A fully coupled elastoviscoplastic damage model at finite strains for mineral filled semi-crystalline polymer

摘要: Abstract A phenomenological finite strain non-associated elastoviscoplastic model coupled with damage is proposed in order to simulate the behaviour of a 20% mineral filled semi-crystalline polymer for large rate range under several loading conditions. In model, direct relation between logarithmic Eulerian Hencky tensor (work-conjugate Cauchy stress) additively decomposition stretching an elastic and viscoplastic part used. The formulation developed association pressure dependent yield surface take dependency into account. capture non-isochoric deformation involving expansion tensile compaction compression loading, potential developed. This implemented user-material subroutine implicit element code fully return scheme solid shell elements. particular case elements dealt by using second iteration loop ensure zero-normal-stress condition. All material parameters are identified from experimental tests carried out at kinds speed loadings. Numerical responses close experiments