文献类型：期刊文献

英文题名：Notch Effect on Structural Strength of Components at Elevated Temperature Under Creep, Fatigue, and Creep-Fatigue Loading Conditions: Phenomenon and Mechanism

作者：Gong, Jian-Guo[1];Gong, Cheng[1];Xuan, Fu-Zhen[1];Chen, Haofeng[2]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety MOE, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Lanark, Scotland

年份：2019

卷号：141

期号：5

外文期刊名：JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME

收录：;EI(收录号：20192907211786);WOS:【SCI-EXPANDED(收录号:WOS:000485710100001)】；

基金：National Science Foundation of China ((51605165, 51475167, 51828501); Funder ID: 10.13039/501100001809). National Key Research and Development Program of China ((2016YFC0801905); Funder ID: 10.13039/501100002855). 111 Project (Funder ID: 10.13039/501100002338).

语种：英文

外文关键词：notch effect; high temperature; creep; fatigue; creep-fatigue; review

摘要：Structural discontinuities (e.g., nozzle, hole, and groove) widely occur in many high temperature components of nuclear and fossil power plants. In general, the notched component is used for simplified tests and analyses due to the complexity of the introduction of a practical component. In the previous work, the effects of the notch on failure life of the components have been reported experimentally, including the strengthening and weakening effects; however, the internal mechanisms have not been clearly demonstrated. This work reviews the notch effects on the structural strength of the notched components at elevated temperatures under creep, fatigue, and creep-fatigue loading conditions. Experimental phenomena (i.e., strengthening or weakening effects) for typical notched specimens subjected to the above three loading conditions are summarized, and the related factors for notch effects on creep rupture life or cycle to failure of the components are discussed. The mechanisms for the strengthening or weakening effects induced by a notch are described. Evaluation procedures for notch effect analysis under complex loading conditions are also included, and the primary challenges concerning the notch effect are provided for further investigations.