文献类型：期刊文献

英文题名：A dual-scale modelling approach for creep-fatigue crack initiation life prediction of holed structure in a nickel-based superalloy

作者：Li, Kai-Shang[1];Cheng, Lv-Yi[1];Xu, Yilun[2];Wang, Run-Zi[1,4];Zhang, Yong[1];Zhang, Xian-Cheng[1,4];Tu, Shan-Tu;Miura, Hideo[3]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]Imperial Coll London, Dept Mat, London SW7 2AZ, England;[3]Tohoku Univ, Fracture & Reliabil Res Inst, Grad Sch Engn, Sendai, Miyagi 9808579, Japan;[4]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Minist Educ, Meilong Rd 130, Shanghai 200237, Peoples R China

年份：2022

卷号：154

外文期刊名：INTERNATIONAL JOURNAL OF FATIGUE

收录：;EI(收录号：20213710896523);WOS:【SCI-EXPANDED(收录号:WOS:000797603600002)】；

基金：This work was supported financially by the National Key Research and Development Program of China (2018YFC1902404) , the National Natural Science Foundation of China (Nos. 52005185 and 51725503) , China Postdoctoral Science Foundation (2020M681200) and 111 Project. Wang RZ and Miura H also gratefully acknowledge the support of the Postdoctoral Fellowships for Research in Japan (FY2020 P20350) by the Japan Society for the Promotion of Science (JSPS) .

语种：英文

外文关键词：Creep-fatigue; Holed specimen; Dual-scale modelling; Crystal plasticity; Life prediction

摘要：In this paper, a dual-scale modelling approach is developed to investigate creep-fatigue behavior and predict crack initiation life for holed structures under multi-axial stress state. The macro-scale simulation supplies local deformation histories to the dual-scale simulation as boundary conditions. In the dual-scale simulation process, the micro-mechanical behavior and damage evolution are described by using crystal plasticity. In order to validate the dual-scale simulation procedures, a series of creep-fatigue tests as well as the post-test characterizations were carried out for nickel-based Inconel 718 at 650 celcius. The detailed results of macro- and micro-scale simulations are presented in terms of stress-strain behavior, damage evolution and life prediction. Regarding the macro-scale simulations as the benchmark, it may provide an assistant support and precognition for the microscale damage calculation at higher cycles. The predicted cycle numbers to crack initiation are in agreement with the experimental ones. More advantages are manifested in the potential scientific and engineering significance for the dual-scale modelling approach.