|About this Abstract
||7th World Congress on Integrated Computational Materials Engineering (ICME 2023)
||Micromechanical Modeling of Cyclic Damage in Metallic Materials
||Gururaj Gopal Rao, Leslie T Mushongera
|On-Site Speaker (Planned)
||Gururaj Gopal Rao
Fatigue is amongst the major physical processes associated with crystalline materials that lead to premature failure. Understanding how fatigue cracks initiate in crystalline materials is very challenging because the microstructural features around these cracks evolve continuously with cyclic loading. A phase-field model for heterogeneous microstructures is developed to study the evolution of phase, stress, and plastic strains in metallic material systems under cyclic loads. A small strain plasticity model based on the principles of continuum mechanics is integrated into the phase field model. Local momentum balance is solved on a staggered grid using the finite difference method to compute displacement fields. For calculations of plastic strains, a Prandtl-Reuss-type model consisting of an associated flow rule in combination with the von Mises yield criterion and a linear isotropic hardening approximation is implemented. Evolution of the stresses, plastic strains are obtained by establishing the consistency condition using a two-step return mapping algorithm.