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Modeling of Two-Way Shape Memory Effect Based on Phase Interaction Energy Function

机译：基于相相互作用能函数的双向形状记忆效应建模

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摘要

We present an analysis on a complicated combined process of martensitic transformation and two-way shape memory effect due to cyclic loadings of stress and heat in order to further develop the constitutive model of an SMA wire which is based on the phase interaction energy function proposed in our previous studies. Stress-induced martensitic transformation is modeled by introducing residual martensite in the transformation process between austenite and detwinned martensite. As for heat-induced two-way shape memory effect, it is assumed that a mixed-state of austenite and residual detwinned martensite changes into another mixed-state of twinned and detwinned martensites during cooling of the alloy, whereas a reversal change between the mixed-states occurs during heating. To examine the effectiveness of this analytical model based on the phase interaction energy function, an experiment is performed using a uniform SMA wire. Numerical analysis is carried out to compare with experimental data on the stress-induced martensitic transformation and the heat-induced two-way shape memory effect, which reveal very complicated training effect.
机译：我们提出了一个复杂的马氏体相变和双向形状记忆效应的组合过程，该过程是由应力和热的循环载荷引起的，以便进一步开发基于SMA相线能量函数的SMA线本构模型。我们以前的研究。应力诱导的马氏体相变是通过在奥氏体和脱马氏体之间的相变过程中引入残余马氏体来建模的。关于热诱导的双向形状记忆效应，假定在合金的冷却期间，奥氏体和残余的脱孪晶马氏体的混合状态变为孪晶和脱孪晶马氏体的另一混合状态，而混合状态之间的反转变化。 -状态在加热期间发生。为了检查基于相相互作用能函数的此分析模型的有效性，使用均匀的SMA导线进行了实验。进行了数值分析，与应力诱发的马氏体相变和热诱发的双向形状记忆效应的实验数据进行了比较，揭示了非常复杂的训练效果。

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