Multiple-slip work-hardening model in crystals with application to torsion-tension behaviors of aluminium tubes

摘要

Torsion-tension behaviors of aluminium tubes are simulated numerically using the finite-element polycrystal model. As a multiple-slip work-hardening model in crystals, the backlash model and the maximum forest dislocation model are proposed to account for Bauschinger effect in reverse loading and cross effect (latent hardening) in non-proportional loading, respectively. The simulations with the new microscopic constitutive law predict well Bauschinger curves, cyclic loading curves and cross loading curves. (C) 1998 Elsevier Science Ltd. All rights reserved. [References: 21]