Numerical modeling of shape memory alloy plates considering tension/compression asymmetry and its verification under pure bending

In this work, a numerical model of a SMA plate reflecting the tension/compression asymmetry of axial stress under pure bending was developed and verified experimentally. To achieve the goal, ABAQUS user-material (UMAT) based on the Brinson model with modified martensite transformation kinetics was proposed with the Drucker-Prager yield criterion to realize the tension/compression symmetry of SMA. To demonstrate the performance of the proposed model, we conducted several predictions on the recovery bending moment with temperature variation with diverse thicknesses under various strain conditions. These results were compared with pure bending test results obtained by a test device that can simulate a pure bending state for maximum 4% axial strain with uniform deformation curvature.