文献类型：期刊文献

英文题名：Coupling of phase field and viscoplasticity for modelling cyclic softening and crack growth under fatigue

作者：Song, J.[1,2];Zhao, L. G.[2];Qi, H.[1];Li, S.[1];Shi, D.[1];Huang, J.[1,3];Su, Y.[2,4];Zhang, K.[2,5]

机构：[1]Beihang Univ, Sch Energy & Power Engn, Beijing 100191, Peoples R China;[2]Loughborough Univ, Wolfson Sch Mech Elect & Mfg Engn, Epinal Way, Loughborough LE11 3TU, Leics, England;[3]Cent South Univ, Sch Aeronaut & Astronaut, Changsha 410083, Hunan, Peoples R China;[4]Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710129, Shaanxi, Peoples R China;[5]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：92

外文期刊名：EUROPEAN JOURNAL OF MECHANICS A-SOLIDS

收录：;EI(收录号：20214711200904);WOS:【SCI-EXPANDED(收录号:WOS:000740230200001)】；

基金：Jianan Song would like to acknowledge the support from the China Scholarship Council (CSC, No. 201906020038) and the Academic Excellence Foundation of BUAA for Ph.D. Students. The work was also funded by the EPSRC (Grant EP/M000966/1 and EP/K026844/1) of theUK and in collaboration with GE Power, Rolls-Royce and dstl.

语种：英文

外文关键词：Phase field; Cyclic viscoplasticity; Cyclic softening; Fatigue crack propagation; Stress state factor

摘要：A coupled phase field-viscoplasticity approach was developed to model the deformation and crack growth in a nickel-based superalloy under fatigue. The coupled model has an advantage in predicting the cyclic softening behavior of the alloy caused by fatigue damage, overcoming a major limitation of the original cyclic viscoplasticity model. The coupled approach is also highly effective in predicting fatigue crack propagation under varied dwell times at peak load, an important behavior for crack growth under dwell fatigue. By incorporating the stress state factor, the coupled model is further utilized to investigate the growth behavior of 3D cracks under fatigue. Both the geometrical feature of the 3D crack front and the overall crack growth rate are well captured, confirming the predicative capability of the coupled model.