柔度法计算Zr-4合金包壳管轴向裂纹应力强度因子的研究  

Calculation of Stress Intensity Factor of Zr-4 Cladding Tube by Flexibility Method

作　　者：陈亮[1] 宋小明[1] 庞华[1] 王克成 霍蒙[1] 曾祥国[2] Chen Liang;Song Xiaoming;Pang Hua;Wang Kecheng;Huo Meng;Zeng Xiangguo(Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu,610213,China;Sichuan University,Chengdu,610065,China)

机构地区：[1]中国核动力研究设计院核反应堆系统设计技术重点实验室,成都610213 [2]四川大学,成都610065

出　　处：《核动力工程》2019年第5期202-206,共5页Nuclear Power Engineering

基　　金：核动力创新中心2018年基金项目(HDLCXZX-2018-HD-014-01)

摘　　要：基于虚拟裂纹闭合法,利用控制单变量变化的方法,对含对称双边缘裂纹的薄壁圆柱壳受对称集中力的情况进行了数值建模,得到了裂纹尖端的能量释放率,分析了Zr-4合金包壳管的预制裂纹长度和外部载荷对应力强度因子的影响作用。使用柔度法计算并获得了应力强度因子的近似计算公式,并与数值计算结果进行了对比验证,验证结果吻合较好。Based on the virtual crack closure technology(VCCT),by using the method of single variable control changes,the numerical model is established in the light of the symmetric double edge crack in thin-walled cylindrical shell by symmetrical concentrated force.The crack tip energy release rate is obtained.The effect of the Zr-4 alloy cladding tube prefabricated crack length and external load on the stress intensity factor is analyzed.The approximate formula of stress intensity factor(SIF)was obtained by using the flexibility method.The validation results are in good agreement with the numerical results.

关 键 词：ZR-4合金 能量释放率 应力强度因子 燃料元件包壳管 

分 类 号：TL27[核科学技术—核燃料循环与材料]