文献类型：期刊文献

英文题名：Failure analysis of outer ring of spiral wound gasket

作者：Zhong, Jiru[1];Liu, Dawei[2];Zhou, Tengfei[1];Guan, Kaishu[1]

机构：[1]East China Univ Sci & Technol, Sch Mech Engn, Shanghai 200237, Peoples R China;[2]Shanghai Chem Ind Pk Ind Gases Co Ltd, Shanghai 201507, Peoples R China

年份：2020

卷号：117

外文期刊名：ENGINEERING FAILURE ANALYSIS

收录：;EI(收录号：20204109307052);WOS:【SCI-EXPANDED(收录号:WOS:000582981800057)】；

基金：This work is supported by the China Postdoctoral Science Foundation (2019M661406).

语种：英文

外文关键词：Spiral wound gasket; Outer ring; Multi-source fatigue fracture; High local circumferential stress

摘要：Failure of spiral wound gaskets rarely occurs due to its outer ring. This paper presented a failure case of a spiral wound gasket owing to the rupture of the outer ring. A series of inspections including chemical, mechanical, metallographic and fractographic analysis were carried out to explore the failure mechanism of that ring. The results show that chemical compositions and mechanical properties of material agree with standard requirements and failure is related to multi-source fatigue fracture. Serious plastic deformation is found near the fracture region. It is owing to squeeze between the bolt and the outer ring, causing a high local circumferential stress. Fatigue fracture occurs when the outer ring is subjected to alternating loads under the high stress. The factors causing fracture of the outer ring were discussed and suggestions were also given for avoiding this failure.