压力容器2017，Vol.34Issue(4)：48-54,47,8.DOI:10.3969/j.issn.1001-4837.2017.04.008
基于Schwartz-Neuman交替法的压力容器内接管表面裂纹的断裂力学分析
Fracture Mechanics Analysis of Surface Cracks on a Pressure Vessel Nozzle Based on Schwartz-Neuman Alternating Method
摘要
Abstract
The stress intensity factors (SIFs) of quartern-elliptical surface cracks at the nozzle-cyliner intersection of a typical reactor pressure vessel are computed using the Schwartz-Neuman alternating method,and the relationship between the SIFs and the geometry parameters of the surface cracks is analyzed.The SIFs of two types of surface cracks on a regular pipe are computed first to evaluate the accuracy of the Schwartz-Neuman alternating method by the comparison of the results given by,respectively,the Schwartz-Neuman alternating method and the analytical solutions.For the analysis of surface cracks at the nozzle-cylinder intersection of the typical reactor pressure vessel,the SIFs given by the Schwartz-Neuman alternating method agree well with the results obtained from the conventional finite element analysis reported in reference[4],but the number of finite elements and boundary elements used in the present computational model is less than one percent of that used in the conventional finite element model.The present study clearly shows that the Schwartz-Neuman alternating method can be efficiently and accurately used to evaluatethe SIFs of surface cracks of different shapes and depths on structural components with complicated geometries.关键词
压力容器/混合型表面裂纹/三维断裂力学模型/应力强度因子/Schwartz-Neuman交替法Key words
pressure vessel/mixed-mode surface crack/3D fracture mechanics model/stress intensity factors/Schwartz-Neuman alternating method分类
机械制造引用本文复制引用
杜青,石广玉..基于Schwartz-Neuman交替法的压力容器内接管表面裂纹的断裂力学分析[J].压力容器,2017,34(4):48-54,47,8.基金项目
国家自然科学基金项目(NSFC-91230113) （NSFC-91230113）
