接管高应变区应力强度因子的计算  

Calculating analysis of stress intensity factors at the junction within high strain gradient

作　　者：崔建华[1] 

机构地区：[1]安徽建筑工业学院土木工程系,合肥230022

出　　处：《安徽建筑工业学院学报（自然科学版）》2005年第5期29-32,共4页Journal of Anhui Institute of Architecture(Natural Science)

基　　金：安徽省自然科学基金(050440506);安徽省教育厅自然科学重点科研计划项目资助(2004kj090zd)

摘　　要：针对压力容器接管区处于高应变梯度区和具有严重的应力集中现象的特征,依据模拟试板应力应变场的光弹性试验分析,对接管区建立有限元模型,保证单元的协调性,分析了裂纹尖端处应力强度因子,计算结果表明获得的应力强度因子与试验结果较为吻合,为压力容器接管部位的设计和裂纹疲劳扩展分析提供了参考依据。Due to the severe stress concentration phenomenon and the characteristic of high strain gradients at the junction between pressure vessel shell and nozzle, based on simulating shape plate of pressure vessel nozzle, some types of special shape plates is carried out and the finite element models are established by using singular isoparametric element. The stress intensity factors around crack are obtained by means of FEM which guarantees harmony of conjoint elements. The calculation results are in accordance with those of experimental results. This study provides a reliable basis for the design of at the junction between pressure vessel shell and nozzle and analysis of extending crack.

关 键 词：接管 应力强度因子 有限元 计算 

分 类 号：TU33[建筑科学—结构工程]