NiTi形状记忆合金电阻特性研究

Study on Electrical Resistance Properties of NiTi Shape Memory Alloy

建立了NiTi形状记忆合金的电阻特性模型,分析了不同温度条件下,NiTi形状记忆合金不同相的电阻相对变化与应变之间的关系.对NiTi形状记忆合金丝的电阻特性进行了试验研究,验证了该模型的有效性.当利用NiTi形状记忆合金制作传感元件时,应根据使用条件来确定NiTi形状记忆合金的相变温度.

To better utilize the electrical resistance of shape memory alloy（SMA） for health monitoring and designing SMA sensor, a model of electrical resistance properties of NiTi SMA is developed. The relationship between the relative variation of electrical resistance and the strain of NiTi SMA with different phases is analyzed under different temperatures by using this model. And the corresponding experiments have been conducted on NiTi SMA wires, through which the validity of this model is verified. When NiTi SMA is employed as a sensing element, the transformation temperatures of NiTi SMA should be determined under application conditions.