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Dynamic response of interfacial finite cracks in orthotropic materials subjected to concentrated loads

机译:正交载荷下正交异性材料界面有限裂纹的动力响应

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摘要

The elastodynamic response of an infinite non-homogeneous orthotropic material with an interfacial finite crack under concentrated normal and shear impact loads is examined. Solution for the stress intensity factor history around the crack tips is found. Laplace and Fourier transforms are employed to solve the equations of motion leading to a Fredholm integral equation on the Laplace transform domain. The dynamic stress intensity factor history can be computed by numerical Laplace transform inversion of the solution of the Fredholm equation. Numerical values of the dynamic stress intensity factor history for some materials are obtained. Interfacial cracks between two different materials and between two pieces of the same material but different fiber orientation are considered. This solution can be used as a Green’s function to solve dynamic problems involving interfacial finite cracks in orthotropic bimaterials.
机译:研究了在集中法向和剪切冲击载荷作用下具有界面有限裂纹的无限非均质正交各向异性材料的弹性动力学响应。找到了裂纹尖端周围应力强度因子历史的解。拉普拉斯和傅立叶变换用于求解运动方程,从而在拉普拉斯变换域上生成Fredholm积分方程。动应力强度因子历史可以通过Fredholm方程解的数值Laplace变换反演来计算。获得了某些材料的动态应力强度因子历史记录的数值。考虑了两种不同材料之间以及两片相同材料之间但纤维取向不同的界面裂纹。此解决方案可以用作格林函数来解决涉及正交各向异性双材料中界面有限裂纹的动力学问题。

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