| ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS OF THREE-DIMENSIONAL CONTACT-IMPACT AT RAIL JOINT |
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| 作者姓名： | Wen Zefeng
Jin Xuesong
Zhang Weihua
National Traction Power Laboratory Southwest Jiaotong University Chengdu China |
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| 作者单位： | Wen Zefeng
Jin Xuesong
Zhang Weihua
National Traction Power Laboratory，Southwest Jiaotong University，Chengdu 610031，China |
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| 基金项目： | National Natural Science Foundation of China(No.599355100)，Foundation for Excellent PhD Thesis of University of Ministry of Education of China (No.200048) |
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| 摘 要： | Using the finite element code ANSYS/LS-DYNA, a dynamic finite element model with anelastic-linear-kinematic-hardening plastic material is established to analyze elastic-plastic stresses inthe railhead in the impact process of wheel and rail occurring at the gap of rail joint. The model isbased on the discrete elastic support condition of the rails, which is suitable for the actual situation ofwheel/track rolling contact. In the analysis the influences of axle load, yield stress and tangent modulus
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| 关 键 词： | 铁路 车轮／钢轨 钢轨接头 弹塑性 接触冲击 有限元方法 |
ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS OF THREE-DIMENSIONAL CONTACT-IMPACT AT RAIL JOINT |
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| Wen Zefeng
Jin Xuesong
Zhang Weihua
National Traction Power Laboratory,Southwest Jiaotong University,Chengdu ,China.ELASTIC-PLASTIC FINITE ELEMENT ANALYSIS OF THREE-DIMENSIONAL CONTACT-IMPACT AT RAIL JOINT[J].Chinese Journal of Mechanical Engineering,2003,16(4):411-416. |
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| Authors: | WenZefeng JinXuesong ZhangWeihua |
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| Affiliation: | NationalTractionPowerLaboratory,SouthwestJiaotongUniversity,Chengdu610031,China |
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| Abstract: | Using the finite element code ANSYS/LS-DYNA, a dynamic finite element model with an elastic-linear-kinematic-hardening plastic material is established to analyze elastic-plastic stresses in the railhead in the impact process of wheel and rail occurring at the gap of rail joint. The model is based on the discrete elastic support condition of the rails, which is suitable for the actual situation of wheel/track rolling contact. In the analysis the influences of axle load, yield stress and tangent modulus of rail material on the stresses and strains are investigated in detail. The distribution of stresses and strains in the jointed railhead are given. It is found that the axle load, yield stress and tangent modulus of rail material greatly affect the stresses and strains in the railhead during impacting. The study provides a reliable method and useful datum for the further research on fatigue and wear of railhead and improving the rail joint mode. |
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| Keywords: | Wheel/rail Rail joint Elastic-plastic Contact-impact Finite element method |
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