用奇异有限元法计算正交各向异性复合材料平面断裂的应力强度因子

Calculation of the Stress Intensity Factor in Orthotropic Composite Plane Fracture Using the Singular Finite Element Method

将复合材料平板视为正交各向异性平板，把正交各向异性平板裂纹顶点附近的位移展开式迭加在一般的等参数单元上，建立了用于复合材料平板应力强度因子计算的奇异元。并以所给出的公式，对正交各向异性板含单边裂纹和双边裂纹问题进行了计算分析，取得了较好的效果。

y regarding the composite plate as the orthotropic plate and superposing the displacement near the crack top of the plate upon the general isoparametric element, the singular element for calculation of the stress-intensity factor of the composite plate is built. According to the suggested formulae, an analysis for the orthotopic plate with single and double edged cracks is presented. The calculated results are satisfatory.