FTMP-based Kink Deformation and Strengthening Mechanisms for Mille-feuille Structures

This study aims at reproducing deformation-induced kink morphologies, together with the recently-reported AE measurement-based energy releasing characteristics, based on FTMP (Field Theory of Multiscale Plasticity)-incorporated crystal plasticity finite element simulation for single crystal Mg under c-axis plane strain compression condition. Two models either with the well-defined deformation twin system or a rank-1 connectionbased kink system are considered, respectively, as the projection direction for the incompatibility tensor to be used in the constitutive model. The twin model yields "kink-like morphology" of growing kind, but fails to capture one of the energy releasing characteristics. The kink model, on the other hand, is demonstrated to be able to reproduce basically all the features, i.e., not only the "kink" morphology but also the AE energy-based features.