|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Prediction of Deformation and Failure Anisotropy for Magnesium Sheets under Mixed-mode Loading
||Dirk Steglich, Jacques Besson
|On-Site Speaker (Planned)
Despite its attractive strength-to-weight ratio of magnesium alloys, the application of magnesium sheets structures is restricted. Its anisotropy, the tension-compression asymmetry (the so-called strength differential effect, SD effect) and its poor formability at room temperature still challenge engineers. The use of magnesium sheets could be expanded once effective and reliable predictive tools for the assessment of forming applications are provided. In the current contribution, the deformation and failure behaviour of the innovative magnesium alloy “E-form” AZ31 at room temperature is investigated by means of mechanical tests and respective numerical simulations. Tensile and modified Arcan tests are analysed by digital image correlation (DIC) techniques. Irreversible deformation is described by a two yield surface model, which couples the micromechanical mechanisms of dislocation glide and deformation twinning. Anisotropic failure is modeled using a linear transformation of the strain rate, which allows for a fast and efficient assessment of forming operation at room temperature.
||Definite: At-meeting proceedings