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Simulation of shape memory alloy wire actuator behavior under arbitrary thermo-mechanical loading

机译：形状记忆合金线致动器在任意热力作用下的行为模拟

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摘要

Shape memory alloy (SMA) wires are becoming potential candidates as actuators due to their high stress-generating and strain-recovery capabilities. As actuators, these wires undergo arbitrary thermo-mechanical loading. For an efficient design, one requires a model to simulate their behavior under any stress-temperature situation. In this study, based on an existing phase kinetics dependent phenomenological model, an algorithm capable of simulating SMA wire behavior under an arbitrary loading situation has been developed and implemented. To demonstrate this, two cases have been simulated. In the first case, the behavior of an SMA wire undergoing varying stress and temperature while actuating a single degree of freedom manipulator has been simulated. The results are found to illustrate the discrepancies reported in the literature. The behavior of two antagonistically placed and independently activated SMA wires is modeled and simulated in the second case, where the results qualitatively agree with the existing experimental results.
机译：形状记忆合金（SMA）导线具有很高的应力产生和应变恢复能力，因此正成为执行器的潜在候选者。作为执行器，这些导线承受任意的热机械载荷。为了进行有效的设计，需要一个模型来模拟它们在任何应力-温度情况下的行为。在这项研究中，基于现有的依赖于相动力学的现象学模型，已经开发并实现了一种能够在任意载荷情况下模拟SMA线行为的算法。为了证明这一点，已经模拟了两种情况。在第一种情况下，已模拟了SMA线在驱动单自由度操纵器时承受变化的应力和温度的行为。发现结果说明了文献中报道的差异。在第二种情况下，模拟并模拟了两条拮抗放置且独立激活的SMA线的行为，其结果在质量上与现有实验结果一致。

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