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

doi:10.11896/cldb.19080147

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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.

Key words： shape memory alloy superelasticity hysteretic behavior strain amplitude strain rate Graesser constitutive model

Published: 14 July 2020

CLC number:

TG139.6

Fund:This work was financially supported by the National Natural Science Foundation of China (51678480), Basic Research Plan of Natural Science in Shaanxi Province, China (2019JQ-578), Project of Education Bureau of Shaanxi Province, China (18JK0332), Scientific Research Project of Key Laboratory of Shaanxi Education Bureau, China (17JS071), Key Laboratory Project of Shaanxi Science and Technology Coordinating Innovation Project, China(2014SZS04-P04).

About author:: Bo Liu, a Ph.D. student in structural engineering of the College of Civil Engineering, Xi'an University of Architecture and Technology and is conducting research under the guidance of Professor Wang Sheliang. At present, his main research fields are the smart mate-rials/structure and vibration control.
Sheliang Wang, a professor and doctoral supervisor of Xi'an University of Architecture and Technology. He is mainly engaged in research on smart materials and intelligent structural systems. He is currently the director of the Anti-seismic and disaster Prevention Branch of China Architecture Society, the vice-chairman of the China Infrastructure Optimization Research Institute Structural Engineering Specialized Committee, “Sanqin Talents” in Shaanxi Province, a review expert of the National Natural Science Foundation, the Post-doctoral Foundation and the Shaanxi Natural Science Foundation.He presided over one of the major research projects of the National Natural Science Foundation of China, one of the 973 pre-research projects, one of the 973 sub-projects, one of the key project of the National Natural Science Foundation of China and five projects on the National Natural Science Foundation of China. He has published more than 300 papers in academic journals at home and abroad, of which more than 180 have been included in SCI or EI.

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	LIU Bo
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Cite this article:

LIU Bo,WANG Sheliang,LI Binbin, et al. A Superelastic SMA Macroscopic Phenomenological Model Considering the Influence of Strain Amplitude and Strain Rate[J]. Materials Reports, 2020, 34(14): 14161-14167.

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http://www.mater-rep.com/EN/10.11896/cldb.19080147 OR http://www.mater-rep.com/EN/Y2020/V34/I14/14161

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