首页|A cyclic visco-plastic constitutive model for the ratcheting behavior of U75VG rail steel under a wide range of loading rates
A cyclic visco-plastic constitutive model for the ratcheting behavior of U75VG rail steel under a wide range of loading rates
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NSTL
Elsevier
? 2022 Elsevier LtdThe uniaxial tension, strain-controlled and stress-controlled cyclic deformation experiments of U75VG rail steel at various loading rates were carried out. Experimental results show that the U75VG rail steel shows obvious rate-dependent tension, cyclic softening feature and ratcheting behavior. Moreover, based on the rate-dependent experimental results, a new cyclic visco-plastic constitutive model was established by introducing the rate-dependent isotopic resistance and ratcheting factor into isotropic and kinematic hardening rules, respectively. Compared with the classic cyclic visco-plastic model, the proposed model can reasonably simulate the tension, strain-controlled and stress-controlled cyclic deformation behaviors at different loading rates. Finally, the prediction capacity of ratcheting behavior under a wide range of loading rates was demonstrated.
Cyclic deformationStrain-rate dependenceU75VG rail steelVisco-plastic model
Zhang X.、Kan Q.、Wang P.、Zhao J.、Fu P.、Xu X.
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Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Aerospace Engineering Southwest Jiaotong University
Key Laboratory of High-speed Railway Engineering Ministry of Education Southwest Jiaotong University
NSTL
Elsevier
