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

Abstract

An 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.

Analytical investigation of a grain boundary model that accounts for slip system coupling in gradient crystal plasticity frameworks

“…Matlab scripts for the analytical solution of the single-slip gradient crystal plasticity framework, figure data and corresponding Gnuplot scripts, labelled according to figure number in the manuscript are provided in the electronic supplementary material [57].…”