温度影响下形状记忆合金/橡胶复合材料界面力学性能  

The mechanical interface properties of shape memory alloy/rubber composite under temperature effect

作　　者：邹阳[1] 李旭[1] 朱四荣[1] ZOU Yang;LI Xu;ZHU Sirong(Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学新材料力学理论与应用湖北省重点实验室,武汉430070

出　　处：《实验力学》2020年第5期859-866,共8页Journal of Experimental Mechanics

基　　金：国家自然科学基金(11502181);中央高校基本科研业务费专项资金(2017IB009)。

摘　　要：为研究温度影响下形状记忆合金/橡胶复合材料的界面力学特性,开展了NiTi形状记忆合金(SMA)/橡胶试样的单丝拔出实验,得到了不同温度作用下的NiTi形状记忆合金/橡胶复合材料的界面力-位移曲线,分析了温度联合预应变对NiTi形状记忆合金与橡胶基体界面黏结性能的影响,揭示了温度与预应变对NiTi形状记忆合金与橡胶界面的作用机理。结果表明,温度影响材料及界面力学性能,使得未经预拉伸的NiTi形状记忆合金/橡胶复合材料的界面力会随着温度的升高而有所降低;但在2.2%预应变的联合作用下,由于回复应力的贡献,NiTi形状记忆合金增强橡胶复合材料的界面力会随着温度的升高而增大,但界面脱黏位移均减小;由于SMA/橡胶与SMA/树脂不同的界面条件及其对形状记忆合金相变状态的影响,SMA/橡胶与SMA/树脂的拉拔力学性能不尽相同。In order to study the effect of temperature on the interfacial mechanical properties of shape memory alloy reinforced rubber composites, the pull-out experiments of NiTi shape memory alloy(SMA) reinforced rubber samples were carried out. The interface force-displacement curves of NiTi shape memory alloy reinforced rubber composites at different temperatures were obtained. The effects of temperature combined with prestrain on the interfacial bonding performance of NiTi shape memory alloy with rubber matrix were analyzed. The mechanism of temperature and prestrain on the interface between NiTi shape memory alloy and silicone rubber was revealed.The results show that temperature affects the mechanical properties of materials and the interface, thus the interface force of the unprestrained NiTi shape memory alloy reinforced rubber composites decreases with the increase of temperature. However, under the combined action of 2.2% pre-strain, the interface force of NiTi shape memory alloy reinforced rubber composite increases with the increase of temperature due to the contribution of recovery stress. The interface debonding displacement decreases in both cases. The pull-out mechanical properties of SMA/rubber and SMA/resin are different due to the different interface strength of SMA/rubber and SMA/resin and the effect of interfacial strength on the phase transition state of shape memory alloy.

关 键 词：形状记忆合金 橡胶 界面力学性能 温度 预应变 单纤维拔出 

分 类 号：O348[理学—固体力学] TB333[理学—力学]