文献类型：期刊文献

英文题名：Modelling of creep and plasticity deformation considering creep damage and kinematic hardening

作者：Meng, Li[1];Chen, Wufan[1,3];Yan, Yabin[2,3];Kitamura, Takayuki[3];Feng, Miaolin[1]

机构：[1]Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Sch Naval Architecture Ocean & Civil Engn, Shanghai 200240, Peoples R China;[2]East China Univ Sci & Technol, Minist Educ, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[3]Kyoto Univ, Dept Mech Engn & Sci, Nishikyo Ku, Kyoto 6158540, Japan

年份：2019

卷号：218

外文期刊名：ENGINEERING FRACTURE MECHANICS

收录：;EI(收录号：20193207271901);WOS:【SCI-EXPANDED(收录号:WOS:000483383200019)】；

基金：The authors would like to deeply appreciate the support from the National Natural Sciences Foundation of China (11572191, 51779139, and 51701117) and Shanghai Science and Technology Committee Foundation (17411962200).

语种：英文

外文关键词：Creep; Damage; Creep rupture time; Creep rupture strain; Kinematic hardening; Rate-sensitivity; Viscoplasticity

摘要：This study addresses creep behavior under constant load with the evolution of damage and plastic deformation by load change. A creep strain rate equation with one damage variable is adopted. Two kinematic hardening models related to time-independent plasticity and viscoplasticity, respectively, are incorporated. Combining the creep equation and kinematic hardening theory, two models are proposed: a creep-plasticity model and a nonunified viscoplasticity model. Experiment data for Al 5083 and AISI type 316H are used to verify the utility of the proposed models. Due to the creep part with damage, both models precisely predict the creep strain curve and the rupture time and strain. However, the creep-plasticity model fails to describe the first-stage creep and strain rate sensitivity in monotonic tensile testing that can be captured with the nonunified viscoplasticity model. Finally, the parameter determination is discussed.