Abstract:
Our research introduces a validated computational tool, built upon the Crystal Plasticity Finite Element Method (CPFEM) within the DYNA3D® framework, designed to accurately predict large deformations in metals and trace the evolution of their anisotropy. This tool addresses the limitations of conventional models that assume fixed anisotropy during large deformations, which is often inaccurate for processes like cold rolling or forging. We successfully validated its accuracy for large deformations of single crystals of annealed OFHC copper at room temperature. While tests on a polycrystalline aggregate of 512 OFHC copper crystals showed some discrepancy with experimental data, future work is proposed to refine the model. Ultimately, this computational tool offers a significant advantage in virtual material testing by reducing time and cost, and its continued development will enhance our understanding and modeling of anisotropy evolution in FCC and BCC materials during dynamic finite deformations.
