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Volume 55 Issue 6
Dec.  2020
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Article Contents
Journal of Southwest Jiaotong University  > 2020  >  55(6): 1337-1347.
ZHAO Jizhong, XU Xiang, DING Li, KAN Qianhua, KANG Guozheng. Finite Element Analysis of Rolling Strengthening Process for Wheel Tread of High-Speed Trains[J]. Journal of Southwest Jiaotong University, 2020, 55(6): 1337-1347. doi: 10.3969/j.issn.0258-2724.20180803
Citation: ZHAO Jizhong, XU Xiang, DING Li, KAN Qianhua, KANG Guozheng. Finite Element Analysis of Rolling Strengthening Process for Wheel Tread of High-Speed Trains[J]. Journal of Southwest Jiaotong University, 2020, 55(6): 1337-1347. doi: 10.3969/j.issn.0258-2724.20180803
shu

Finite Element Analysis of Rolling Strengthening Process for Wheel Tread of High-Speed Trains

doi: 10.3969/j.issn.0258-2724.20180803
  • Received Date: 19 Sep 2018
  • Rev Recd Date: 18 Dec 2018
    • Available Online: 17 Feb 2020
  • Publish Date: 15 Dec 2020
    Abstract
  • To improve the wheel tread strength and service life of high-speed trains after reprofiling, the numerical simulation of rolling strengthening for the wheel tread was carried out, and the process parameters of rolling strengthening were optimized. Focusing on the wheel of the CRH3 high-speed train, a three-dimensional rolling contact finite element model was established which combines the roller, wheel, and rail. According to the influences of roller size, rolling pressure and rolling time on the distributions of residual stress and equivalent plastic strain fields of the wheel tread, the rolling strengthening mechanism were numerically investigated. The fatigue crack initiation life of the wheel tread after rolling strengthening in wheel-rail contact were estimated by the Manson-Coffin model modified by Borrow-Miller criterion, and the process parameters of rolling strengthening were optimized. The results show that, with the increase of rolling force, the fatigue crack initiation life of the wheel tread increases at first and then decreases, and it decreases with the increasing rolling time, which implies that the increasing rolling time reduces the fatigue crack initiation life of the wheel tread. Meanwhile, increasing the rolling time has little effect on the residual stress, and the increasing roller radius leads to a small increase of the fatigue crack initiation life. In summary, the optimal rolling strengthening parameters can be considered as the rolling times of 3 times, rolling force of 1 kN and roller radius of 6 mm, which can increase the fatigue crack initiation life of the wheel tread by about 58%.

     

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