A new strain hardening model for rate-dependent crystal plasticity

This paper presents a crystal plasticity based finite element analysis employing the new microstructure-based strain hardening model recently presented by Saimoto and Van Houtte (2011) [7] to simulate formability and texture evolution in the commercial aluminum alloy 5754. Simulations are performed to compare the predictive capability of the new hardening model against the common work hardening models using a rate-dependent plasticity formulation. The parameters in the numerical models are calibrated using the X-ray data published by Iadicola et al. (2008) [9] for the aluminum sheet alloy 5754. The predictions of the model for balanced biaxial tension and in-plane plane-strain tests are compared against experimental observations presented in Iadicola et al. (2008) [9]. It is concluded that the new model provides the best predictions of the large strain behavior of Aluminum sheet alloy 5754 subjected to various strain paths.

► We present new strain hardening model by Saimoto-Van Houtte (2011) into rate dependent crystal plasticity.
► Predictive capability of this model investigated against existing models.
► The results compared to experimental observations of Iadicola et al. (2008).
► New model provides best predictions for all loading conditions studied.
► Strain hardening and saturation are natural outcomes and do not need to be adjusted externally.