Crystal plasticity finite-element simulations for quasistatic deformation of polycrystals in terms of explicit dynamics

Crystal plasticity models combined with an explicit consideration of a polycrystalline structure are an effective tool for studying the deformation phenomena throughout length scales. A numerical solution to the boundary-value problems with an explicit account for misrostructural features requires extensive computational resources. The use of explicit time integration schemes effectively reduces computational costs yet providing a quasistatic solution with a high degree of accuracy. In this paper, we discuss the numerical aspects of crystal plasticity finite element simulations of quasistatic deformation phenomena in terms of explicit dynamics. The equations for plastic strain rate are formulated in a way to minimize strain rate sensitivity, which is the necessary condition for simulating quasistatic deformation at artificially high strain rates. The problems of model verification and testing at the micro, meso, and macroscales are discussed using the example of aluminum single- and polycrystals.