压力容器开孔接管处表面斜裂纹应力强度因子数值分析

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基金项目:

武汉市科技局科技攻关项目(200860423293)

Numerical Analysis of Stress Intensity Factor of Surface Inclined Cracks at Intersection of Cylindrical Vessels and Nozzles

1. School of Mechanical Engineering, Wuhan Institute of Technology, Wuhan, 430074, China;
2. Wuhan Subsidiary Company, China Petrochemical, Co. Ltd., Wuhan, 430082, China;
3. China Shipbuilding Industry Special Equipment Co. Ltd., 430071, Wuhan, China

摘要: 通过在裂纹前沿设置奇异单元,建立了圆筒形压力容器开孔接管处表面斜裂纹断裂力学有限元分析模型;运用可视化编程语言VB编制了压力容器开孔接管处表面斜裂纹应力强度因子参数化分析软件,实现了与有限元分析软件ANSYS的连接与调用;根据内压作用时多种几何参数情况下应力强度因子的计算值,绘制了裂纹前沿应力强度因子随裂纹相对深度、裂纹对应弧度、支管与主管直径比及裂纹倾斜角的变化曲线。
- 开孔接管 /
- 应力强度因子 /
- 表面斜裂纹 /
- 奇异单元
Abstract: A fracture mechanics finite element analysis model of cylindrical pressure vessel with an opening nozzle is established through setting singular elements in the forefront of cracks.A stress intensity factor（SIF） automatically-calculated software of surface inclined cracks at the intersection of cylindrical vessels and nozzles which can be communicated with ANSYS program is programmed with Visual Basic.Based on the calculated SIF values of the cracks of different geometrics subjected to internal pressure,the SIF curves varying with relative depths of cracks,crack relative radians,diameter ratio of vessels and nozzles and crack inclined angle have been obtained.
- Opening nozzle /
- Stress intensity factor /
- Surface inclined crack /
- Singularity