Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 256 for “"mechanical analysis"”.
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Thermal and mechanical analysis of high power microwave windows
… Institute of Technology, Dept. of Mechanical Engineering, 1995.
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Dynamic mechanical analysis of magnetic tapes at ultra-low frequencies
… using a custom, ultra-low frequency, dynamic mechanical analyzer. The long-term mechanical and thermal properties of magnetic tapes can be simulated using high temperature and low frequency dynamic mechanical analysis (DMA) experiments. These experiments investigate how the viscoelastic …
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Dynamic mechanical analysis of graphite/epoxy composites with varied interphases
Dynamic mechanical analysis (DMA) has been used extensively to characterize polymeric materials. This thesis investigates the use of this technique to characterize composite materials. Four material systems, all having the same fiber and the same matrix material, were systematically altered with …
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Morphological and mechanical analysis of the porous structure of cortical bone
… computational resources for finite element analysis. Methods: Cortical bone samples were collected from the middle neck of a cadaver femur(71 year old female, no history of bone disease). The neck was separated into four quadrants:anterior, posterior, superior, and inferior then further …
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Histological and Mechanical Analysis of Bone/Implant Interface in Female Retired-Breeder Rabbits
… with their placement. This study evaluated the mechanical and histological aspects of the bone/metal interface of endosseous titanium implants in compact and trabecular bone. Two implants were placed: one in the distal metaphysis (M) and one 2.0 cm proximal in the diaphysis (D). Right side limbs …
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Continuum mechanical analysis of space and time dependent deformation pattern of brain with blunt injury
Deformation of human brain due to acceleration impact has been widely accepted as the direct connection to the Trauma Brain Injury (TBI). However, the limitation of obtaining deformation data of TBI is a major obstacle to understanding TBI mechanism. This experiment mainly focuses on developing a …
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Thermal-mechanical analysis of targets for high volume production of molybdenum-99 using low-enriched uranium
… holder. This thesis explores those thermal-mechanical design issues for both the cylindrical target design and the plate target design. Analytical, numerical and experimental studies are used to assess the mechanical deformation for these structures and its effect on the target's thermal …
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Structural and mechanical analysis of the black widow spider web subjected to stretching, expansion and wind
… its structure. By performing the structural analysis of the web subjected to various external loads, a relationship between the web geometry and mechanical response may be established. For this study, a web model constructed based on data collected from a member of the species Latrodectus …
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"Quantum Mechanical Analysis and Numerical Optimization of a ""zero-Field"" Spin Echo Small Angle Neutron Scattering Instrument"
The numerical simulations show that the range of spin-echo length varies from 105mum up to 10-2 mum whereas the spin-echo time from 103 ns up to 10-1ns.
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Thermo-mechanical Analysis of a Custom PCB-DBC Hybrid Package for a (650 V, 150 A) e-GaN HEMT
… failure or reliability. With thermally generated mechanical fatigue a consistent cause of electronics failure, it must be investigated for the design to move beyond the prototyping phase. Thermo-mechanical fatigue failure is the brittle fracture of bonds caused by thermally induced warpage. The …
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Quantum mechanical analysis of donor-acceptor interactions in organometallic complexes and comparative analysis of class size and teacher experience on student satisfaction and learning
… in the dihydrogen tautomer. Energy decomposition analysis of these complexes is used to differentiate between the π and σ donor interactions in these complexes. There is a very good linear correlation between the calculated strength of the [M]←(H2) σ donation and [M]→(H2) π backdonation which …
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Quantum Mechanical Analysis of Donor -Acceptor Interactions in Organometallic Complexes and Comparative Analysis of Class Size and Teacher Experience on Student Experience Satisfaction and Learning
Chapter 6 discusses the results of a year long research project studying student perceptions and success in two types of general chemistry courses. This study uses three ways to determine if student performance and satisfaction were different between the two types of sections: exam scores, …
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Modelling of thermo-mechanical and irradiation behavior of metallic and oxide fuels for sodium fast reactors
… a new code, the Fuel Engineering and Structural analysis Tool (FEAST). FEAST has several modules working in coupled form with an explicit numerical algorithm. These modules describe (1) Fission Gas Release and Swelling, (2) Fuel Chemistry and Restructuring, (3) Temperature Distribution, (4) Fuel …
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The Isolation of Cellulose Nanocrystals from Pistachio Shells and Their Use in Water Actuating Smart Composites
… to observe the reinforcement effects by dynamic mechanical analysis. Pistachio shells offered a high yield source material for CNCs, with a high aspect ratio but a low crystallinity. They did offer significant reinforcement of the TPU, but less than the commercially available wood-based CNCs. …
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Acoustic Characterization and Preliminary Noise Control of Pneumatic Percussion Tools
… results are described in detail. A mechanical analysis was performed on a chipping hammer finding mode shapes and natural frequencies of individual components. The mechanical analysis included modal hammer measurements and creating FE models. Fluid measurements were performed on the …
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Influence of the Interphase on the Mechanical Properties of Nylon 66 Composites
The mechanical properties of glass fiber and carbon fiber reinforced nylon 66 were investigated using both microscopic and macroscopic testing techniques. The objective was to determine how different interphase morphologies affect the adhesion and properties such as damping, ultimate stress and …
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