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将固体推进剂/衬层粘结界面层按照剪切模量的变化分成三部分,由此建立了其界面脱粘裂纹的三区域界面层模型。应用Fourier积分变换和传递矩阵方法,推导并数值求解Cauchy奇异积分方程,得到了反平面剪切状态下裂纹问题的半解析解,并讨论了界面层模量和厚度对断裂参量的影响。结果表明,界面层模量随贮存时间的延长而降低时,应力强度因子逐渐减小,但裂纹张开位移变化不大;界面层厚度对应力强度因子的影响则不明显。
The solid propellant / liner adhesion interface layer is divided into three parts according to the change of shear modulus, and a three-zone interface layer model of interface debonding crack is established. By applying Fourier integral transformation and transfer matrix method, the Cauchy singular integral equation is deduced and numerically solved. The semi - analytical solution to the crack problem in the anti - plane shear state is obtained. The influence of interface modulus and thickness on the fracture parameters is also discussed. The results show that the stress intensity factor decreases gradually when the interface layer modulus decreases with the storage time, but the crack opening displacement does not change much. The influence of interface layer thickness on the stress intensity factor is insignificant.