A new constitutive model to describe evolving elastoplastic behaviours of hexagonal close-packed sheet metals

Abstract This study develops a new phenomenological constitutive model to capture the unique evolving cyclic elastoplastic behaviours of hexagonal close-packed (HCP) sheet metals. is developed by adopting concepts multiple-yield surface approaches. Four deformation modes, including Monotonic Compression (MC), Tension (MT), Reverse (RC), and (RT), are considered represent hardening evolution materials, twining/untwining behaviours. Reference flow stress equations introduced, Cazacu-Barlat 2004 (CB2004) type yield employed each mode. In addition, RT parameters defined as functions plastic pre-strains mitigate interpolation error caused parameter determination processes existing models. For validation, calculated stress–strain curves AZ31B magnesium alloy compared with experimental available from literature. Moreover, show accuracy proposed analytical model, reproduced those an model—the modified homogeneous anisotropic (HAH) model. The obtained results that can successfully reproduce Tension–Compression-Tension (TCT) Compression-Tension–Compression (CTC) HCP metals considerably less percentage errors.