Structural fatigue and fracture of shape memory alloy actuators: Current status and perspectives
Structural fatigue and fracture of shape memory alloy actuators: Current status and perspectives
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DOI：
10.1177/1045389x211057216
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发表时间：
2021-11
影响因子：
2.7
通讯作者：
M. Hasan;T. Baxevanis
中科院分区：
文献类型：
--
作者：
M. Hasan;T. Baxevanis
形状记忆合金（SMA）-当需要小体积和/或大的力和行程时，致动器是传统致动器的高效、简单和鲁棒的替代品。分析其故障响应对于其设计至关重要，以便实现最佳功能和性能。在这里，（i）现有的知识基础上的疲劳和过载断裂响应的SMA下驱动加载的审查有关的失效微观机制，经验关系的驱动疲劳寿命预测，实验测量的断裂韧性和疲劳裂纹扩展速率，和数值研究的韧性性能和（ii）未来的发展需要扩大所获得的知识，提高目前的理解，并最终使SMA致动器的商业应用进行了讨论。
Shape Memory Alloy (SMA)-actuators are efficient, simple, and robust alternatives to conventional actuators when a small volume and/or large force and stroke are required. The analysis of their failure response is critical for their design in order to achieve optimum functionality and performance. Here, (i) the existing knowledge base on the fatigue and overload fracture response of SMAs under actuation loading is reviewed regarding the failure micromechanisms, empirical relations for actuation fatigue life prediction, experimental measurements of fracture toughness and fatigue crack growth rates, and numerical investigations of toughness properties and (ii) future developments required to expand the acquired knowledge, enhance the current understanding, and ultimately enable commercial applications of SMA-actuators are discussed.