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首页> 外文会议>International Conference on Advances in Mechanical Engineering and Mechanics >Modeling of Iron Based Shape Memory Alloys Behavior Within Finite Strain Formulation
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Modeling of Iron Based Shape Memory Alloys Behavior Within Finite Strain Formulation

机译：有限菌株配方中铁基形状记忆合金行为的建模

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This paper presents a finite-strain thermomechanical constitutive model for Iron based Shape Memory Alloys (Fe-SMAs). The model considers the multiphysical coupling between the phase transformation and the plasticity which distinguishes Fe-SMAs from classical SMAs (Ni-Ti and Copper based ones). Based on the multiplicative decomposition of deformation gradient into elastic, transformation and plastic components, the model is developed within a thermodynamically consistent framework. Model constitutive equations associated with the internal variables (volume fraction of martensite χ and the accumulative plastic strain γ) are derived from the reduced form the constructed Lagrangian, which is the sum of the Helmholtz free energy function and the inner potential, and the Clausius-Duhem inequality. The model is used to simulate tensile experiments on Fe-SMAs specimens at different thermomechanical loadings. The good agreement of the model predictions demonstrates the capabilities of the proposed model to well the specific behavior of Fe-SMAs.
机译：本文介绍了铁基形状记忆合金（FE-SMA）的有限应变热机械结构型模型。该模型考虑相变与区分Fe-Smas（Ni-Ti和基于铜的塑性的塑性之间的多体耦合。基于变形梯度成弹性，变换和塑料部件的乘法分解，该模型是在热力学上一致的框架内开发的。模型与内部变量相关的结构剖视图（马氏体的体积分数χ和累积塑性菌株γ）源自构造的拉格朗日的缩减形式，这是亥姆霍兹自由能功能和内部电位的总和，以及克劳斯 - DUHEM不平等。该模型用于模拟不同热机械载荷的Fe-SMA标本上的拉伸实验。模型预测的良好一致性展示了所提出的模型的能力，以良好的FE-SMA的特定行为。

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