Large Strain Gradient Plasticity Theory with a Discontinuous Grain Boundary Yield Condition

Abstract

AbstractAn equivalent plastic strain gradient theory [1] is extended to account for finite strains. The presented model considers discontinuities of the equivalent plastic strain at grain boundaries by using enriched trial functions in the Finite‐Element discretization. As a consequence, a grain boundary flow rule is introduced, depending on both the mean value and the jump of the equivalent plastic strain. (© 2016 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)