Study on behaviors of functionally graded shape memory alloy cylinder
Study on behaviors of functionally graded shape memory alloy cylinder
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功能梯度形状记忆合金圆柱体行为研究
DOI:
10.1016/j.camss.2017.11.004
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发表时间:
2017-12
影响因子:
2.2
通讯作者:
Zhang Pan
中科院分区:
文献类型:
--
作者:
Liu Bingfei;Wang Qingfei;Zhou Rui;Du Chunzhi;Zhang Yanan;Zhang Pan
For better controllability in actuations, it is desirable to create Functionally Graded Shape Memory Alloys (FG-SMAs) in the actuation direction. It can be achieved by applying different heat treatment processes to create the gradient along the radius of a SMA cylinder. Analytical solutions are derived to predict the macroscopic behaviors of such a functionally graded SMA cylinder. The Tresca yield criterion and linear hardening are used to describe the different phase transformations with different gradient parameters. The numerical results for an example of the model exhibit different pseudo-elastic behaviors from the non-gradient case, as well as a variational hysteresis loop for the transformation, providing a mechanism for easy actuation control. When the gradient disappears, the model can degenerate to the non-gradient case.
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