
第35卷第1期 2015年
3月
核科学与工程
Nuclear Science and Engineering
Vol.35
No.1
Mar.2015
两裂纹在核管道中应力强度因子的
相互影响研究
白鑫,谢里阳(东北大学,沈阳110819)
摘要:随着核电站的老化,核管道安全评估变得更为重要,!
以往核管道的损伤容限评定通常只考虑单
裂纹间题,或只局限于研究一个主裂纹的问题,或主要集中于考虑两个裂纹满足何条件时,二者方可合并为一个裂纹的问题,对多裂较情况下应力强度因子变化规律的研究较粗糙。在理论与方法方面,多裂纹间题一直是断裂力学不够完善的部分。本文以核管道的内表面裂纹为对象,采用有限元法分析核曾道两个裂纹情况下的应力强度因子,得到其随裂纹间距、裂纹长度、裂纹深度变化的规律,又两个裂纹的现象为多裂纹现象中最基本的情况,即本研究工作可为存在多裂纹的核管道的安全评估提供方法依据。
关键调:核管道;内表面,两裂纹;表面裂纹;应力强度因子
中图分类号:X946
文章标志码:A
文章编号:0258-0918(2015)01-0174-07
TheStressIntensityFactorVariationof Two Cracks Interaction in Nuclear Piping
BAI Xin, XIE Li-yang
(College of Mechanical Engineering &. Automation, Northeastern University,
Shenyang of Liaoning Prov, 110819, China)
Abstract: With the aging of nuclear power plants, safety assessment for nuclear pipeline becomes more important, In the past, the assessment of nuclear piping only consider a single crack problem; or confined to the issue of a main crack; or focused on considering two cracks meeting any condition to be merged into one crack, namely, detailed study on multiple cracks under the stress intensity factor variation is rough. It is not a perfect part of fracture mechanics for multiple crack problems, In order to improve the content of fracture mechanics, fracture mechanics applied to increase the value and improve the safety and reliability of nuclear piping, inner surface cracks is determined as the major
收稿日期:2013-09-24;修回日期:2014-03-27
基金项目:国家自然科学基金项目(51335003);国家自然科学基金(51175072);高等学校博士学科点专项科研基金资助课题(优先发展领城)(20110042130003)
作奢篇介:白鑫(1988一),男,内蒙古人,博士,现从事疫劳、断装、可靠性的研究 174