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 7 of 7 for “"normal contact"”.
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Design and analysis of a soft spiral gripper
… presents a bio-inspired technique to increase contact area while grasping and handling long slender objects by helically twisting around them. An embodiment of such a spiral gripper utilizes unique configurations of pneumatically actuated Fiber Reinforced Elastomeric Enclosures which has a …
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Design of Tribologically Enhanced Polymeric Materials for Biomedical Applications
<p>Anytime two surfaces are in normal contact, accompanied by tangential motion, there is potential for deterioration of one or both surfaces. Gradual wear, or the removal of surface material, is typically an undesirable event. Therefore, the need for lubrication arises to minimize the amount of …
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Imaging and Understanding Atomic-Scale Adhesion and Wear: Quantitative investigations Using in situ TEM
… (AFM). However, AFM lacks direct access to the contact geometry and structure. In this thesis, nanoscale adhesion and wear tests were performed inside of a transmission electron microscope (TEM), enabling real-time in situ interrogation of the contact in vacuum. Quantitative data was extracted …
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Analytical Evaluation of the Accuracy of Roller Rig Data for Studying Creepage in Rail Vehicles
… a scaled roller rig for accurately assessing the contact mechanics and dynamics between a profiled steel wheel and rail, as is commonly used in rail vehicles. The established creep models of Kalker and Johnson and Vermeulen are used to establish correction factors, scaling factors, and …
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Failure of laterally crushed aluminum tubes under combined bending and tension
… evolution of the depressions in the presence of normal contact stresses requires the use of solid elements. Localization is clearly a three-dimensional phenomenon and shell elements reproduce most of the structural response well, but not the depressions and their evolution that eventually cause …
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Modeling Macro-scale Clay Behavior at Micro-scale Clay Particle Interfaces
… in consolidation tests experience shear and normal forces at the inter-particle level due to force applied to the soil at the macro-scale. These shear and normal forces cause the particles to slide at the micro-scale and produce macro-scale changes in soil volume and shape. By considering the …
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Analysis of signal transduction pathways and the cytoskeleton in VASP-deficient cell lines and mouse models
… cell lines presented similar growth rates and normal contact dependent-growth inhibition but showed differences in morphology, migration and adhesion. Adherent VASP-/- cells, despite normal Mena and Evl expression levels, were highly spread. VASP-/- cells covered about twice the substrate …