Algorithmic tangent matrix approach for mixed hardening model of endochronic plasticity

A hypoelasto-plastic finite strain simulation of powder compaction processes with density-dependent endochronic model

“…An unconditional stable integration scheme of endochronic constitutive equations was proposed by Hsu et al (1991Hsu et al ( , 1992 and its ability is examined in the modeling of random non-proportional tests on OFHC copper. Hsu and Griffin (1996) implemented radial return algorithm in integration of endochronic constitutive equations and applied their formulation to finite element micromechanics modeling of a unidirectional metal matrix composite subjected to non-proportional cyclic loading.…”