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从细观角度出发,运用变分原理对含损伤形状记忆合金(SMA)增强智能结构的热、力学行为进行了分析,导出了含损伤SMA增强智能结构的控制方程,给出了含损伤典型单元体的细观位移场、应力应变场的数学描述,建立了SMA增强智能结构的界面失效判据.在界面失效判据中,不仅包含了力载荷和温度载荷2种激励,其中温度激励隐含在有效自由回复应变当中,还包含了界面性能、SMA热力学性能、界面初始脱粘长度等因素.这些结果对认识含损伤SMA增强智能结构的强度自适应控制及其失效机理有一定意义,同时为进一步研究智能结构的完整性提供了相应的理论支持.
From a micro perspective, using the variational principle to analyze the thermal and mechanical behaviors of an SMA reinforced smart structure, the governing equations of the smart SMA structure with the damaged SMA are derived, The mesoscopic displacement field and the stress-strain field, the interface failure criterion of SMA-enhanced intelligent structure is established.At the interface failure criterion, not only the two kinds of stimuli load including force load and temperature load are implied, In the effective free response, it also includes such factors as interface properties, SMA thermodynamic properties, initial debonding length of the interface, etc. These results are of some significance for understanding the adaptive control of strength and failure mechanism of smart structures with damaged SMA, and meanwhile Further research on the integrity of intelligent structures provides the corresponding theoretical support.