文献类型：期刊文献

英文题名：Viscoplastic constitutive modelling of the ratchetting behavior of 35CrMo steel under cyclic uniaxial tensile loading with a wide range of stress amplitude

作者：Zheng, Xiaotao[1];Wang, Wei[1];Guo, Sujuan[2];Xuan, Fuzhen[2]

机构：[1]Wuhan Inst Technol, Sch Mech & Elect Engn, Hubei Prov Key Lab Chem Equipment Intensificat &, Wuhan 430205, Hubei, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech Engn, Key Lab Pressure Syst & Safety, MOE, 130 Meilong St POB 402, Shanghai 200237, Peoples R China

年份：2019

卷号：76

起止页码：312

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

收录：;EI(收录号：20192006929627);WOS:【SCI-EXPANDED(收录号:WOS:000472691600026)】；

基金：This work was financially supported by the National Natural Science Foundation of China (51835003, 51305310).

语种：英文

外文关键词：35CrMo; Stress amplitude; Rate-dependent; Viscoplasticity; Ratchetting constitutive model

摘要：The rate-dependent ratchetting characteristics of 35CrMo alloy under repeated uniaxial tension considering different stress amplitudes were studied at 500 degrees C. It is found that the applied stress rate and stress amplitude influence the accumulated plastic deformation greatly. The existing visco-plastic ratchetting constitutive model can well predict those features considering the effect of stress rate, but not so well when the stress amplitude effect is involved, especially for the cases of relatively low stress amplitude. Accordingly, a modified rate-dependent ratchetting constitutive model has been developed, which can well predict the ratchetting deformations in a wide range of stress amplitude and stress rate. Furthermore, the modified rate-dependent ratchetting constitutive model can be used to assess the ratchet boundary of the alloy with relatively high accuracy.