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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 67 for “"mechanical stresses"”.
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Mechanical stresses upon phase transitions
Mechanical stress studies were carried out on three different groups of functional coatings using a purpose-built system. Functional coatings have become increasingly important in recent years due to their interesting technological applications. In this work three different groups of coatings were …
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Cellular responses to mechanical stresses applied via magnetic manipulators
… model aims to explain how a cell senses mechanical forces and translates them into molecular events, such as changes in intracellular ion concentrations, gene expression, post-translational protein modification, or cytoskeletal redistribution. Many studies of mechanotransduction explore …
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Effect of Prostaglandin E2 on Mechanical Stresses Applied by MC3T3-E1 Osteoblast-like Cells on a Soft Hydrogel Substrate
<p>Osteoblasts are sensitive to mechanical stimuli and release Prostaglandin E2 (PGE2) when exposed to a fluid shear stress. The exact mechanism by which these cells sense mechanical stress is not well established. A study of the stresses applied by the osteoblasts, under the influence of PGE2, on …
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Scientific visualization of stress tensor information with applications to stress determination by X-ray and neutron diffraction
The visual analysis of mechanical stress facilitates physical understanding of the tensor quantity which is concealed in scalar and vector methods. In this study, the principles and techniques of scientific visualization are used to develop a visual analysis of mechanical stresses. Scientific …
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Substrate curvature measurement system
… of deformation induced in a solid object by mechanical stress. One such process is during the manufacture of very large scale integrated circuits (VLSI). During this process a substrate is coated with a thin film to protect the micro circuitry formed on the substrate. Due to the differences …
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Rapid Rac GTP-ASE activation in live cells by mechanical stress is independent of Src
It is well-known that mechanical forces are crucial in regulating functions of every tissue and organ in a human body. However, it remains unclear how mechanical forces are transduced into biochemical activities and biological responses at the cellular and molecular level. Using the magnetic …
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Residual stresses due to grinding
An analytic treatment of stresses and temperatures generated during grinding is presented from an elasticity approach. A two-dimensional heat conduction model employs an energy partition scheme in the grinding zone to produce realistic temperature profiles. By using the basic equations of …
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The Effect of Pressure on the Superconducting Transition in Tin
The role played by mechanical stresses in superconductivity has aroused much interest recently because of the appearance of atomic theories of superconductivity which attempt to explain how the effects of pressure come about. Prior to the recent war the only experiments on the pressure effect were …
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Topographically and Mechanically Tunable PNIPAM Scaffolds
… The tunability of the structural and mechanical properties of PNIPAM makes it particularly at- tractive in emulating cell environments and dynamic cytoskeletal deformations. This thesis discusses PNIPAM's properties and applications in different forms i.e., solution, brushes, …
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Infrared Frequency Shifting in Thermally- and Mechanically-Stressed Polymers (Anharmonicity, Nonequilibrium, Ftir, Fourier, Transform, Spectrometer)
Thermal and mechanical stresses alter the spacing of the constituents of a polymer chain, usually resulting in the reduction of the molecular vibration frequency as revealed by the transmission infrared spectroscopy of stressed polymer films. The effect of stress and temperature on infrared …
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Mechanics of Seashell Growth: Examining the relationship between incompatibility, shape, and internal stress
… these processes. However, the role of internal mechanical stresses that may develop due to incompatibility has yet to be investigated. In this thesis, we present a framework that models the shell growth continuously, with an aim to investigate the role of internal stresses on the structural …
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Bluttraumatisierung bei der Passage zeitkonstanter und zeitvarianter Scherfelder
… pumps or artificial heart valves high fluid mechanical stresses are dominating. This thesis reports about a systematic damage investigation under such conditions. In vitro blood damage experiments with labtypes of artificial systems only result in information on the overall damage since their …
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Pressure-Induced Intracellular Signaling in Isolated Arteries
<p>The ability of cells to respond to mechanical stimuli has been studied through a variety of techniques in numerous cell types. The cells of the vascular wall have adapted to specific mechanical stresses through the activation of intracellular signaling pathways which result in cell-specific …
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Interação do hidrogênio com a microestrutura dos aços inoxidáveis supermartensíticos sob regime elástico
… H2S, and chloride rich environments, and higher mechanical resistance and toughness. Therefore, under severe conditions, properties loss and hydrogen embrittlement may occur. With the understanding of mechanical stresses during manufacturing or operation, along with residual stresses, this work …
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Continuum modeling of electro-chemo-mechanical phenomena in all-solid-state batteries
… of SSBs faces a series of chemo-mechanical issues across its constituents, namely growth induced fracture of solid-state electrolyte (SSE) due to metal deposition, interphase formation at the anode/SSE interface and damage of the various phases in composite electrodes. …
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Pulse-field actuation of collinear magnetic single crystals
… not brought on just by changes in temperature or mechanical stresses, but can also be driven by the application of a relatively small magnetic field. The large strains exhibited by such materials are a result of the coexistence of several features, including a thermoelastic martensitic transition, …
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Modelling of solder interconnection’s performance in photovoltaic modules for reliability prediction
… cells in the modules due to accelerated thermo-mechanical degradation. The goal of this research is to provide adequate information for proper design of solar cell solder joint against fatigue failure through the study of cyclic thermo-mechanical stresses and strains in the joint. This is …
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Finite element simulation based design and optimization of electric motors for EV/HEV traction application
… to perform in all extreme cases of thermal and mechanical stresses. And it is made possible by all the research and development in all the areas of electrical machines, power electronics and energy storage that electric vehicle systems can meet very challenging specifications. With the …
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A Nondimensional Scaling Parameter for Predicting Pressure Wave Reflection in Stented Arteries
… probably due to a combination of abnormal mechanical stresses and disruption of the arterial blood flow. The goal of this research was to develop recommendations concerning ways in which stent design might be improved, focusing on the problem of pressure wave reflections. A one-dimensional …
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Computational Reconstruction and Quantification of Aerospace Materials
… many aerospace systems owing to their desirable mechanical performance under large thermo-mechanical stresses.
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