Finite Element Method Analysis of Effect of Thickness of Tape-shaped Ti–Ni Shape Memory Alloy on Post-buckling Behavior

Effects of the Volume Fraction of Martensitic-phase during Buckling Deformation on Post-buckling Behavior of Tape-shaped Ti-Ni Shape Memory Alloy Element

“…From the results of our previous studies, it is cleared that the negative tangential stiffness of SMA element during post-buckling deformation tend to have a maximum value when the SMA element is buckled at austenite finish (Af) temperature [11] , and tangential stiffness of SMA element during post-buckling deformation is affected by the Yung's modulus of Austenitic-phase (E) and Martensitic-phase [12] . Furthermore, effect of thickness of SMA element on the post-buckling behavior of SMA is investigated by Threedimensional finite element method (3D-FEM) analyses [13] , and it was predicted that the variation of tangential stiffness of SMA element during post-buckling deformation is due to the variation of the volume fraction of Martensitic phase during post-buckling deformation. In this study, effects of the volume fraction of Martensitic-phase during buckling deformation on postbuckling behavior of tape-shaped SMA element are investigated by buckling tests for tape-shaped SMA elements with various length (L) and 3D-FEM analyses.…”