Experimental Studies of Dynamic Behavior of TiNi Alloy Thin Circular Plate subjected to Transversal Impact

摘要

Here goes the abstract. For instance, one can write that this work The experimental research of thin circular plate of pseudo-elastic TiNi alloy under fixed supports and transversal impact loading was conducted through using the modified apparatus of Split Hopkinson Pressure Bar. The experiment results of pseudo-elastic TiNi alloy was compared with that of A3 steel. The nature of dynamic mechanical response of the structure in spatio-temporal scale, including the propagation of flexible wave in the plate, evolution of transformation zones and full-field out of plane displacement were derived. The results show that transformation zones and transformation hinge may generate near the center of the plate (about 5mm) because of two-dimensional diffusion effect of the circular plate under impact loading. The transformation hinge disappears after unloading; however, the A3 steel plate has residual deformation obviously. The impact response of TiNi alloy thin circular plate is dominated by the thermo-elastic martensite phase transformation and inverse transformation, which differs from the conventional elastic-plastic transformation mechanism.