|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||AI/Data Informatics: Computational Model Development, Validation, and Uncertainty Quantification
||Importance of the Choice of Constitutive Model for Full Field Crystal Plasticity Simulations: A Comparison of Predictions of the Voce and the Dislocation Density Based Hardening Laws
||Chaitali Patil, Supriyo Chakraborty, Stephen Niezgoda
|On-Site Speaker (Planned)
Crystal plasticity simulations are useful for machine learning and uncertainty quantification, multiscale modelling and to analyse complex experimental data (e.g. High Energy Diffraction Microscopy). However, validity and accuracy of these simulations depend on the choice of the constitutive law. Hence, we focus on the differences in the field predictions with the variation of the hardening laws in the constitutive models. We studied the Voce law and dislocation density based hardening law using a 3D fast Fourier transform-based elasto-viscoplastic formulation for tensile deformation of copper. Results show that, although average characteristics are similar, stress and texture predictions vary spatially with increasing strain. For the Voce law, dislocation density calculated from the threshold stress is comparatively higher than the predictions of the dislocation density based hardening law. Finally, incorporation of the orientation dependent dynamic recovery (like cross slip) within the dislocation density models is important for the spatiotemporal analysis of field variables.
||Other, Other, Modeling and Simulation