Constitutive modeling of temperature and strain rate effects on anisotropy and strength differential properties of metallic materials
Source abstract
Abstract
The thermal effects on tension compression asymmetry and anisotropy of several metallic materials with a hexagonal close-packed (HCP) crystal structure have been discussed in this study. The Yoon2014 asymmetric yield criterion is combined with a simple Arrhenius type temperature function and a modified Johnson-Cook strain rate model to formulate a thermal dependent plasticity model with analytical solutions for parameter calibration. The temperature and strain rate effects on the strength differential (SD) effects of both isotropic and anisotropic materials have been discussed. Both anisotropy and SD affect the shape of yield locus. In order to quantitatively distinguish the thermal effects on the strength differential and anisotropic effects of metallic materials, the evolution of yield locus and distribution of yield stress under two extreme scenarios has been discussed based on virtual experimental results. For the general application of the thermal dependent asymmetric plasticity model at different temperatures and strain rates, the calibration and validation of the model using uniaxial tensile/compressive results along different directions and biaxial tensile/compressive results have been elaborated for various metallic alloys.
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Research context
OpenAlex topics: High-Velocity Impact and Material Behavior · Metal Forming Simulation Techniques · Metallurgy and Material Forming
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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