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利用建立的钢轨三维弹塑性滚动接触有限元模型,分析车辆通过曲线轨道时轮轨接触表面切向力对钢轨滚动接触应力和应变的影响。结果表明:钢轨材料的累积塑性变形、残余应力和残余应变都随切向力的增大而增大;纵向切向力与法向力之比大于0.3时其对塑性变形、残余应力和残余应变影响明显,钢轨的最大残余应力、最大等效塑性应变和剪应变均发生在钢轨接触表面,裂纹易萌生于接触表面,与现场观察结果相一致。
The established three-dimensional elastic-plastic rolling contact finite element model of the rail was used to analyze the influence of the tangential force on the rolling contact stress and strain of the rail when the vehicle passes the curved track. The results show that the cumulative plastic deformation, residual stress and residual strain of the rail material increase with the increase of the tangential force. When the ratio of the longitudinal tangential force to the normal force is greater than 0.3, the plastic deformation, residual stress and residual strain The obvious influence is that the maximum residual stress, the maximum equivalent plastic strain and the shear strain of the rail all occur on the contact surface of the rail, and the cracks are easy to occur on the contact surface, which is consistent with the observed results in the field.