大连理工大学学报2012，Vol.52Issue(4)：487-491,5.
多荷载联合作用下含穿透裂纹接管安全评定
Safety assessment for nozzle containing through-wall crack under multiple loads
喻健良 1董硕 2闫兴清 1刘明1
作者信息
- 1. 大连理工大学化工机械学院,辽宁大连116024
- 2. 大连理工大学化工机械学院,辽宁大连116024 中国纺织工业设计院,北京100037
- 折叠
摘要
Abstract
There are still no reliable approaches to safety assessment on pressure vessels containing defects under multiple loads now. The 3D finite element method was adopted to calculate fracture ratio and load ratio used in safety assessment for nozzle containing through-wall crack at the shoulder under the combination of internal pressure and moment. Research results indicate that fracture ratio can be obtained by the stress intensity factor K~, of crack under internal pressure and moment, which is the summation of stress intensity factor of crack under internal pressure and that under moment. Load ratio can be obtained by actual external loads, limit internal pressure p and limit moment rn, and the relation between p and m fits the linearity equation. Therefore, safety assessment of nozzle containing through-wall crack at the shou[der under internal pressure and moment can be accomplished.关键词
安全评定/穿透裂纹/断裂比/荷载比/应力强度因子/极限荷载Key words
safety assessment/through-wall crack/fracture ratio/load ratio/stress intensity factorlimit load分类
数理科学引用本文复制引用
喻健良,董硕,闫兴清,刘明..多荷载联合作用下含穿透裂纹接管安全评定[J].大连理工大学学报,2012,52(4):487-491,5.
