Micromechanical Polycrystalline damage-Plasticity Modeling for metal forming processes
Handbook of Damage Mechanics, Nano to Macro Scale for Materials and Structures
963 – 1020
It is an undisputable fact that metallic materials, when formed at room or high temperature, exhibit large inelastic strains. These strains correspond to the observable consequence of various physical phenomena at the origin of high material nonlinearities that strongly depend on the microstructure of the materials. It is then necessary to consider phenomena such as plastic flow, hardening of various types, initial and induced anisotropies, textural evolutions, micro-defects initiation growth and coalescence (ductile damage) or phase transformations... In most cases, forming processes are further associated to severe environmental conditions (high temperature, important loading velocity, severe chemical conditions…). From a modeling point of view, it seems thus essential to consider the initial microstructure of the material, its evolution under loading conditions as well as its effects on the inelastic flow.