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首页> 外文期刊>Journal of Materials Engineering and Performance >Theoretical and Experimental Study of the Shape Memory Effect of Beams in Bending Conditions
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Theoretical and Experimental Study of the Shape Memory Effect of Beams in Bending Conditions

机译：弯曲条件下梁的形状记忆效应的理论和实验研究

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摘要

In this study, the shape memory effect of SMA beams under complex stress conditions is studied by means of a finite element model. The 1D version of a well-established SMA constitutive model is utilized in the numerical computations and the required parameters are obtained experimentally starting from thermal cycling tests in tension under different constant loads. After being calibrated, the model is used to compute the deformation of beams loaded in bending and undergoing thermal cycling; three-point bending and cantilever configurations are considered in this stage. Finally, the response predicted by the model is compared to experimental results and model capabilities are discussed. In particular, insight of the stress and strain evolution in bending is provided.
机译：在这项研究中，通过有限元模型研究了SMA梁在复杂应力条件下的形状记忆效应。在数值计算中使用了公认的SMA本构模型的1D版本，并从不同恒定载荷下的拉伸热循环试验开始，通过实验获得了所需的参数。校准后，该模型用于计算在弯曲和热循环中加载的梁的变形。在此阶段考虑三点弯曲和悬臂结构。最后，将模型预测的响应与实验结果进行比较，并讨论模型的功能。特别地，提供了弯曲中应力和应变演变的见解。

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