文献类型：期刊文献

英文题名：A procedure for treating secondary stress in failure assessment diagram

作者：Pan, HL; Li, PN

年份：1997

卷号：58

期号：1-2

起止页码：149

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:A1997YE79100012)】；

语种：英文

外文关键词：welding residual stress; failure assessment method; rho factors

摘要：The CEGB R6 Rev.3 failure assessment method, for structures containing defects subjected to combined primary and secondary loads, is widely adopted all over the world. A set of rho factors, which was derived by Ainsworth according to a deformation bounding theorem and the concept of reference stresses, has been given in the revision. However, the results obtained with those rho factors are unsafe when a small defect is located within a high tensile residual stress zone, and are over-conservative in other situations. In this paper, recommended rho values based on R6 option 1 are given by redefining the reference stress under pure secondary loads. The recommended rho factors overcome the above-mentioned shortcomings of R6 Rev.3. This procedure has been accepted in the Chinese ''A Guidance of Safety Assessment for Pressure Vessel Containing Defects'' (SAPV-95).