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 13 of 13 for “"Deformation mechanics"”.
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Deformation mechanics of quartz at a single asperity under hydrothermal conditions
Pressure solution is a naturally occurring deformation process in fluid-bearing rocks, with implications for sediment consolidation rates and deformation in the mid to upper crust. The process involves dissolution at asperities under load; diffusion along grain-to-grain contacts; and precipitation …
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Thermal transport across transfer printed metal-dielectric interfaces: Influence of contact mechanics and nanoscale energy transport
… result using a combination of theoretical deformation mechanics and nanoscale thermal transport. We establish that the plastic deformation and the capillary forces lead to significantly large fractional areal coverage of ~0.2 which enhances the thermal conductance. At the microscopic …
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Mechanics of deformation of carbon nanotubes
The deformation mechanics of multi-walled carbon nanotubes (MWCNT) and vertically aligned carbon nanotube (VACNT) arrays were studied using analytical and numerical methods. An equivalent orthotropic representation (EOR) of the mechanical properties of MWCNTs was developed to model the anisotropic …
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Simplified Ship Collision Model
… solution of external dynamics and internal deformation mechanics. The external sub-model uses a three-degree of freedom system for ship dynamics. The internal sub-model determines reacting forces from side and bulkhead structures using mechanisms adapted from Rosenblatt and McDermott, and …
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The Saltville thrust: investigation of a regional thrust fault in a foreland fold and thrust belt
Thin-skinned models of deformation are currently accepted for the southern Appalachians. The mechanics of this type of deformation are not well understood. The Saltville thrust, a major overthrust in the southern Appalachians, was investigated with respect to deformation mechanics. Thrust …
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Mechanics of abrasive wear of elastomeric materials
… materials due to their ability to undergo large deformations and conform to the mating surface. However, their applications often result in repeated contact with abrasive particles, which act to abrasively wear the elastomers. Elastomeric materials are observed to exhibit a characteristic form of …
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The mechanics of incremental sheet forming
… incrementally by a progression of localised deformation. Despite extensive research into the process, the deformation mechanics is not fully understood. This thesis presents new insights into the mechanics of ISF applied to two groups of materials: sheet metals and sandwich panels. A new …
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Meshfree Modelling of Hyperelastic Mechanics
Large deformation mechanics faces numerous challenges when simulated using mesh-based methods, notably the finite element method. Firstly, the computational modeler is required to fit a mesh to the body of interest, which is a tedious and time-consuming process. Secondly, these meshes are typically …
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Numerical analysis of plastic deformation in metal-ceramic nanolayers during cyclic indentation
… objective of examining the evolving plastic deformation in the ductile metal constrained by the hard ceramic layers. An axisymmetric model consisting of alternating aluminum (Al) and silicon carbide (SiC) thin films on a silicon (Si) substrate is indented by a conical diamond indenter. In …
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Optomechanics of two- and three-dimensional soft photonic crystals
… structures that undergo highly nonlinear deformation due to strain or other external stimulus such as temperature, pH etc. This can in turn dramatically affect optical properties such as light transmittance. Moreover certain classes of lithographically fabricated structures undergo some …
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Numerical analysis of TSV/micro-bump deformation due to chip misalignment and thermal processing in 3D IC packages
… electronic devices. Misalignment induced shear deformation of the through-silicon vias (TSV) and solder micro-bumps are simulated through an applied shearing action. Thermal effects due to coefficient of thermal expansion (CTE) mismatch during processing are also studied to provide trends of …
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The steady-state work density gradient: A new parameter and strategies for characterizing crack propagation in thin ductile sheets
This dissertation presents a new parameter for characterizing the crack growth resistance of thin ductile sheets: the steady-state work density gradient. The steady-state work density gradient describes the stress necessary to drive crack propagation in the late stages of mode I crack growth as the …
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Evaluating the Use of Ductile Envelope Connectors for Improved Blast Protection of Buildings
The rise of intentional or unintentional explosions on both defense critical and conventional buildings requires development of enhanced, cost-effective solutions for the blast protection of structures. This study explores the feasibility of a simple, cost-effective building envelope connector that …