Weight Function for Stress Intensity Factors in Rotating Thick-Walled Cylinder
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摘要: 采用厚壁筒在内压作用下的应力强度因子作为参考载荷的应力强度因子，通过权函数方法推导出了内壁带二维径向边裂纹的旋转厚壁筒的应力强度因子公式．这些公式可用于计算旋转厚壁筒在不同裂纹深度、转速、材料和尺寸情况下的应力强度因子．算例表明该文的公式具有良好的精度．同时还研究了旋转圆筒应力强度因子随裂纹深度和内外径比之间的变化规律，方便了工程应用．Abstract: The equation of stress intensity factors of internally pressurized thick_walled cylinder was used as the reference case'sIF equation of rotating thick_walled cylinder containing a radial crack along the internal bore was presented in weight function method.The weight function formulas were worked out and can be used for all kinds of depth of cracks,rotating speed,material,size of thick_ walled cylinder to calculate the stress intensity factors.The results indicated the validity and effectiveness of these formulas.Meanwhile,the rules of the stress intensity factors in rotating thick_walled cylinder with the change of crack depths and the ratio of outer radius to inner radius were studied. The studies are valuable to engineering application.
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Key words:
- fracture mechanics /
- weight function method /
- rotating cylinder /
- edge crack
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