Abstract：
Shape memory alloy wire in austenitic state induced by stress will be represent super-elastic effect at room temperature. Stress-strain curve shows the full hysteretic curve and consumes lots of energy in a completely loading and unloading cycle. The tensile test of shape memory alloy (SMA) wire was completed at room temperature. The influences of loading rate, strain amplitude, as well as number of cycles on working performance, such as equivalent stiffness, energy-dissipating capacity and equivalent damping ratio of the SMA wire in austenitic state are analyzed. The experimental results show that energy-dissipating capacity decreases with the increasing of loading rate; Energy-dissipating capacity increases obviously with the increasing of strain amplitude. Shape memory alloy wire should be set certain prestrain for ensuring the stable energy-dissipating capability in the engineering application; Energy-dissipating capacity decreases obviously with the increasing of number of cycles. Shape memory alloy wire should be conducted enough number of mechanical training for ensuring the stable mechanical properties in the engineering application.
ZHU Jiong,WANG Hao,GUO Da-wei et al. EXPERIMENT RESEARCH ON MECHANICAL BEHAVIOR OF NiTi SHAPE MEMORY ALLOY[J]. Architecture Technology, 2014, 45(10): 929-932.
