NiTi纤维增强粘弹性基体与弹性基体复合材料的力学特性

Mechanic behavior of the viscoelastic and the elastic matrix composites with NiTi fiber

借助Voigt混合律,针对马氏体逆相变过程,建立了NiTi纤维增强Kelvin粘弹性基体与弹性基体两种复合材料的应力-应变关系。在同样的升温过程及应力作用下,对两种复合材料的变形(应变)、约束态NiTi纤维逆相变开始温度进行了分析对比;升温、加载经历一段时间后,限制两种复合材料的应变为固定值,分析其受力特征。分析有助于了解NiTi纤维增强粘弹性基体与弹性基体复合材料的力学性能。

Based on the Voigt model, the relations of stress-strain in the Kelvin viscoelastic and the elastic matrix composites with NiTi fiber were established during the reverse transformation. Under constant stress and the heating, the deformation（strain） characteristics of the Kelvin viscoelastic matrix composite with NiTi fiber and the effective austenite start temperature of the constrained NiTi fiber were investigated and different from those of the elastic matrix composite with NiTi fiber; Under constant stress and the heating during some time, if the composites were held at constant strain, the stress jump of the Kelvin viscoelastic matrix composite with NiTi fiber occured, but the stress of the elastic matrix composite with NiTi fiber was continued.