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 9 of 9 for “"Viscoplastic deformation"”.
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Micromechanics, macromechanics and constitutive modeling of the elasto-viscoplastic deformation of rubber-toughened glassy polymers
Glassy polymers, such as polystyrene (PS), poly(methyl methacrylate) (PMMA) and polycarbonate (PC), are common engineering polymers that have found uses in consumer products ranging from portable computers and optical lenses, to automotive components and appliance housings. PMMA and PS are …
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A study of bruise damage in horticultural products
… as causing bruise damage include plastic/viscoplastic deformation, predominantly in soft produce, and damage instabilities associated with crisp and moderately-crisp produce.
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Constitutive equations and failure criteria for amorphous polymeric solids
… developed a continuum theory for the elastic-viscoplastic deformation of amorphous solids. Their theory is motivated by and builds on the work of Parks, Argon, Boyce, Arruda, and their co-workers (e.g. Boyce et al., 1988; Arruda & Boyce, 1993) on modeling the plastic deformation of amorphous …
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Electro-chemo-mechanics of solids: application to all-solid-state batteries, polyelectrolyte gels, and actuators.
… the electrodeposition and attendant large viscoplastic deformation of lithium at the anodeSE interface of an all-solid-state lithium metal battery (ASSLMB). Through numerical finite-element implementation of our model, we have studied the deleterious effects of plating-and-stripping of …
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Thermodynamics and kinetics of ion-exchange in perchlorate-selective poly(vinylbenzyltrialkylammonium chloride) matrices
… and dehydration, which is attributed to elasto-viscoplastic deformation and influenced by a depression of the glass transition temperature via plasticizing. These results suggest the mechanical properties of hydrophobic polycations may be effectively controlled through judicious selection of …
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Mesoscale Computational Analysis on the Reactivity of Heterogeneous Energetic Materials with Electromechanical Properties
… via thermomechanical dissipation produced by viscoplastic deformation, friction, and fracture. Yet, little is known regarding the other types of excitation leading to ignition. Electromechanically induced dissipation is one notable example of such mechanisms that have become increasingly vital …
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Coupled Gradient Enhanced Damage - Viscoplasticity Model Using Phase Field Method
… and couple it to the well-known Perzyna type viscoplastic model to account for inelastic behavior of ductile materials. To accomplish this task, the following steps have been performed. First, a new nonlocal, gradient based damage model is proposed for isotropic elastic damage using the phase …
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Microstructure-based modeling of damage and healing in salt rock with application to geological storage
… homogenization scheme, in which the viscoplastic and damage behavior of halite polycrystals is upscaled from mono-crystal slip mechanisms. The model provides micro-mechanical interpretations to important aspects of salt rock viscoplastic and fatigue behavior. We implemented the …
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Structure-property relationships in polymeric materials via advanced rheological and neutron scattering techniques
… clear transition from linear viscoelasticity to viscoplastic deformation and back again during a period. We further develop a freeware that can automatically perform the analysis and suggest material physics such as stiffening or softening. A detailed protocol of performing a LAOS measurement, …