形状记忆合金应力-应变关系的表征

The Expression of Shape Memory Alloy Stress-strain Relationship

在以 Tanaka、L iang、Brinson为代表的模型的基础上 ,对形状记忆合金的一维热力学关系提出了一个新的表达式 ,并用之表征了形状记忆合金不同温度下的应力 -应变关系。通过对 Ni Ti形状记忆合金薄带的应力 -应变的计算以及利用前人的试验数据和 Brinson模型的比较 ,验证了本模型的工程可用性。

Based on the model established by Tanaka,Liang and Brinson,this paper puts forward a new model for one dimensional thermolmechanics of shape memory alloy and expresses SMA stress strain relationship at different temperatures.Through the calculation of NiTi SMA belts stress strain relationship and comparing with Brinson's model using existed experiment data,it can be seen that the model is very useful in engineering.