Even though crystal plasticity models have been available for decades, the quantification of material parameters is still a matter debate. Polycrystalline experimental results can normally be reproduced by multiple sets parameters, raising concerns about best parameterization to predict grain-level response. This work presents novel physics-based model based on mesoscale dislocation substructur...

In this study, a crystal plasticity finite element method (CPFEM) model has been developed to investigate the anisotropic plastic behavior of (001) aluminum single crystal during high-pressure torsion (HPT). The distributions of equivalent plastic strain and Mises stress recorded on the sample surface are presented. The directional variations of plastic strain and Mises stress with the developm...

A long standing postulate in crystal plasticity of metals, known as Schmid law, states that yielding commences once the resolved shear stress on a slip plane reaches a critical value. While non-Schmid effects have previously been reported experimentally (mostly in alloys) and in molecular-dynamics simulations, we examine the validity of this assumption through phonon stability analysis. We subj...

In the current work, a fully implicit numerical integration scheme is developed for modeling twinning-induced plasticity using crystal framework. Firstly, constitutive formulation of twin-based micromechanical model presented to estimate deformation behavior steels with low stacking fault energy. Secondly, discretizing equations through time backward Euler method. A sub-stepping algorithm and t...

To reduce reliance on experimental fitting data within the crystal plasticity finite element method, an approach is proposed that integrates first-principles calculations based density functional theory (DFT) to predict strain-hardening behavior of pure Ni single crystals. Flow resistance was evaluated through Peierls–Nabarro equation using ideal shear strength and elastic properties calculated...