含裂纹的梭形薄壁圆柱结构断裂力学计算分析研究

he stress intensity factor(SIF) is an important parameter which reflect the stress intensity at the tip of cracks. The study of SIF has a certain significance for crack extension and failure of structural . Based on J integration theory, fracture mechanical behavior of eccentric compression thin-walled shuttle cylinders structure with cracks was studied using the finite element method. The Influence of load, crack lengths, eccentricity and tapering ratio on stress intensity factor was analyzed numerically, The numerical results show that the crack lengths, load and tapering ratio have significant effects on the stress intensity factors .Moreover, there are three factors, crack lengths, load and tapering ratio, which influence each other. The simplified calculation formula of stress intensity factor of eccentrical compression thin-walled shuttle cylinders structure with cracks was proposed based on the numerical results. The results calculated by the simplified method were compared with the relevant stress intensity factors calculated by others and the comparisons show the feasibility of the simplified calculation method.)