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 87 for “"Mechanical deformation"”.
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GROWTH AND MECHANICAL DEFORMATION OF ALPHA-LACTOSE MONOCRYSTALS
… as the starting point in the study of the mechanical properties and deformation behaviour of alpha-lactose crystals. Chapter 2 conducts a detailed investigation into the crystallisation and growth kinetics of alpha-lactose monohydrate crystals by an agar-gel suspension technique. A large …
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A study of magnetic discontinuities produced by mechanical deformation
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1932.
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Drying of colloidal suspension drops : pattern formation and mechanical deformation
The drying of drops of colloidal suspensions on a hydrophilic substrate leads to the formation of a close-packed solid particle deposit. The initial volume fraction of particles sets the shape and size of this deposit, from a ring at the edge of the drop to a solid film covering the initial wetted …
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Mechanical Deformation of the Extracellular Matrix Mediates Cellular Activation and Mechanotransduction
<p>Mechanical load (tension, compression, strain and stress) is constantly applied to the cardiac extracellular matrix (ECM) at the cellular level (i.e. myocyte contraction and/or fibroblast focal adhesions) or globally through hemodynamic pressures. While mechanical load can be an important factor …
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Molecular Dynamics Simulations of the Mechanical Deformation Behavior of Face-Centered Cubic Metallic Nanowires
… an active area of research due to the enhanced mechanical properties of the nanomaterials in comparison to their respective bulk materials. The effect that the size and shape of a nanomaterial has on its mechanical properties is important to understand if these materials are to be used in …
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Mechanical deformation of neutrophil into pulmonary capillaries induces cytoskeletal remodeling, pseudopod projection and changes in biomechanical properties
… the pulmonary microcirculation are subjected to mechanical stimulation during their deformation into narrow capillaries. To better understand the time- dependant changes caused by this mechanical stimulus, in the first part of the thesis, neutrophils were caused to flow into a microchannel, which …
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Effect of heat treatment and mechanical deformation on the structure and properties of iron-manganese alloys (10-40% Mn).
… material improved with some loss in strength. Deformation during cold rolling was seen to aid the transformation of gamma → epsilon → alpha martensite. The ductile epsilon plus gamma structures would seem to be capable of forming the basis for high strength precipitation hardenable …
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Investigating the role of calcium in the biomechanical response of neutrophils to mechanical deformation experienced in the pulmonary capillaries
… the pulmonary microcirculation are subjected to mechanical deformation while traveling through capillaries of sizes much smaller than the mean neutrophil diameter. This deformation has been shown to result in significant reductions in both the shear storage and shear loss moduli of the cell, with …
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Chemo-mechanics of lithium-ion battery electrodes
Mechanical deformation plays a crucial role both in the normal operation of a Lithium-Ion battery, as well as in its degradation and ultimate failure. This thesis addresses the theoretical formulation, numerical implementation, and application of fully-coupled deformation-diffusion theories aimed …
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Material characterization and axial loading response of pouch lithium ion battery cells for crash safety
… computational model intended to predict mechanical deformation and related short circuit behavior of Li-ion battery cells and stacks in real world impact scenarios. In an effort to continue to refine and validate this modeling tool, characterization testing was conducted on battery cell …
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Grain boundary engineering in additively manufactured polycrystalline materials
… is a well-established approach for enhancing mechanical properties and reducing corrosion susceptibility in polycrystalline materials by increasing the fraction of low-energy grain boundaries. However, conventional GBE relies on complex cycles of mechanical deformation and annealing, which is …
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Aero-thermal-mechanical interactions in ultra high-speed micro gas turbines
Aero-thermal induced mechanical response of engine components in an ultra high-speed micro gas turbine engine system is assessed. Scaling down gas turbine engines for high performance requirement dictates substantial thermal-induced effects on engine operation due to high temperature gradient …
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Mechanical and Electrical Characterization of Hybrid Carbon Nanotube Sheet-Graphene Nanocomposites for Sensing Applications
<p>The unique mechanical and electrical properties of carbon nanotubes and graphitic structures have drawn extensive attention from researchers over the past two decades. The electro-mechanical behavior of these structures and their composites, in which electrical resistance changes when mechanical …
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Effects of Deep Touch Pressure on Anxiety.
… extremes. Deep touch pressure is defined as the mechanical deformation of the skin, coupled with the stimulation of the underlying fascia and periosteum.
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Investigation of mechanical behavior of Alloy 709 for advanced fast reactor applications
… for boiler tube applications. In this work, the mechanical performance of Alloy 709 was studied using tensile tests with in-situ X-ray diffraction (XRD) at various temperatures, ranging from room temperature (RT) to 600ºC, and displacement rates, from 0.001 to 0.004 mm/s. Using these …
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Mesenchymal Stem Cell Mechanobiology and Tendon Regeneration
… exploited for tendon healing. Cells respond to mechanical deformation via a complex set of behaviors involving force-sensitive membrane receptor activity, changes in cytoskeletal contractility and transcriptional regulation. Effective ex vivo model systems are needed to emulate the native …
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Materials in extreme conditions : experimental developments and studies of systems far from equilibrium
… work has directly addressed the coupling between mechanical deformation and chemistry in this system. Further, the literature to date mostly comprises studies with idealized 1-dimensional waves.
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Peridynamics For The Solution Of Multiphysics Problems
… study presents peridynamic field equations for mechanical deformation, thermal diffusion, moisture diffusion, electric potential distribution, porous flow and atomic diffusion in either an uncoupled or a coupled manner. It is a nonlocal theory with an internal length parameter. Therefore, it can …
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