含孔边裂纹球壳的断裂分析

Study on Spherical Shells with Cracks Emanating From a Hole

在依据Reissner理论得出的球壳裂纹尖端应力应变场展开式基础上,采用局部—整体分析法和权函数方法分别计算承受内压的含孔边裂纹球壳的应力强度因子.在有限元的模式中考虑剪切变形的影响,并对奇异元模式的应力应变场展开式的项数选择、奇异元最佳尺寸的选取进行了分析.本文计算和分析了在不同几何尺寸,不同开孔大小以及不同剪切参量条件下承受内压的含孔边裂纹球壳的应力强度因子及其变化规律.

On the basis of the expansion of stress-strain fields at crack tip in a spherical shell [1], the stress intensity factor of cracked spherical shells which have cracks emanating from a hole is obtained by using the local-global analysis method and the weight function method. Transverse shear deformations are taken into account in finite element modes. The choosing of the length of the expansion of stress-strain fields and the size of special element are analysed.