拉弯组合载荷作用下孔边含椭圆拐角裂纹平板的极限载荷分析

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基金项目:

国家“十一五”科技支撑项目(2006BAK02B02)

国家863项目(2007AA04Z430)资助

Limit Load Analysis for Plates with Elliptical Corner Cracks at Hole under Combined Tension and Bending Loads

1. Institute of Process Equipment and Control Engineering, Zhejiang University of Technology, The MOE Key Laboratory of Pharmaceutical Engineering, Hangzhou, 310032, China;
2. Zhejiang Pharmaceutical College, Ningbo, Zhejiang, 315100, China

摘要: 基于净截面垮塌准则导出了拉弯组合载荷作用下孔边含椭圆拐角裂纹平板的整体极限载荷解析解。对处于拉弯组合载荷作用下的理想弹塑性材料进行了三维有限元分析。计算了不同裂纹深度(α=0.2,0.4,0.6,0.8)、不同裂纹形状(a/c=1.0,0.4,0.2)在不同的载荷作用下(λ=0,0.25,1,∞)的极限载荷。有限元解与解析解的结果误差<20%,解析解偏于安全。
- 极限载荷 /
- 椭圆拐角裂纹 /
- 平板 /
- 拉弯组合载荷
Abstract: A global limit load solution is derived for plates with elliptical corner cracks at a hole under combined tension and bending loads,based on the net-section collapse principle.The limit load solution is compared with the results of elastic-plastic finite element analysis for the plates with elliptical corner cracks at a hole for different crack sizes,a/t = 0.2,0.4,0.6,0.8,a/c = 1.0,0.4,0.2 and different loads,λ = 0,0.25,1,∞.The results show that the analytical solutions of the global limit load are conservative and close to the elastic-plastic FE results.The maximum difference between the analytical solutions and the FEA results is less than 20%.
- Limit load /
- Elliptical corner cracks /
- Plate /
- Combined tension and bending loads