3D numerical simulations and microstructural modeling of anisotropic and tension–compression asymmetric ductile materials

In the present work, we have analyzed effect of anisotropy on void growth and stress–strain behavior for materials that exhibit remarkable tension–compression asymmetry (i.e., zirconium alloys). For purpose, performed finite element simulations using a cubic 3D cell with spherical inside subjected to periodic boundary conditions. Nonlinear kinematic constraints are also imposed as conditions in order maintain values macroscopic ratios constant during whole loading history account general (3D) stress state. The matrix material is described by CPB06 anisotropic criterion developed Cazacu et al. (2006). numerical results compared those considering homogeneous (without void) same initial porosity voided one governed porous yield Stewart (2011). To investigate influence prescribed stress, strength differential parameter strain hardening exponent non-homogeneous (with cells, used several ratios, three parameters exponents. Finite obtained from different show significantly affect both cells. Moreover, comparison two cells proves evolution good qualitative agreement all parameter. contrast, value increases, between worse. An heuristic extension (2011)’s model proposed this work an attempt improve accuracy model.