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 10 of 10 for “"elastic-viscoplastic"”.
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A Numerical Study of Intergranular and Oxidation-Driven Fracture in an Elastic-Viscoplastic Material
… as an oxidized grain boundary) embedded in an elastic-viscoplastic material. Additional studies illuminate the complex interactions between stress-assisted grain-boundary diffusion, inelastic material response and grain-boundary cleavage.
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A large-deformation thermo-mechanically coupled elastic-viscoplastic theory for amorphous polymers : modeling of micro-scale forming and the shape memory phenomenon
… strongly temperature- and rate-dependent elastic-viscoplastic behavior is still not very well understood, and is modeled by existing constitutive theories with varying degrees of success. There is no generally agreed upon theory to model the large-deformation, thermo-mechanically coupled …
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A continuum constitutive model for amorphous metallic materials
… Coulomb-Mohr type constitutive theory for the elastic-viscoplastic response of pressure-sensitive and plastically-dilatant isotropic materials has been developed. The constitutive model has been implemented in a finite element program, and the numerical capability is used to study the …
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Analysis of Composite Helmet Impact by the Finite Element Method
… reinforced composite that is modeled as a linear elastic orthotropic material. Hashin's criteria are used to simulate the fiber and the matrix failure. The clay (impactor) is modeled as an elastic-plastic (elastic-viscoplastic), isotropic and homogeneous material. The problem is numerically solved …
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Constitutive equations and failure criteria for amorphous polymeric solids
… recently 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 …
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An internal variable theory for isotropic visco-elastic-plastic solids : application to indentation of amorphous polymeric solids
… phenomenologically capture the large deformation elastic-viscoplastic response of these materials in a reasonably accurate manner, they do not adequately account for the creep response of these materials at stress levels below those causing "macro-yield", as well as the Bauschinger-type reverse …
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Aspects of the mechanics of metallic glasses
… - to develop a continuum-level isotropic elastic free energy that accounts for volumetric-deviatoric coupling effects under circumstances involving large volumetric strains. " We have developed a large-deformation, elastic-plastic constitutive theory for metallic glasses that incorporates …
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Calibration of empirical, semi-empirical, and physics-based material models for the prediction of creep and tensile behaviour of Alloy 617
… presents the calibration of two semi-empirical elastic-viscoplastic (EVP) models using a multi-objective three-stage calibration workflow to capture elevated-temperature creep and tensile behaviour. While the EVP models reproduced creep behaviour reasonably well, accurately capturing tensile …
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Multiphysics modeling of the steel continuous casting process
… of superheat in the molten steel, the elastic-viscoplastic thermal shrinkage of the solidifying shell, the heat transfer through the shell-mold interface with variable gap size, and the thermal distortion of the mold. These models are coupled together with carefully constructed boundary …