A Superelastic SMA Macroscopic Phenomenological Model Considering the Influence of Strain Amplitude and Strain Rate
LIU Bo1, WANG Sheliang1, LI Binbin1, 2, YANG Tao3, LI Hao1, LIU Yang3, HE Lu1
1 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China 2 Key Laboratory of Structural Engineering and Earthquake Resistance, Xi'an University of Architecture and Technology, Xi'an 710055, China 3 School of Urban Planning and Municipal Engineering, Xi'an Polytechnic University,Xi'an 710048, China
Abstract: In order to make full use of the damping performance of superelastic SMA and lay the theoretical foundation of application, the mechanical properties of SMA wires were tested, and the effects of cycle training times, strain amplitude and strain rate on the hysteretic performance of SMA were considered. Based on the mechanical test results of SMA wires, the Graesser macro phenomenological constitutive model was exten-ded under the frame of general visco-plasticity. The difference of characteristic parameters in the martensitic forward/reverse phase transition and the nonlinear hardening behavior under large strain amplitude were considered. Through the internal variable evolution equation introduced, the superelastic SMA macroscopic phenomenological constitutive model considering the influence of strain amplitude and strain rate was established. The superelastic SMA hysteretic curve was simulated by Matlab/Simulink module, and the predicted results were compared with the experimental results. The results show that the strain amplitude-strain rate dependent SMA macroscopic phenomenological constitutive model can accurately describe the superelastic behavior of SMA in the process of stress-induced phase transition, and can also reflect the influence of strain rate and strain amplitude on the hysteretic properties of SMA.
刘博, 王社良, 李彬彬, 杨涛, 李昊, 刘洋, 何露. 一种考虑应变幅值和应变速率影响的超弹性SMA宏观唯象本构模型[J]. 材料导报, 2020, 34(14): 14161-14167.
LIU Bo, WANG Sheliang, LI Binbin, YANG Tao, LI Hao, LIU Yang, HE Lu. A Superelastic SMA Macroscopic Phenomenological Model Considering the Influence of Strain Amplitude and Strain Rate. Materials Reports, 2020, 34(14): 14161-14167.
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2020, Vol. 34 
