基于有限元模拟探究超载对钢轨磨耗的影响
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摘要
随着高速铁路和重载运输的快速发展,对钢轨损伤现象尤其对钢轨表面接触磨耗的研究变得愈发重要.通过有限元软件ANSYS建立了轮轨接触的二维计算模型,施加载荷工况:改变轮重为10t—15t—10t;采用Chaboche随动强化模型,并通过剪切塑性应变累积及残余应力等力学参量来分析超载对钢轨磨耗的影响,为已有铁路线路的改造以及新线路的设计提供参考.
With the rapid development of high-speed railways and overload transportation,the study of the damage behavior of rails,especially,of the wear of rail surfaces,becomes increasingly important.In this paper,a two-dimension calculation model is established by using the finite element software ANSYS.The load conditions are applied:changing the wheel weight to 10 t-15 t-10 t.Based on the Chaboche follow-up hardening model,the effect of overload on rails wear is analyzed by the shear plastic strain accumulation and residual stress,which can provide guidance for the transformation of existing railway lines and the design of new lines.
With the rapid development of high-speed railways and overload transportation,the study of the damage behavior of rails,especially,of the wear of rail surfaces,becomes increasingly important.In this paper,a two-dimension calculation model is established by using the finite element software ANSYS.The load conditions are applied:changing the wheel weight to 10 t-15 t-10 t.Based on the Chaboche follow-up hardening model,the effect of overload on rails wear is analyzed by the shear plastic strain accumulation and residual stress,which can provide guidance for the transformation of existing railway lines and the design of new lines.
引文
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[2]金学松,刘启跃.轮轨摩擦学[M].北京:中国铁道出版社,2004.
[3]沈志云.关于高速铁路及高速列车的研究[J].振动,测试与诊断,1998,18(1):1-7.
[4]金学松,张继业,温泽峰,等.轮轨滚动接触疲劳现象分析[J].机械强度,2002,24(2):250-257.
[5]Pandkar A S,Arakere N,Subhash G.Microstructure sensitive accumulation of plastic strain due to ratcheting in bearing steels subject to rolling contact fatigue[J].Int J Fat,2014,63(6):191-202.
[6]江晓禹,李孝滔,李煦,等.轮轨高速滚动接触及钢轨疲劳裂纹扩展研究[J].西南交通大学学报,2016,51(2):274-281.
[7]吴志荣,胡绪腾,辛朋朋.基于Chaboche模型的金属材料稳态循环应力—应变曲线的本构建模方法[J].机械工程材料,2013,37(10):92-95.
[8]Bandula-Heva T,Dhanasekar M.Failure of discontinuous railhead edges due to plastic strain accumulation[J].Eng Fail Anal,2014,44:110-124.
[9]Kapoor A,Franklin F J.Tribological layers and the wear of ductile materials[J].Wear,2000,245(1/2):204-215.
[10]Tyfour W R,Beynon J H,Kapoor A.The steady state wear behaviour of pearlitic rail steel under dry rolling-sliding contact conditions[J].Wear,1995,180(1/2):79-89.