文献类型：期刊文献

英文题名：Creep life assessment of aero-engine recuperator based on continuum damage mechanics approach

作者：Liao, Pengpeng[1];Zhang, Yucai[1,2];Zhou, Guoyan[1];Zhang, Xiancheng[1];Jiang, Wenchun[2];Tu, Shantung[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressurized Syst & Safety, MOE, Shanghai 200237, Peoples R China;[2]China Univ Petr East China, Coll Chem Engn, State Key Lab Heavy Oil Proc, Qingdao 266555, Peoples R China

年份：2022

卷号：17

期号：4

外文期刊名：FRONTIERS OF MECHANICAL ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000897628800002)】；

基金：AcknowledgementsThe work was supported by the National Natural Science Foundation of China (Grant No. 51675181). The authors are also grateful for the Innovation Program of Shanghai Municipal Education Commission, China (Grant No. 2019-01-07-00-02-E00068).

语种：英文

外文关键词：creep; life assessment; brazed joint; continuum damage mechanics; aeroengine recuperator

摘要：The creep life of an aeroengine recuperator is investigated in terms of continuum damage mechanics by using finite element simulations. The effects of the manifold wall thickness and creep properties of brazing filler metal on the operating life of the recuperator are analyzed. Results show that the crack initiates from the brazing filler metal located on the outer surface of the manifold with the wall thickness of 2 mm and propagates throughout the whole region of the brazing filler metal when the creep time reaches 34900 h. The creep life of the recuperator meets the requirement of 40000 h continuous operation when the wall thickness increases to 3.5 mm, but its total weight increases by 15%. Decreasing the minimum creep strain rate with the enhancement of the creep strength of the brazing filler metal presents an obvious effect on the creep life of the recuperator. At the same stress level, the creep rupture time of the recuperator is enhanced by 13 times if the mismatch between the minimum creep rate of the filler and base metal is reduced by 20%.