主动控制裂纹智能复合构件的有限元分析

FINITE ELEMENT ANALYSIS OF SMART STRUCTURESFOR ACTIVE CRACK CONTROL

从形状记忆合金（ＳＭＡ）的本构关系出发，利用Ｔａｙｌｏｒ展开进行线性化处理，获得了线性化的ＳＭＡ本构关系式，在此基础上提出了拟温度载荷法，并利用这种方法直接应用现有的有限元程序对控制裂纹的ＳＭＡ智能复合构件进行了计算与分析。通过计算和实验对比分析，说明了应用本文中提出的拟温度载荷法模拟ＳＭＡ的回复效应是可行的；同时也表明ＴｉＮｉ薄带对构件裂纹有很好的控制作用。

Based on Tanaka and Liang's constitutive model of shape memory alloys, the linearized constitutive relation of SMA, embedded in matrix, was derived. Such a constitutive relation can easily be used in commercial finite element programs to treat the shape memory effect as the thermal effect of conventional materials. An intelligent structure, made up with TiNi belts embedded in the metal matrix to actively control the crack in the matrix, was analyzed using the method. Comparison of the calculated and test results shows that the method is practicable.