A NEW COMPUTATIONAL APPROACH TO CRYSTAL PLASTICITY - FCC SINGLE-CRYSTAL

An algorithm is proposed for the calculation of the finite deformation of fee single crystals, using a rate-dependent slip model. The method also applies to bcc and hcp crystals. The history of the deformation is divided into three regimes, depending on the number of active slip systems, and a computational strategy is proposed for each regime. The proposed algorithm uses a combination of the forward-gradient and the plastic-predictor elastic-corrector methods. The efficiency and the a ccuracy of the proposed algorithm is demonstrated by comparing the res ults with those of the conventional method.