直管环向贯穿裂纹应力强度因子的有限元无网格耦合计算方法

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FE-Meshfree Coupled Method for Calculating Stress Intensity Factor of Circumferential Through-Wall Crack on Pipes

1. National Key Laboratory of Reactor System Design Technology, Nuclear Power Institute of China, Chengdu, 610041, China;
2. Department of Engineering Mechanics, Chongqing University, Chongqing, 400044, China

摘要: 使用先进的有限元和无网格耦合方法进行了含环向贯穿裂纹直管的断裂力学分析。该方法把高应力梯度区域划分为无网格区域,其余区域划分为有限元区域(FE),使用转换矩阵实现了有限元区域与无网格区域的自然耦合,保证了两种区域在交界面上的位移连续性要求。用该耦合方法计算了直管环向贯穿裂纹应力强度因子,得到的结果与有限元计算软件ABAQUS结果一致,验证了该方法的可行性和有效性。
- 无网格 /
- 耦合方法 /
- 贯穿裂纹 /
- 应力强度因子
Abstract: Based on a transition matrix used to couple the finite element method and meshfree method, a coupled method was developed, in which the part with high gradient stress was set as the meshfree domain, and the remainder part was finite element domain. With this method, the stress intensity factors in one cracked through-wall pipe with circumferential crack were calculated, and the result was consistent with those calculated with ABAQUS code, which proved the feasibility and validity of the current method.
- Meshfree /
- Coupled Method /
- Through-Wall Crack /
- Stress Intensity Factor