Elastic-Plastic Finite Element Analysis of Nonsteady State Partial Slip Wheel-Rail Rolling Contact
Elastic-Plastic Finite Element Analysis of Nonsteady State Partial Slip Wheel-Rail Rolling Contact
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DOI：
10.1115/1.2033898
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发表时间：
2005-10
影响因子：
2.5
通讯作者：
Z. Wen;Xue-song Jin;Yanyao Jiang
中科院分区：
文献类型：
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作者：
Z. Wen;Xue-song Jin;Yanyao Jiang
采用先进的循环塑性理论对轮轨非稳态滚动接触下的弹塑性变形进行了有限元分析。非稳态滚动接触的考虑仅限于轮轨法向接触力的谐波变化。将法向接触压力理想化为赫兹分布，并采用卡特提出的切向力。详细的滚动接触应力和应变，获得了重复滚动接触。法向（垂直）接触力的谐波变化导致波状滚动接触表面轮廓。研究结果有助于理解塑性变形对钢轨裂纹萌生和扩展的影响。蠕变或粘滑状态对残余应力和应变有很大影响。而残余应变和表面位移增加的速度随着轧制道次的增加而降低，残余应力在有限数量的轧制道次后趋于稳定。残余应力和应变在残余变形的波谷处比波峰处高。
A finite element analysis with the implementation of an advanced cyclic plasticity theory was conducted to study the elastic-plastic deformation under the nonsteady state rolling contact between a wheel and a rail. The consideration of nonsteady state rolling contact was restricted to a harmonic variation of the wheel-rail normal contact force. The normal contact pressure was idealized as the Hertzian distribution, and the tangential force presented by Carter was used. Detailed rolling contact stresses and strains were obtained for repeated rolling contact. The harmonic variation of the normal (vertical) contact force results in a wavy rolling contact surface profile. The results can help understand the influence of plastic deformation on the rail corrugation initiation and growth. The creepage or stick-slip condition greatly influences the residual stresses and strains. While the residual strains and surface displacements increased at a reduced rate with increasing rolling passes, the residual stresses stabilize after a limited number of rolling passes. The residual stresses and strains near the wave trough of the residual wavy deformation are higher than those near the wave crest.