A physically based constitutive model for FCC single crystals with a single state variable per slip system
Demir, Eralp (2017) A physically based constitutive model for FCC single crystals with a single state variable per slip system. Modelling and Simulation in Materials Science and Engineering, 25 (1). ISSN 0965-0393 (Print) 1361-651X (Online)
Official URL: http://dx.doi.org/10.1088/1361-651X/25/1/015009
A new, simple and physically consistent dislocation-density-based continuum model is developed in a large-strain crystal plasticity framework. All the constitutive laws are expressed in a simple and unique way in terms of a single state variable dislocation density. The proposed physically based model predicts experimental single-crystal stress-strain curves along different crystal directions more accurately than a classical model with widely accepted constitutive laws. The polycrystal texture predictions from the dislocation-density-based and classical models having the same single-crystal stress-strain characteristics are in good agreement with the classical model when Taylor-type homogenization is used in conjunction with enough number of grains.
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