Stress computation and consistent tangent operator using non-linear kinematic hardening models

摘要: One possibility of formulating the tinite element method is founded on principle virtual displacement, in which we want to include a rate-independent elastoplastic constitutive model based assumption yield surface. The equations result from assumptions small deformations, Hooke's law for elastic domain, normality rule evolution plastic strains, von Mises condition and special kind kinematic hardening due Armstrong Frederick,1 linear generalized with saturation term. We show that it not generally recommendable propose large load steps. To this end, investigate influences non-linear stress computation resulting consistent tangent operator. main topics paper are: (1) development problem-optimized backward Euler regard model, (2) study influence term numerical accuracy through isoerror maps (3)