形状记忆合金在复合材料损伤监测中的应用

复合材料的损伤会对结构的可靠性和安全性造成威胁，近年来引起国内外专家和学者的广泛关注。本文将形状记忆合金(SMA)埋入复合材料试件中，通过对SMA电阻变化与复合材料应变之间的关系进行讨论，建立不同监测条件下复合材料的损伤监测理论模型。基于该模型讨论了不同初始状态下SMA材料的损伤监测行为。研究结果表明:复合材料的损伤与SMA电阻变化呈线性关系，温度荷载在SMA未发生相变时对损伤监测影响较小，在SMA发生相变时对损伤监测影响较大。本研究可为基于SMA的复合材料损伤监测理论的进一步工程应用提供理论指导。 

Application of shape memory alloy in damage monitoring of composite materials

The damage of composite materials poses a threat to the reliability and safety of the structure, and has attracted widespread attention from domestic and foreign experts and scholars in recent years. This study embeded the shape memory alloy (SMA) in the composite material specimen, and discussed the relationship between the SMA resistance change and the composite material strain, established theoretical models of composite damage monitoring under different monitoring conditions. Based on this model, the damage monitoring behavior of SMA materials in different initial states was discussed. The research results show that the damage of the composite material has a linear relationship with the resistance change of the SMA. The temperature load has little influence on the damage monitoring when the SMA does not undergo a phase change, and has a greater influence on the damage monitoring when the SMA undergoes a phase change. The research can provide theoretical guidance for the further engineering application of SMA-based composite damage monitoring theory.