轮轨接触磨损与裂纹产生机制的有限元模拟  

The Wheel Rail Contact Wear Mechanism and Finite Element Simulation of Crack

作　　者：李国斌[1] 邝卫华[1] 

机构地区：[1]广州番禺职业技术学院机电工程学院,广东广州511483

出　　处：《湖南有色金属》2017年第3期56-60,共5页Hunan Nonferrous Metals

基　　金：广州市教育科学规划课题(1201532993)

摘　　要：为探究轮轨接触磨损与裂纹产生的机制,利用滚动、滑动轮轨接触对变形表面进行金相研究。其次,提出一种可以模拟滚动、滑动接触表面附近的变形过程的多尺度有限元模型。此外,现实中滚动滑动轮沿轨道的蠕滑行为是被广泛认可的。关于这些轮轨接触的实际形变量的从微米到毫米范围内的塑性剪应力可以预测。使用多尺度模型得到的数值结果可以比较金相观察,结果与实际相符合,具有一定的现实指导意义。In order to investigate the mechanism of wheel rail contact wear and crack formation, the rolling and sliding wheel rail contact. Secondly, a multi - scale finite element model is proposed to simulate the deformation process of rolling and sliding contact surfaces. In addition, it is widely accepted that the creep behavior of the rolling wheel along the track. The plastic shear stresses of the actual shape variables of the wheel rail contact can be predicted from micron to millimeter. The numerical results obtained by the multi -scale model can be compared with the metallographic observation, and the results are consistent with the actual situation, which has a certain practical guidance significance.

关 键 词：轮轨磨损 裂纹 金相观察 有限元模拟 

分 类 号：TG113.22[金属学及工艺—物理冶金]