bridges Subject to Temperature Variation. [Doctoral Dissertation]. West Virginia University; 2013. Available from: https://doi.org/10.33915/etd.214 ; https://researchrepository.wvu.edu/etd/214

University of Oxford

7. Ramesh, Rangarajan. An analysis of incomplete contacts in partial slip.

Degree: PhD, 2018, University of Oxford

URL: http://ora.ox.ac.uk/objects/uuid:91d421e0-b055-4c62-89f9-ad40edfcbfc7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770540

► Fretting fatigue is often the cause of failure in many engineering components. It is of importance in safety critical components subject to extreme loads such… (more)

Subjects/Keywords: Engineering; Contact mechanics

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APA (6^th Edition):

Ramesh, R. (2018). An analysis of incomplete contacts in partial slip. (Doctoral Dissertation). University of Oxford. Retrieved from http://ora.ox.ac.uk/objects/uuid:91d421e0-b055-4c62-89f9-ad40edfcbfc7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770540

Chicago Manual of Style (16^th Edition):

Ramesh, Rangarajan. “An analysis of incomplete contacts in partial slip.” 2018. Doctoral Dissertation, University of Oxford. Accessed February 28, 2021. http://ora.ox.ac.uk/objects/uuid:91d421e0-b055-4c62-89f9-ad40edfcbfc7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770540.

MLA Handbook (7^th Edition):

Ramesh, Rangarajan. “An analysis of incomplete contacts in partial slip.” 2018. Web. 28 Feb 2021.

Vancouver:

Ramesh R. An analysis of incomplete contacts in partial slip. [Internet] [Doctoral dissertation]. University of Oxford; 2018. [cited 2021 Feb 28]. Available from: http://ora.ox.ac.uk/objects/uuid:91d421e0-b055-4c62-89f9-ad40edfcbfc7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770540.

Council of Science Editors:

Ramesh R. An analysis of incomplete contacts in partial slip. [Doctoral Dissertation]. University of Oxford; 2018. Available from: http://ora.ox.ac.uk/objects/uuid:91d421e0-b055-4c62-89f9-ad40edfcbfc7 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.770540

University of Akron

8. Waksmanski, Natalie P. Static and Dynamic Analyses of Layered Composite Plates with Multiphase Coupling and Nonlocal Effects.

Degree: PhD, Engineering, 2016, University of Akron

URL: http://rave.ohiolink.edu/etdc/view?acc_num=akron1478775596863257

► In this research, analytical solutions are developed to understand the static and dynamic behavior of layered composite plates under simply supported lateral boundary conditions. Composite… (more)

▼ In this research, analytical solutions are developed to understand the static and dynamic behavior of layered composite plates under simply supported lateral boundary conditions. Composite materials are composed of two or more constituent materials with significantly different properties that can be tuned to provide better engineering properties. Materials with coupling properties can be utilized in composites so that the different phases can interact and create an optimal response. Quasicrystal (QC) and magneto-electro-elastic (MEE) materials exhibit coupling between different phases and are considered in this research. When analyzing QCs, classical linear elasticity theory is extended to higher dimensions to include the phason displacement fields of QCs. At the nanoscale, quantum size effects significantly alter the mechanical properties of QC and MEE materials and the size effect cannot be neglected. Thus, classical linear elasticity is inapplicable and Eringen’s nonlocal elasticity is extended to include the multiphase coupling. To obtain the three-dimensional response, the pseudo-Stroh formulation and propagator matrix method are utilized. The derived solutions for QC and MEE materials can be reduced to the case of a homogenous elastic case for verification. Composite plates consisting of a piezoelectric phase and a piezomagnetic phase show magnetoelectric coupling, which does not exist in either constituent, and are investigated in this research. Also investigated in this research, is the interaction between crystalline and quasicrystalline phases in composite plates. The various static and dynamic analyses demonstrate interesting features associated with the stacking sequence, boundary conditions, loading frequency, nonlocal effect, and phase coupling in the layered composite plate. The presented numerical results can serve as a benchmark for various numerical methods and can be used to check the accuracy of existing or any future plate theories. Advisors/Committee Members: Pan, Ernian (Advisor).

Subjects/Keywords: Civil Engineering; Mechanics

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APA (6^th Edition):

Waksmanski, N. P. (2016). Static and Dynamic Analyses of Layered Composite Plates with Multiphase Coupling and Nonlocal Effects. (Doctoral Dissertation). University of Akron. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=akron1478775596863257

Chicago Manual of Style (16^th Edition):

Waksmanski, Natalie P. “Static and Dynamic Analyses of Layered Composite Plates with Multiphase Coupling and Nonlocal Effects.” 2016. Doctoral Dissertation, University of Akron. Accessed February 28, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1478775596863257.

MLA Handbook (7^th Edition):

Waksmanski, Natalie P. “Static and Dynamic Analyses of Layered Composite Plates with Multiphase Coupling and Nonlocal Effects.” 2016. Web. 28 Feb 2021.

Vancouver:

Waksmanski NP. Static and Dynamic Analyses of Layered Composite Plates with Multiphase Coupling and Nonlocal Effects. [Internet] [Doctoral dissertation]. University of Akron; 2016. [cited 2021 Feb 28]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1478775596863257.

Council of Science Editors:

Waksmanski NP. Static and Dynamic Analyses of Layered Composite Plates with Multiphase Coupling and Nonlocal Effects. [Doctoral Dissertation]. University of Akron; 2016. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=akron1478775596863257

University of California – Berkeley

9. Xu, Huaming. Asperity-scale surface mechanics - Implications to adhesive contacts and microscale deformation behavior of rough surfaces.

Degree: Mechanical Engineering, 2012, University of California – Berkeley

URL: http://www.escholarship.org/uc/item/9wk79512

► The principal objective of this dissertation was to develop numerical and analytical mechanics models accounting for nano-/micro-scale solid surface interaction. This was accomplished by developing… (more)

▼ The principal objective of this dissertation was to develop numerical and analytical mechanics models accounting for nano-/micro-scale solid surface interaction. This was accomplished by developing finite element models of an asperity in adhesive sliding contact with a homogenous half-space and asperity micro-fracture due to normal and sliding contact of homogenous or layered half-spaces, and analytical models of nanoscale surface polishing and nanoparticle embedment on rough surfaces using a probabilistic approach.Adhesive interaction of a rigid asperity moving over a homogeneous elastic-plastic half-space was modeled by nonlinear springs obeying a constitutive law derived from the Lennard-Jones potential. The evolution of the normal and friction forces, subsurface stresses, and plastic deformation at steady-state sliding was examined in terms of the work of adhesion, interaction distance (interfacial gap), Maugis parameter, and plasticity parameter, using the finite element method (FEM). The deformation behavior of homogeneous elastic-perfectly plastic (EPP) and elastic-linear kinematic hardening plastic (ELKP) half-spaces subjected to repeated adhesive sliding contacts was also the objective of this analysis. Numerical results provided insight into the effects of the aforementioned parameters on the friction and normal forces, stress-strain response, and evolution of subsurface plasticity with the accumulation of sliding cycles. The steady-state mode of deformation due to repeated adhesive sliding contacts was examined for both EPP and ELKP material behavior.Subsurface cracking in a layered medium consisting of an elastic hard layer and an elastic-plastic substrate due to adhesive sliding against a rigid asperity was analyzed using linear elastic fracture mechanics (LEFM) and FEM model. The dominance of shear and tensile mode of crack propagation was examined in terms of the interaction depth, layer thickness, crack location, crack length, work of adhesion, and mechanical properties of the thin layer and substrate materials. The effect of adhesion on asperity failure due to normal contact was also studied. The crack growth direction, dominant fracture mode, and crack growth rate were predicted as functions of the initial crack position, asperity interaction distance, interfacial properties, and mechanical properties. FEM results showed the occurrence of different crack mechanisms, such as of crack-face opening, slip, and stick.The evolution of the surface topography during nanoscale surface polishing was studied with a three-dimensional stochastic model that accounts for a multi-scale (fractal) surface roughness and elastic, elastic-plastic, and fully-plastic deformation of the asperities on the polished surface caused by hard abrasive nanoparticles embedded in the soft surface layer of a rigid polishing countersurface. Numerical results of the steady-state roughness of the polished surface, material removal rate, and wear coefficient were determined in terms of the apparent contact pressure, polishing speed,…

Subjects/Keywords: Engineering; Mechanical engineering; Mechanics

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APA (6^th Edition):

Xu, H. (2012). Asperity-scale surface mechanics - Implications to adhesive contacts and microscale deformation behavior of rough surfaces. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/9wk79512

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Xu, Huaming. “Asperity-scale surface mechanics - Implications to adhesive contacts and microscale deformation behavior of rough surfaces.” 2012. Thesis, University of California – Berkeley. Accessed February 28, 2021. http://www.escholarship.org/uc/item/9wk79512.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Xu, Huaming. “Asperity-scale surface mechanics - Implications to adhesive contacts and microscale deformation behavior of rough surfaces.” 2012. Web. 28 Feb 2021.

Vancouver:

Xu H. Asperity-scale surface mechanics - Implications to adhesive contacts and microscale deformation behavior of rough surfaces. [Internet] [Thesis]. University of California – Berkeley; 2012. [cited 2021 Feb 28]. Available from: http://www.escholarship.org/uc/item/9wk79512.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Xu H. Asperity-scale surface mechanics - Implications to adhesive contacts and microscale deformation behavior of rough surfaces. [Thesis]. University of California – Berkeley; 2012. Available from: http://www.escholarship.org/uc/item/9wk79512

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – San Diego

10. Wei, Haoyan. A Meshfree Computational Framework for Modeling Hydro-Mechanical Damage Processes in Porous Geomaterials.

Degree: Structural Engineering, 2018, University of California – San Diego

URL: http://www.escholarship.org/uc/item/2xr741p1

► Hydro-mechanical damage processes occur in numerous geological hazards and engineering applications. Despite considerable effort made in the past years, reliable numerical prediction of failure processes… (more)

▼ Hydro-mechanical damage processes occur in numerous geological hazards and engineering applications. Despite considerable effort made in the past years, reliable numerical prediction of failure processes in multiphase porous media remains challenging. This is mainly due to the complexity of the involved multi-physical phenomena, as well as the ineffectiveness of conventional mesh-based methods (e.g., FEM) which suffer from large deformation-induced mesh distortion issues and exhibit non-convergent solutions for damage and fracture problems. The objective of this work is to develop a robust meshfree computational framework for effective modeling of hydro-mechanical damage processes. To this end, a fluid pressure projection method is employed in conjunction with the stabilized conforming nodal integration to achieve a stable reproducing kernel mixed formulation for poromechanics. Moreover, a damage particle method is developed for fracture modeling, where a smeared description of cracks is adopted to circumvent the burden associated with modeling complex crack patterns. To eliminate the pathological discretization size sensitivity, a scaling law is introduced in the damage model to ensure that the bulk damage energy dissipation over the nodal representative volume is consistent with the surface fracture energy of the crack segment. In addition, the smeared strain is computed as the boundary integral of displacements in each nodal representative domain, which avoids the ambiguity of taking direct derivatives of non-smooth displacements in the cracking region. As such, the computation of field and state variables along with the regularization procedure are all performed at nodal points, without any interpolation commonly needed in FEM. By incorporating the hydro-mechanical coupling, the damage particle method is capable of capturing the growth of fluid-driven cracks without tedious treatments of moving discontinuities. The effectiveness of the developed meshfree formulation is demonstrated in the modeling of hydraulic fracturing and landslides, which involves extreme deformation phenomena and interactions between solid, water and air phases.

Subjects/Keywords: Engineering; Mechanics; Civil engineering

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APA (6^th Edition):

Wei, H. (2018). A Meshfree Computational Framework for Modeling Hydro-Mechanical Damage Processes in Porous Geomaterials. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/2xr741p1

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Wei, Haoyan. “A Meshfree Computational Framework for Modeling Hydro-Mechanical Damage Processes in Porous Geomaterials.” 2018. Thesis, University of California – San Diego. Accessed February 28, 2021. http://www.escholarship.org/uc/item/2xr741p1.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Wei, Haoyan. “A Meshfree Computational Framework for Modeling Hydro-Mechanical Damage Processes in Porous Geomaterials.” 2018. Web. 28 Feb 2021.

Vancouver:

Wei H. A Meshfree Computational Framework for Modeling Hydro-Mechanical Damage Processes in Porous Geomaterials. [Internet] [Thesis]. University of California – San Diego; 2018. [cited 2021 Feb 28]. Available from: http://www.escholarship.org/uc/item/2xr741p1.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Wei H. A Meshfree Computational Framework for Modeling Hydro-Mechanical Damage Processes in Porous Geomaterials. [Thesis]. University of California – San Diego; 2018. Available from: http://www.escholarship.org/uc/item/2xr741p1

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Wisconsin – Milwaukee

11. Severson, Patrick. Analysis of Multi-Directional Recycled Jute Fiber Composite Behavior Using Experimental, Numerical, and Analytical Methods.

Degree: MS, Engineering, 2012, University of Wisconsin – Milwaukee

URL: https://dc.uwm.edu/etd/44

► Composite materials are increasing in popularity as a material of choice in many engineering applications. Major industries using composites include automotive, construction, and sports… (more)

Subjects/Keywords: Composite; Jute; Engineering; Engineering Mechanics

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APA (6^th Edition):

Severson, P. (2012). Analysis of Multi-Directional Recycled Jute Fiber Composite Behavior Using Experimental, Numerical, and Analytical Methods. (Thesis). University of Wisconsin – Milwaukee. Retrieved from https://dc.uwm.edu/etd/44

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Severson, Patrick. “Analysis of Multi-Directional Recycled Jute Fiber Composite Behavior Using Experimental, Numerical, and Analytical Methods.” 2012. Thesis, University of Wisconsin – Milwaukee. Accessed February 28, 2021. https://dc.uwm.edu/etd/44.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Severson, Patrick. “Analysis of Multi-Directional Recycled Jute Fiber Composite Behavior Using Experimental, Numerical, and Analytical Methods.” 2012. Web. 28 Feb 2021.

Vancouver:

Severson P. Analysis of Multi-Directional Recycled Jute Fiber Composite Behavior Using Experimental, Numerical, and Analytical Methods. [Internet] [Thesis]. University of Wisconsin – Milwaukee; 2012. [cited 2021 Feb 28]. Available from: https://dc.uwm.edu/etd/44.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Severson P. Analysis of Multi-Directional Recycled Jute Fiber Composite Behavior Using Experimental, Numerical, and Analytical Methods. [Thesis]. University of Wisconsin – Milwaukee; 2012. Available from: https://dc.uwm.edu/etd/44

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

12. Murphy, Robert G. Experimental Investigation of Particulate Deposition on a Simulated Film-Cooled Turbine Vane Pressure Surface in a High Pressure Combustion Facility.

Degree: MS, Mechanical and Aerospace Engineering, 2012, West Virginia University

URL: https://doi.org/10.33915/etd.290 ; https://researchrepository.wvu.edu/etd/290

► Use of coal syngas for Integrated Gasification Combined Cycle (IGCC) industrial gas turbines introduces contaminants into the flow that can deposit onto the components of… (more)

▼ Use of coal syngas for Integrated Gasification Combined Cycle (IGCC) industrial gas turbines introduces contaminants into the flow that can deposit onto the components of the first stage of the turbine. These deposit structures may create alterations in the cooling scheme and can erode or react with thermal barrier coatings (TBC). A study was performed to examine the evolution and contributing factors to the growth of deposit structures in a simulated gas turbine environment. Tests were performed in the high pressure/temperature aerothermal facility at the Department of Energy's (DoE) National Energy Technology Laboratory (NETL) in Morgantown, WV. The facility was operated at a pressure of 45 psig and temperatures ranging from 1950°F to 2350°F. Two test article geometries with four film cooling holes non-dimensionally matched to a large-scale industrial gas turbine were created to simulate the pressure side of a first stage vane. A high pressure seeding system was developed to inject coal fly-ash to simulate the build-up of particulate matter experienced by industrial gas turbines into the high pressure facility to perform accelerated deposition of the fly-ash onto the test articles. A method was developed to process the fly-ash to match the theoretical size distribution and particle flow dynamics representative of an industrial gas turbine scaled. Analyses were performed to determine whether the particles reached thermal equilibrium before impacting the test article and to estimate the penetration depth of the particles from the injection tube into the mainstream flow of the facility cross flow. Five independent variable effects were studied; impaction angle, freestream temperature, blowing ratio, surface (TBC or no TBC), and increases in simulated operating hours. In studying the effects of surface impaction angle, deposition increased as the face angle of the test article increased from 10° to 20°. Variation of the freestream temperature showed that the deposition was dependent on a theoretical sticking freestream temperature of 2315oF. Deposition resisted forming at temperatures below the theoretical sticking temperature. In studying the effects of blowing ratio, deposition formation increased as the blowing ratio (mass flux of cooling flow/mass flux of the mainstream flow) decreased from M=1.0, 0.25 and finally to 0.0 (no cooling). The study of the effects of the surface coating on deposition showed that TBC's increased the rate of deposition over the exact same test article that was not coated. Instead of forming new deposits with twice the run time, the deposits started forming on top of other deposits showing that even at high particulate loadings the deposition did not affect the film cooling downstream of the cooling holes. Post test surface roughness scans were planned and performed on the test articles that didn't have deposits break off as they were removed from the facility. Most test articles were not scanned due to the flyash deposits breaking or "sluffing" off as the test article… Advisors/Committee Members: Andrew C. Nix, Seth A. Lawson, Gary J. Morris.

Subjects/Keywords: Mechanical engineering; Aerospace engineering; Mechanics

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APA (6^th Edition):

Murphy, R. G. (2012). Experimental Investigation of Particulate Deposition on a Simulated Film-Cooled Turbine Vane Pressure Surface in a High Pressure Combustion Facility. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.290 ; https://researchrepository.wvu.edu/etd/290

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Murphy, Robert G. “Experimental Investigation of Particulate Deposition on a Simulated Film-Cooled Turbine Vane Pressure Surface in a High Pressure Combustion Facility.” 2012. Thesis, West Virginia University. Accessed February 28, 2021. https://doi.org/10.33915/etd.290 ; https://researchrepository.wvu.edu/etd/290.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Murphy, Robert G. “Experimental Investigation of Particulate Deposition on a Simulated Film-Cooled Turbine Vane Pressure Surface in a High Pressure Combustion Facility.” 2012. Web. 28 Feb 2021.

Vancouver:

Murphy RG. Experimental Investigation of Particulate Deposition on a Simulated Film-Cooled Turbine Vane Pressure Surface in a High Pressure Combustion Facility. [Internet] [Thesis]. West Virginia University; 2012. [cited 2021 Feb 28]. Available from: https://doi.org/10.33915/etd.290 ; https://researchrepository.wvu.edu/etd/290.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Murphy RG. Experimental Investigation of Particulate Deposition on a Simulated Film-Cooled Turbine Vane Pressure Surface in a High Pressure Combustion Facility. [Thesis]. West Virginia University; 2012. Available from: https://doi.org/10.33915/etd.290 ; https://researchrepository.wvu.edu/etd/290

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pennsylvania

13. Pan, Lichao. Complex Fluids in Microchannel Flows at Low Reynolds Number: Elastic Instabilities and Rheology.

Degree: 2013, University of Pennsylvania

URL: https://repository.upenn.edu/edissertations/683

► Complex fluids, especially fluids containing polymer molecules, are frequently encountered in everyday life from foods, paints, to cosmetics. Polymeric fluids are usually viscoelastic and do… (more)

▼ Complex fluids, especially fluids containing polymer molecules, are frequently encountered in everyday life from foods, paints, to cosmetics. Polymeric fluids are usually viscoelastic and do not flow like water. As a result, these fluids can exhibit flow instabilities even at low Reynolds number (Re) where viscous forces dominate inertial forces, and a new type of turbulence - purely elastic turbulence. It has been demonstrated that these nonlinear behaviors are arised from elastic stresses and have been observed in flows with curved streamlines. The first part of this work investigates flow instabilities of viscoelastic fluids in microchannel system. Experiments are performed in a long, straight microchannel where the flow is perturbed by placing a variable number of cylinders (0 ≤ n ≤ 15). Results show that the initial disturbance is sustained, in the form of temporal velocity fluctuations, far downstream from the obstacles (200× channel width) in the parallel shear geometry above certain Weissenberg number (Wi). These temporal fluctuations in velocity increase nonlinearly with Wi. Above a critical Wi (Wi > 5.4) and a critical number of obstacles (n ≥ 2), a sharply increase of velocity fluctuations together with a hysteresis loop indicate the presence of a subcritical elastic instability. It is also observed that the initial disturbances can be spreaded far upstream and the upstream velocity fluctuations increase linearly with Wi suggesting the existence of a linear instability upstream. The second part of this thesis is concerned with the rheological characterization of complex fluids in high-shear-rate environments. Such environments are found in lubrication and coating processes as well as in flow through porous media. Microfluidic technology is used due to its small length scale so that the flow remains in the low Re regime (Re << 1) while attaining high shear-rates (up to 104 s-1). Measurements of viscosity of complex fluids including polymeric solutions and human blood plasma at high shear-rates are performed using microfluidic-based rheometry. Viscosity is estimated by measuring the pressure drop along a microchannel using in-situ pressure sensors. Finally, a novel method is proposed and implemented to measure relaxation times of viscoelastic fluids at low strain.

Subjects/Keywords: Engineering Mechanics; Mechanical Engineering; Physics

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APA (6^th Edition):

Pan, L. (2013). Complex Fluids in Microchannel Flows at Low Reynolds Number: Elastic Instabilities and Rheology. (Thesis). University of Pennsylvania. Retrieved from https://repository.upenn.edu/edissertations/683

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pan, Lichao. “Complex Fluids in Microchannel Flows at Low Reynolds Number: Elastic Instabilities and Rheology.” 2013. Thesis, University of Pennsylvania. Accessed February 28, 2021. https://repository.upenn.edu/edissertations/683.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pan, Lichao. “Complex Fluids in Microchannel Flows at Low Reynolds Number: Elastic Instabilities and Rheology.” 2013. Web. 28 Feb 2021.

Vancouver:

Pan L. Complex Fluids in Microchannel Flows at Low Reynolds Number: Elastic Instabilities and Rheology. [Internet] [Thesis]. University of Pennsylvania; 2013. [cited 2021 Feb 28]. Available from: https://repository.upenn.edu/edissertations/683.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pan L. Complex Fluids in Microchannel Flows at Low Reynolds Number: Elastic Instabilities and Rheology. [Thesis]. University of Pennsylvania; 2013. Available from: https://repository.upenn.edu/edissertations/683

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan State University

14. Allafi, Amer Lafi. Improving the performance of an under-damped mass spring damper system through switched parameters.

Degree: 2014, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:2924

►

Thesis M.S. Michigan State University. Mechanical Engineering 2014.

In this thesis we propose to improve the performance of the standard single degree-of-freedom under-damped mass-spring-damper (MSD)… (more)

Subjects/Keywords: Mechanical engineering; Damping (Mechanics); Engineering

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APA (6^th Edition):

Allafi, A. L. (2014). Improving the performance of an under-damped mass spring damper system through switched parameters. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:2924

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Allafi, Amer Lafi. “Improving the performance of an under-damped mass spring damper system through switched parameters.” 2014. Thesis, Michigan State University. Accessed February 28, 2021. http://etd.lib.msu.edu/islandora/object/etd:2924.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Allafi, Amer Lafi. “Improving the performance of an under-damped mass spring damper system through switched parameters.” 2014. Web. 28 Feb 2021.

Vancouver:

Allafi AL. Improving the performance of an under-damped mass spring damper system through switched parameters. [Internet] [Thesis]. Michigan State University; 2014. [cited 2021 Feb 28]. Available from: http://etd.lib.msu.edu/islandora/object/etd:2924.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Allafi AL. Improving the performance of an under-damped mass spring damper system through switched parameters. [Thesis]. Michigan State University; 2014. Available from: http://etd.lib.msu.edu/islandora/object/etd:2924

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

15. Soo , Poey Lam. Analysis of the flow characteristic inside a heated and unheated horizontal rifled tube.

Degree: Fakulti Kejuruteraan Mekanikal dan Pembuatan, 2012, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/2662/

► Rifled tube which is one of the rough surface tube has been getting attention from researchers due to its ability to enhance the heat transfer.… (more)

▼ Rifled tube which is one of the rough surface tube has been getting attention from researchers due to its ability to enhance the heat transfer. Previous researches on rifled tube has been done through experimental work. Therefore, numerical analysis by using commercial Computational Fluid Dynamics (CFD), Fluent® has been carried out to investigate the flow characteristic of the single phase flow in 2 meters long of horizontally rifled tube and smooth tube under heating condition and without heating condition at the outer wall. The rifled tube or also known as spiral internally ribbed tube that is used in this investigation has an outside diameter 45.0 mm and inside equivalent diameter of 33.1 mm while the smooth tube has an outside diameter 45 mm and inside diameter 34.1 mm. The working fluid that is used in this investigation is water. In this numerical analysis, realizable k-epsilon model has been chosen to solve the fully developed turbulence flow in the rifled tube and smooth tube. The result of the numerical analysis showed that there was swirling effect at the near-wall-region for both the case of the rifled tube under heating condition and without heating condition at the wall. The flow characteristic of the rifled tube in terms of pressure drop when there is no heat flux condition at the outer wall shows that the pressure drop in rifled tube is 1.69 – 1.77 folds than in the smooth tube. Meanwhile, when there is heating at the wall of the tubes, the pressure drop and heat transfer coefficient in rifled tube are about 1.67-2.0 times and 0.97-1.27 times respectively, than in smooth tube. The high pressure drop and Nusselt number in rifled tube is due to the helical rib in the rifled tube which not only has disturbed the flow but also causes swirling effect near the wall. As a result, the heat transfers from the wall to the flow near the wall region is enhanced. The present study also has proved that although the rifled tube produces high pressure drop but it is good in heat transfer enhancement through the ratio of heat flux to the pumping power.

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Soo , P. L. (2012). Analysis of the flow characteristic inside a heated and unheated horizontal rifled tube. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/2662/

Chicago Manual of Style (16^th Edition):

Soo , Poey Lam. “Analysis of the flow characteristic inside a heated and unheated horizontal rifled tube.” 2012. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/2662/.

MLA Handbook (7^th Edition):

Soo , Poey Lam. “Analysis of the flow characteristic inside a heated and unheated horizontal rifled tube.” 2012. Web. 28 Feb 2021.

Vancouver:

Soo PL. Analysis of the flow characteristic inside a heated and unheated horizontal rifled tube. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2012. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/2662/.

Council of Science Editors:

Soo PL. Analysis of the flow characteristic inside a heated and unheated horizontal rifled tube. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2012. Available from: http://eprints.uthm.edu.my/id/eprint/2662/

16. Aman, Fazlina. Beberapa masalah aliran lapisan sempadan olakan dengan kesan gelinciran dan tanpa gelinciran pada permukaan.

Degree: phd, Universiti Kebangsaan Malaysia, 2013, Fakulti Sains dan Teknologi

URL: http://eprints.uthm.edu.my/id/eprint/4634/

► Fenomenon kesan gelinciran pada permukaan boleh berlaku pada permukaan bendalir-pepejal dan pada permukaan lapisan bendalir-bendalir, terutama bagi sesetengah bendalir berskala kecil dalam mikroaliran. Dalam kebanyakan… (more)

▼ Fenomenon kesan gelinciran pada permukaan boleh berlaku pada permukaan bendalir-pepejal dan pada permukaan lapisan bendalir-bendalir, terutama bagi sesetengah bendalir berskala kecil dalam mikroaliran. Dalam kebanyakan kajian aliran lapisan sempadan yang telah dilakukan oleh para penyelidik, didapati kesan gelinciran adalah baik bagi meningkatkan kadar pemindahan haba pada permukaan yang diperlukan dalam suatu proses penyejukan. Bagi aliran tanpa gelinciran, ciri-ciri pemindahan haba bergantung pada masalah aliran yang dikaji. Dalam tesis ini, model matematik dibina untuk mengkaji ciri-ciri aliran dan pemindahan haba bagi lima masalah aliran lapisan sempadan yang dihadkan kepada aliran mantap dua matra dalam bendalir likat tak mampat. Masalah pertama dan kedua masing-masing mempertimbangkan aliran berdekatan titik genangan dan aliran hidromagnet, kedua-duanya pada helaian tegak meregang. Masalah ketiga dan keempat mempertimbangkan syarat sempadan gelinciran, masing-masing bagi aliran terhadap titik genangan pada permukaan tegak dan aliran terhadap helaian telap mengecut. Sementara itu, masalah kelima melibatkan aliran pada permukaan meregang/mengecut di bawah aliran ricih luar dengan syarat sempadan permukaan olakan. Formulasi model matematik diperoleh dengan menurunkan persamaan pembezaan separa tak linear kepada persamaan pembezaan biasa menggunakan penjelmaan keserupaan. Analisis kepada sistem persamaan yang terhasil dimulakan dengan menyelesaikan masalah secara berangka menggunakan kaedah kotak Keller atau kaedah tembakan. Kaedah kotak Keller diatur cara menggunakan perisian MATLAB 7, manakala kaedah tembakan menggunakan atur cara “bina dalam” dalam perisian Maple 12. Seterusnya, nilai-nilai berangka bagi pekali geseran kulit dan nombor Nusselt setempat serta profil-profil halaju dan suhu diperoleh untuk pelbagai nilai parameter menakluk seperti parameter nisbah halaju, parameter keapungan, parameter magnet, parameter gelinciran halaju dan terma, nombor Prandtl, parameter olakan, parameter sedutan/semburan dan parameter regangan/kecutan. Keputusan berangka yang diperoleh dipersembahkan dalam bentuk jadual dan graf. Didapati gelinciran halaju mengurangkan pekali geseran kulit tetapi meningkatkan kadar pemindahan haba pada permukaan, manakala kesan gelinciran terma adalah sebaliknya. Suhu permukaan pula didapati bertambah dengan kehadiran medan magnet dan dengan syarat sempadan permukaan olakan. Selain itu, parameter-parameter menakluk yang lain turut mempengaruhi pekali geseran kulit dan nombor Nusselt setempat, di samping kewujudan penyelesaian dual atau unik, bagi masalah-masalah yang dikaji.

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA (6^th Edition):

Aman, F. (2013). Beberapa masalah aliran lapisan sempadan olakan dengan kesan gelinciran dan tanpa gelinciran pada permukaan. (Doctoral Dissertation). Fakulti Sains dan Teknologi. Retrieved from http://eprints.uthm.edu.my/id/eprint/4634/

Chicago Manual of Style (16^th Edition):

Aman, Fazlina. “Beberapa masalah aliran lapisan sempadan olakan dengan kesan gelinciran dan tanpa gelinciran pada permukaan.” 2013. Doctoral Dissertation, Fakulti Sains dan Teknologi. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/4634/.

MLA Handbook (7^th Edition):

Aman, Fazlina. “Beberapa masalah aliran lapisan sempadan olakan dengan kesan gelinciran dan tanpa gelinciran pada permukaan.” 2013. Web. 28 Feb 2021.

Vancouver:

Aman F. Beberapa masalah aliran lapisan sempadan olakan dengan kesan gelinciran dan tanpa gelinciran pada permukaan. [Internet] [Doctoral dissertation]. Fakulti Sains dan Teknologi; 2013. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/4634/.

Council of Science Editors:

Aman F. Beberapa masalah aliran lapisan sempadan olakan dengan kesan gelinciran dan tanpa gelinciran pada permukaan. [Doctoral Dissertation]. Fakulti Sains dan Teknologi; 2013. Available from: http://eprints.uthm.edu.my/id/eprint/4634/

17. Salleh, Mariam. Comparison of rhombic type micromixer to improve mixing efficiency in biomems application.

Degree: Fakulti Kejuruteraan Elektrik dan Elektronik, 2013, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/4702/

► The term lab on chip and micro total analysis system stand synonymous for devices that require handling and processing of small amount of fluid to… (more)

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Salleh, M. (2013). Comparison of rhombic type micromixer to improve mixing efficiency in biomems application. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/4702/

Chicago Manual of Style (16^th Edition):

Salleh, Mariam. “Comparison of rhombic type micromixer to improve mixing efficiency in biomems application.” 2013. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/4702/.

MLA Handbook (7^th Edition):

Salleh, Mariam. “Comparison of rhombic type micromixer to improve mixing efficiency in biomems application.” 2013. Web. 28 Feb 2021.

Vancouver:

Salleh M. Comparison of rhombic type micromixer to improve mixing efficiency in biomems application. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2013. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/4702/.

Council of Science Editors:

Salleh M. Comparison of rhombic type micromixer to improve mixing efficiency in biomems application. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2013. Available from: http://eprints.uthm.edu.my/id/eprint/4702/

18. Abdul Rahim, Suraya. Design and development of groove micromixer for laminar blood-reagent mixing.

Degree: Fakulti Kejuruteraan Elektrik dan Elektronik, 2013, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/4746/

► Mixing of two fluids is an essential process for most of microfluidic device for Biomedical Micro-Electro-Mechanical System (Bio-MEMS) application. Mixing also important in Lab-On-Chip (LOC)… (more)

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA (6^th Edition):

Abdul Rahim, S. (2013). Design and development of groove micromixer for laminar blood-reagent mixing. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/4746/

Chicago Manual of Style (16^th Edition):

Abdul Rahim, Suraya. “Design and development of groove micromixer for laminar blood-reagent mixing.” 2013. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/4746/.

MLA Handbook (7^th Edition):

Abdul Rahim, Suraya. “Design and development of groove micromixer for laminar blood-reagent mixing.” 2013. Web. 28 Feb 2021.

Vancouver:

Abdul Rahim S. Design and development of groove micromixer for laminar blood-reagent mixing. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2013. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/4746/.

Council of Science Editors:

Abdul Rahim S. Design and development of groove micromixer for laminar blood-reagent mixing. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2013. Available from: http://eprints.uthm.edu.my/id/eprint/4746/

19. Yang Ghazali, Zalika. Feasibility study of polysiloxane filled silica as a heat insulator application.

Degree: Fakulti Kejuruteraan Mekanikal dan Pembuatan, 2014, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/5554/

► Polysiloxane or so called polymerized siloxane is basically silicones which are mixed of inorganic-organic polymers. Based on the previous study referred, there were limitation of… (more)

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA (6^th Edition):

Yang Ghazali, Z. (2014). Feasibility study of polysiloxane filled silica as a heat insulator application. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/5554/

Chicago Manual of Style (16^th Edition):

Yang Ghazali, Zalika. “Feasibility study of polysiloxane filled silica as a heat insulator application.” 2014. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/5554/.

MLA Handbook (7^th Edition):

Yang Ghazali, Zalika. “Feasibility study of polysiloxane filled silica as a heat insulator application.” 2014. Web. 28 Feb 2021.

Vancouver:

Yang Ghazali Z. Feasibility study of polysiloxane filled silica as a heat insulator application. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2014. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/5554/.

Council of Science Editors:

Yang Ghazali Z. Feasibility study of polysiloxane filled silica as a heat insulator application. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2014. Available from: http://eprints.uthm.edu.my/id/eprint/5554/

20. Nalathambi, Deenesh Kumar. Air flow profile evaluation around moving vehicle.

Degree: Fakulti Kejuruteraan Mekanikal dan Pembuatan, 2014, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/5647/

► Highway lighting at night does increase the electricity costing because despite using solar energy to generate the electric for the lighting, mostly still uses direct… (more)

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nalathambi, D. K. (2014). Air flow profile evaluation around moving vehicle. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/5647/

Chicago Manual of Style (16^th Edition):

Nalathambi, Deenesh Kumar. “Air flow profile evaluation around moving vehicle.” 2014. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/5647/.

MLA Handbook (7^th Edition):

Nalathambi, Deenesh Kumar. “Air flow profile evaluation around moving vehicle.” 2014. Web. 28 Feb 2021.

Vancouver:

Nalathambi DK. Air flow profile evaluation around moving vehicle. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2014. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/5647/.

Council of Science Editors:

Nalathambi DK. Air flow profile evaluation around moving vehicle. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2014. Available from: http://eprints.uthm.edu.my/id/eprint/5647/

21. Zaman @ Bujang, Izzuddin; Ali, Yaacub Zaki. Vibration control of structure using multiple passive vibration absorbers.

Degree: Fakulti Kejuruteraan Mekanikal dan Pembuatan, 2012, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/6900/

► Vibrations are undesired phenomenon in mechanical structures. It can cause damage, discomfort, destruction and disturbance of the system or the structure. In this study, the… (more)

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA (6^th Edition):

Zaman @ Bujang, Izzuddin; Ali, Y. Z. (2012). Vibration control of structure using multiple passive vibration absorbers. (Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/6900/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zaman @ Bujang, Izzuddin; Ali, Yaacub Zaki. “Vibration control of structure using multiple passive vibration absorbers.” 2012. Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/6900/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zaman @ Bujang, Izzuddin; Ali, Yaacub Zaki. “Vibration control of structure using multiple passive vibration absorbers.” 2012. Web. 28 Feb 2021.

Vancouver:

Zaman @ Bujang, Izzuddin; Ali YZ. Vibration control of structure using multiple passive vibration absorbers. [Internet] [Thesis]. Universiti Tun Hussein Onn Malaysia; 2012. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/6900/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zaman @ Bujang, Izzuddin; Ali YZ. Vibration control of structure using multiple passive vibration absorbers. [Thesis]. Universiti Tun Hussein Onn Malaysia; 2012. Available from: http://eprints.uthm.edu.my/id/eprint/6900/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

22. Idris, Mohd Azli. Vibration simulation of a simply-supported beam with attached multiple absorbers.

Degree: Fakulti Kejuruteraan Mekanikal dan Pembuatan, 2015, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/7544/

► In general, the standard solutions to reduce the vibration and noise problems are to redesign and modify the system such as adding the thickness of… (more)

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA (6^th Edition):

Idris, M. A. (2015). Vibration simulation of a simply-supported beam with attached multiple absorbers. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/7544/

Chicago Manual of Style (16^th Edition):

Idris, Mohd Azli. “Vibration simulation of a simply-supported beam with attached multiple absorbers.” 2015. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/7544/.

MLA Handbook (7^th Edition):

Idris, Mohd Azli. “Vibration simulation of a simply-supported beam with attached multiple absorbers.” 2015. Web. 28 Feb 2021.

Vancouver:

Idris MA. Vibration simulation of a simply-supported beam with attached multiple absorbers. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2015. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/7544/.

Council of Science Editors:

Idris MA. Vibration simulation of a simply-supported beam with attached multiple absorbers. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2015. Available from: http://eprints.uthm.edu.my/id/eprint/7544/

23. Ghazali, Mohd Hafiz. New design of tuned vibration absorber for wide frequency range application.

Degree: Faculty of Mechanical and Manufacturing Engineering, 2015, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/7750/

► Vibrations are undesirable in machines and structures because they increased stresses, energy losses, cause added wear, increase bearing loads, induce fatigue, create passenger discomfort in… (more)

▼ Vibrations are undesirable in machines and structures because they increased stresses, energy losses, cause added wear, increase bearing loads, induce fatigue, create passenger discomfort in vehicles. Uncontrolled vibrations can leave a bad impression to the machine, structure, and human. Vibration on machine can damage the equipment, decrease the machine lifetime and also causing the safety factor problems. In this research, a tuned vibration absorber (TVA) was chosen to be studied where the amount of vibration reduced was determined through finite element analysis (FEA) and validated with the experimental result. A actual scale of tuned vibration absorber was developed and applied on the structure to reduce the vibration. It is expected that by using the new design of tuned vibration absorber, the vibration of the structure can be reduced extensively. The objective of this project is to design and fabricate a newly tuned vibration absorber (TVA) that address a broad frequency range of application, light in weight, small-scale and suitable for mobile purposes. In order to achieve this aim, the preliminary design analysis was performed using finite element analysis before validated by experimental test. There are two design proposed in this study which is design 1 and design 2. The design concept was designed by using SolidWorks® and simulation test was done in this phase as well. From these two design, only one design was selected to be manufactured and tested. Design 1 was selected to be manufactured due to its performance in finite element analysis. DEWEsoft-201 were used as an equipment in experimental phase where the equipment will measure and generate graph data based on vibration performance. This experiment done several times according to the mass distance which is from 0 to 40 sequently. All the data were validated to ensure that the data from the finite element analysis and experimental are matched or even better. The data obtained shows good matched where the data gained are almost the same. The new vibration absorber has a weight of 620.6 kg and it is suitable for mobile purposes.

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Ghazali, M. H. (2015). New design of tuned vibration absorber for wide frequency range application. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/7750/

Chicago Manual of Style (16^th Edition):

Ghazali, Mohd Hafiz. “New design of tuned vibration absorber for wide frequency range application.” 2015. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/7750/.

MLA Handbook (7^th Edition):

Ghazali, Mohd Hafiz. “New design of tuned vibration absorber for wide frequency range application.” 2015. Web. 28 Feb 2021.

Vancouver:

Ghazali MH. New design of tuned vibration absorber for wide frequency range application. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2015. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/7750/.

Council of Science Editors:

Ghazali MH. New design of tuned vibration absorber for wide frequency range application. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2015. Available from: http://eprints.uthm.edu.my/id/eprint/7750/

24. Mohamed Salleh, Mohammad. Vibration control of thin plate structure with attached dynamic vibration absorbers.

Degree: Faculty of Mechanical and Manufacturing Engineering, 2016, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/8989/

► Vibration of a thin plate structure is one of a major concern in most engineering branches since it is the most widely used structural component… (more)

▼ Vibration of a thin plate structure is one of a major concern in most engineering branches since it is the most widely used structural component in industrial applications, such as mechanical, electronic and civil structures. Thin plate structure exposed to vibration can lead to excessive deflections and eventually failure of the structure. The aim of this research is to investigate the effectiveness of using multiple dynamic vibration absorber for vibration control of a fixed-fixed thin plate. The vibration characteristics of thin plate are determined in the initial stage by using free vibration analysis. Two approaches are employed in the study: finite element analysis and experimental modal analysis. The preliminary results of finite element analysis demonstrate that the first five natural frequency of plate are 43Hz, 162Hz, 281Hz, 387Hz and 519Hz. These results are found corroborated well with the experiment, although there is a slight discrepancy in the first mode due to noise generated from inconsistent tapping during the impact hammer test. As it is planned to investigate the effectiveness of vibration absorber, a force vibration analysis of plate is carried out by using finite element method running in parallel with the experimental. Again, the simulation results of force vibration analysis are well validated with the experiment. Result shows that the average percentage reduction of plate attached with single vibration absorber is 84%. While when plate attached with dual dynamic vibration absorber, it provide a larger surpression of vibration amplitude which is about 94% at all frequency modes. From these results, it can be concluded that multiple vibration absorber can reduce the overall global structural vibration compared to a single absorber attachment. Nevertheless, the research reveals that the vibration absorber which designed in this study is significant in reducing the vibration. Both result free and force vibration responses of simulation were found corroborated with the experimental.

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mohamed Salleh, M. (2016). Vibration control of thin plate structure with attached dynamic vibration absorbers. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/8989/

Chicago Manual of Style (16^th Edition):

Mohamed Salleh, Mohammad. “Vibration control of thin plate structure with attached dynamic vibration absorbers.” 2016. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/8989/.

MLA Handbook (7^th Edition):

Mohamed Salleh, Mohammad. “Vibration control of thin plate structure with attached dynamic vibration absorbers.” 2016. Web. 28 Feb 2021.

Vancouver:

Mohamed Salleh M. Vibration control of thin plate structure with attached dynamic vibration absorbers. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2016. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/8989/.

Council of Science Editors:

Mohamed Salleh M. Vibration control of thin plate structure with attached dynamic vibration absorbers. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2016. Available from: http://eprints.uthm.edu.my/id/eprint/8989/

Iowa State University

25. Yao, Qitong. Numerical analysis of a non-polymeric double-network composite.

Degree: 2018, Iowa State University

URL: https://lib.dr.iastate.edu/etd/16496

► Double-network hydrogels have drawn much attention for its combined mechanical properties of high stretchability and high mechanical strength and numerous studies have been conducted on… (more)

Subjects/Keywords: Finite element analysis; Mechanics; Engineering Mechanics

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APA (6^th Edition):

Yao, Q. (2018). Numerical analysis of a non-polymeric double-network composite. (Thesis). Iowa State University. Retrieved from https://lib.dr.iastate.edu/etd/16496

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Yao, Qitong. “Numerical analysis of a non-polymeric double-network composite.” 2018. Thesis, Iowa State University. Accessed February 28, 2021. https://lib.dr.iastate.edu/etd/16496.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Yao, Qitong. “Numerical analysis of a non-polymeric double-network composite.” 2018. Web. 28 Feb 2021.

Vancouver:

Yao Q. Numerical analysis of a non-polymeric double-network composite. [Internet] [Thesis]. Iowa State University; 2018. [cited 2021 Feb 28]. Available from: https://lib.dr.iastate.edu/etd/16496.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yao Q. Numerical analysis of a non-polymeric double-network composite. [Thesis]. Iowa State University; 2018. Available from: https://lib.dr.iastate.edu/etd/16496

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

26. Li, Nan. Development of real-time cellular impedance analysis system.

Degree: PhD, 2014, University of Sussex

URL: http://sro.sussex.ac.uk/id/eprint/49706/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618910

► The cell impedance analysis technique is a label-free, non-invasive method, which simplifies sample preparation and allows applications requiring unmodified cell retrieval. However, traditional impedance measurement… (more)

▼ The cell impedance analysis technique is a label-free, non-invasive method, which simplifies sample preparation and allows applications requiring unmodified cell retrieval. However, traditional impedance measurement methods suffer from various problems (speed, bandwidth, accuracy) for extracting the cellular impedance information. This thesis proposes an improved system for extracting precise cellular impedance in real-time, with a wide bandwidth and satisfactory accuracy. The system hardware consists of five main parts: a microelectrode array (MEA), a stimulation circuit, a sensing circuit, a multi-function card and a computer. The development of system hardware is explored. Accordingly, a novel bioimpedance measurement method coined digital auto balancing bridge method, which is improved from the traditional analogue auto balancing bridge circuitry, is realized for real-time cellular impedance measurement. Two different digital bridge balancing algorithms are proposed and realized, which are based on least mean squares (LMS) algorithm and fast block LMS (FBLMS) algorithm for single- and multi-frequency measurements respectively. Details on their implementation in FPGA are discussed. The test results prove that the LMS-based algorithm is suitable for accelerating the measurement speed in single-frequency situation, whilst the FBLMS-based algorithm has advantages in stable convergence in multi-frequency applications. A novel algorithm, called the All Phase Fast Fourier Transform (APFFT), is applied for post-processing of bioimpedance measurement results. Compared with the classical FFT algorithm, the APFFT significantly reduces spectral leakage caused by truncation error. Compared to the traditional FFT and Digital Quadrature Demodulation (DQD) methods, the APFFT shows excellent performance for extracting accurate phase and amplitude in the frequency spectrum. Additionally, testing and evaluation of the realized system has been performed. The results show that our system achieved a satisfactory accuracy within a wide bandwidth, a fast measurement speed and a good repeatability. Furthermore, our system is compared with a commercial impedance analyzer (Agilent 4294A) in biological experiments. The results reveal that our system achieved a comparable accuracy to the commercial instrument in the biological experiments. Finally, conclusions are given and the future work is proposed.

Subjects/Keywords: 620; TA0349 Mechanics of engineering. Applied mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Li, N. (2014). Development of real-time cellular impedance analysis system. (Doctoral Dissertation). University of Sussex. Retrieved from http://sro.sussex.ac.uk/id/eprint/49706/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618910

Chicago Manual of Style (16^th Edition):

Li, Nan. “Development of real-time cellular impedance analysis system.” 2014. Doctoral Dissertation, University of Sussex. Accessed February 28, 2021. http://sro.sussex.ac.uk/id/eprint/49706/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618910.

MLA Handbook (7^th Edition):

Li, Nan. “Development of real-time cellular impedance analysis system.” 2014. Web. 28 Feb 2021.

Vancouver:

Li N. Development of real-time cellular impedance analysis system. [Internet] [Doctoral dissertation]. University of Sussex; 2014. [cited 2021 Feb 28]. Available from: http://sro.sussex.ac.uk/id/eprint/49706/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618910.

Council of Science Editors:

Li N. Development of real-time cellular impedance analysis system. [Doctoral Dissertation]. University of Sussex; 2014. Available from: http://sro.sussex.ac.uk/id/eprint/49706/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618910

27. Kamardan, Muhamad Ghazali. A mathematical model development for the quasi-static lateral collapse of the generalised geometric hollow shapes.

Degree: phd, Center for Graduate Studies, 2014, Universiti Pertahanan Nasional Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/7797/

► The purpose of this research is to develop a general predictive mathematical model of the deformation behaviours for various symmetric geometrical tubes under lateral compression… (more)

▼ The purpose of this research is to develop a general predictive mathematical model of the deformation behaviours for various symmetric geometrical tubes under lateral compression between two flat rigid plates. The mathematical model has been proposed based on rigid, perfectly plastic model and the energy balance method. The mathematical models are divided into two cases i.e. 'Case 1' and 'Case 2' based on the geometrical shapes of the tubes. ‘Case 1’ is for shapes with number of sides 6, 10, 14 and so on such as hexagonal, decagonal and tetra-decagonal tubes. Whereas, ‘Case 2’ is for shapes with number of sides 4, 8, 12 and so on such as square, octagonal and dodecagonal tubes. The prediction or assumption used in this mathematical model was that the tubes would deform in phase by phase during plastic deformation. In order to achieve this purpose, the deformation behaviour and the energy-absorption performance of various geometrical tube shapes need to be determined. The geometrical tubes shapes which were studied include square, hexagonal, octagonal, decagonal, dodecagonal and tetra-decagonal tubes. For that, experimental tests and finite element analysis (FEA) simulation were conducted to determine the collapse behaviour of these various symmetrical geometric tubes. First, the quasi-static lateral compression test was conducted on square and cylindrical tubes experimentally and by FEA simulation method by using INSTRON Universal Testing Machine and ABAQUS software respectively. Both results were compared to validate the FEA simulation results. Then, the validated FEA simulation method was performed for these various symmetrical geometric tubes to determine their deformation behaviour iii and energy-absorption performance and then to validate the newly mathematical model. The comparison between the experiment and FEA simulation had shown good agreement. The simulation study showed that square and symmetric hexagonal tubes deformed with 1 phase of plastic deformation, symmetric octagonal and decagonal tubes deformed with 2 phases of plastic deformation, symmetric dodecagonal and tetra-decagonal tubes deformed with 3 phases of plastic deformation. It was determined that, the general mathematical model had succeeded to predict the deformation behaviour of various symmetric geometrical shapes for both cases but discrepancy occurred for certain specimens due to sudden high peak at the last phase and small angle difference for neighbouring sides. The energy – absorption performance analyses for different types of symmetric geometrical tubes had shown that symmetric hexagonal tube produced the best energy-absorption with high total energy absorption, low yield stress and long stroke without any sudden jump force.

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA (6^th Edition):

Kamardan, M. G. (2014). A mathematical model development for the quasi-static lateral collapse of the generalised geometric hollow shapes. (Doctoral Dissertation). Universiti Pertahanan Nasional Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/7797/

Chicago Manual of Style (16^th Edition):

Kamardan, Muhamad Ghazali. “A mathematical model development for the quasi-static lateral collapse of the generalised geometric hollow shapes.” 2014. Doctoral Dissertation, Universiti Pertahanan Nasional Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/7797/.

MLA Handbook (7^th Edition):

Kamardan, Muhamad Ghazali. “A mathematical model development for the quasi-static lateral collapse of the generalised geometric hollow shapes.” 2014. Web. 28 Feb 2021.

Vancouver:

Kamardan MG. A mathematical model development for the quasi-static lateral collapse of the generalised geometric hollow shapes. [Internet] [Doctoral dissertation]. Universiti Pertahanan Nasional Malaysia; 2014. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/7797/.

Council of Science Editors:

Kamardan MG. A mathematical model development for the quasi-static lateral collapse of the generalised geometric hollow shapes. [Doctoral Dissertation]. Universiti Pertahanan Nasional Malaysia; 2014. Available from: http://eprints.uthm.edu.my/id/eprint/7797/

28. Tumiran, Mohamad Taufik. Analysis on vibration monitoring at mrt infrastructure construction site.

Degree: Pusat Pengajian Siswazah, 2015, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/8019/

► The study focused on monitoring the level of Peak Vertical Vibration Velocity, mmls at one axis, and was conducted at the Bukit Bintang MRT Station… (more)

▼ The study focused on monitoring the level of Peak Vertical Vibration Velocity, mmls at one axis, and was conducted at the Bukit Bintang MRT Station and Kajang MRT construction. Polytec Laser Doppler Vibrometer (LDV) was used to measure the level of vibration during construction operation. The collaboration with the government local authority such as Land Public Transportation Commission (SPAD) and the project owner MRT Corp itself has helped the studies conducted successfully. Data obtained were analyzed on different sources of vibration which is from ambient, normal excavation, deep excavation and boring works and all data was taken within 25m away from the sources of the vibration. The result from the field measurement by different type of machines have been compared Eurocode 3 and DOE Malaysia. According to recommended limit for structural damage based on Eurocode 3, the safety distances for Bauer BG 28, Komatsu PC200, Liebherr HS 855 HD Litronic, and Sumitomo SH120-3 with TB220 attachment in residential area are 177 m, 15 m, 7 m, and 19.7 m away from the source or receiver. While in commercial land use, it is predicted to be 25 m, 5.3 my 1 m, and 3.4 m respectively. However, DOE guidelines have lower structural damage criterion if compared with Eurocode 3 whereas the recommended limits for damage risk in buildings from steady state vibration only gave the range of frequency and the safety parameters. For human response and annoyance criterion, it seems the use of Bauer BG 28 generates the highest vibration which could discomfort the environment. Based on DOE guideline, the limit for residential area was between 1.2 mm/s to 2.2 mmls, while for commercial use was between 2.2 mmls to 2.9 mm/s respectively. The predicted safety distance from the finding was between 342 m to 2.1 km away from the receiver. While the assessment based on Eurocode 3 found that the use of Bauer BG 28 must be at least separated at 1.2 km away for the construction period less than 6 days.

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tumiran, M. T. (2015). Analysis on vibration monitoring at mrt infrastructure construction site. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/8019/

Chicago Manual of Style (16^th Edition):

Tumiran, Mohamad Taufik. “Analysis on vibration monitoring at mrt infrastructure construction site.” 2015. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/8019/.

MLA Handbook (7^th Edition):

Tumiran, Mohamad Taufik. “Analysis on vibration monitoring at mrt infrastructure construction site.” 2015. Web. 28 Feb 2021.

Vancouver:

Tumiran MT. Analysis on vibration monitoring at mrt infrastructure construction site. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2015. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/8019/.

Council of Science Editors:

Tumiran MT. Analysis on vibration monitoring at mrt infrastructure construction site. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2015. Available from: http://eprints.uthm.edu.my/id/eprint/8019/

29. Che Mohd Husin, Mohd Faizal. A new direct viscous-inviscid interaction method for aerodynamics analysis.

Degree: phd, Faculty of Mechanical and Manufacturing Engineering, 2018, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/12179/

► In manner the way how to solve the flow problem past through a streamlined body such as airfoil, the present work introduce the combination of… (more)

▼ In manner the way how to solve the flow problem past through a streamlined body such as airfoil, the present work introduce the combination of the method for solving the Euler equation and the method for solving the boundary layers equation. Such approach is known as the direct viscous–inviscid interaction (DVII) method. The Euler equation is solved by use of finite volume method based on Roe‟s cell center Scheme while the Boundary layer equation is solved by use of the Keller Box method. Firstly the flow problem is solved which the whole flow domain is governed by the Euler equation. As the pressure distribution as the result of Euler solver obtained, then, it used as input for solving boundary layer equation according the Keller Box Scheme. The boundary layer solution beside provide the skin friction distribution along the body surface is also providing the boundary layer displacement thickness δ*. This quantity describes the displacement of stream line due to the viscous effects. Through displacement thickness, modifying geometry is carried out, to allow recalculation by using Euler solver can be done. As the pressure distribution based on new geometry is obtained, and then it is used for solving the boundary layer equation. This calculation is carried out for several times until a prescribed convergence criterion is fulfilled. The computer code based on these two approaches are developed and used for airfoil aerodynamics analysis. Comparison result between the developed computer code with the available experimental result and XFoil software for the case of flow past through airfoil NACA 0012 and RAE 2822 at various flow condition confirm that the present computer code had been developed successfully. Finally, present study found that the DVII method is only compatible for low and medium Mach number, M ≤ 0.8, where at higher Mach number, DVII method is breakdown due to solution not converge in inviscid solution. However, the convergence determination of global iteration should be included in current study in order to systemize entire computation and it is highly recommended for future.

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Che Mohd Husin, M. F. (2018). A new direct viscous-inviscid interaction method for aerodynamics analysis. (Doctoral Dissertation). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/12179/

Chicago Manual of Style (16^th Edition):

Che Mohd Husin, Mohd Faizal. “A new direct viscous-inviscid interaction method for aerodynamics analysis.” 2018. Doctoral Dissertation, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/12179/.

MLA Handbook (7^th Edition):

Che Mohd Husin, Mohd Faizal. “A new direct viscous-inviscid interaction method for aerodynamics analysis.” 2018. Web. 28 Feb 2021.

Vancouver:

Che Mohd Husin MF. A new direct viscous-inviscid interaction method for aerodynamics analysis. [Internet] [Doctoral dissertation]. Universiti Tun Hussein Onn Malaysia; 2018. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/12179/.

Council of Science Editors:

Che Mohd Husin MF. A new direct viscous-inviscid interaction method for aerodynamics analysis. [Doctoral Dissertation]. Universiti Tun Hussein Onn Malaysia; 2018. Available from: http://eprints.uthm.edu.my/id/eprint/12179/

30. Jaini, Norhaslina. Vibration analysis of a beam structure attached with two dynamic vibration absorbers.

Degree: Fakulti Kejuruteraan Mekanikal dan Pembuatan, 2014, Universiti Tun Hussein Onn Malaysia

URL: http://eprints.uthm.edu.my/id/eprint/6328/

► A fixed end beam is a structural element supported at both sides which carries load primarily in flexure that may experience vibration as it does… (more)

Subjects/Keywords: TA349-359 Mechanics of engineering. Applied mechanics

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jaini, N. (2014). Vibration analysis of a beam structure attached with two dynamic vibration absorbers. (Masters Thesis). Universiti Tun Hussein Onn Malaysia. Retrieved from http://eprints.uthm.edu.my/id/eprint/6328/

Chicago Manual of Style (16^th Edition):

Jaini, Norhaslina. “Vibration analysis of a beam structure attached with two dynamic vibration absorbers.” 2014. Masters Thesis, Universiti Tun Hussein Onn Malaysia. Accessed February 28, 2021. http://eprints.uthm.edu.my/id/eprint/6328/.

MLA Handbook (7^th Edition):

Jaini, Norhaslina. “Vibration analysis of a beam structure attached with two dynamic vibration absorbers.” 2014. Web. 28 Feb 2021.

Vancouver:

Jaini N. Vibration analysis of a beam structure attached with two dynamic vibration absorbers. [Internet] [Masters thesis]. Universiti Tun Hussein Onn Malaysia; 2014. [cited 2021 Feb 28]. Available from: http://eprints.uthm.edu.my/id/eprint/6328/.

Council of Science Editors:

Jaini N. Vibration analysis of a beam structure attached with two dynamic vibration absorbers. [Masters Thesis]. Universiti Tun Hussein Onn Malaysia; 2014. Available from: http://eprints.uthm.edu.my/id/eprint/6328/

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