Study on interface failure of shape memory alloy (SMA) reinforced smart structure with damages

• 来源期刊: 力学学报（英文版）
• 年，卷（期）: 2005,（3）
• 页码范围: 286-293
• 页数: 8页
• 语种: 英文

摘要

Shape memory alloy (SMA) reinforced smart structure can be used to make structural shape and strength selfadapted and structural damage self-restrained. Although SMA smart structures without damages were extensively studied,researches on SMA smart structures with damages have rarely been reported thus far. In this paper, thermo-mechanical behaviors of SMA fiber reinforced smart structures with damages are analyzed through a shear lag model and the variational principle. Mathematical expressions of the meso-displacement field and the stress-strain field of a typical element with damages are obtained, and a failure criterion for interface failure between SMA fibers and matrix is established,which is applied to an example. Results presented herein may provide a theoretical foundation for further studies on integrity of SMA smart structures.