轴承钢硬切削表面残余应力对滚动接触界面疲劳寿命的影响

为了预测轴承钢硬切削表面残余应力对滚动接触寿命的影响规律，基于高级非线性有限元分析软件MARC，建立了具有平面应变特征的二维滚动接触寿命预测模型，并在二维有限元模型的表面和次表面对应施加了轴承钢硬切削实验所测残余应力，模拟计算典型服役条件下的滚动接触应力；采用基于S N寿命理论的Miner法则，计算轴承钢滚动界面的疲劳接触寿命，分析了在不同摩擦系数、滚动接触频率和外加载荷工况下，硬切削残余压应力对疲劳寿命的影响.结果表明，硬切削残余压应力可使轴承钢的滚动接触疲劳寿命提高10％~30％.其中，载荷对滚动接触疲劳寿命影响最大，摩擦系数的影响最小.

Rolling Contact Fatigue Life Prediction on Bearing Steel Pre-residual Stress Surfaces Induced by Hard Turning

To predict the effect of the hard turning-induced residual stress on the rolling fatigue life of bearing steel,2D rolling contact fatigue life model characteristic with plane strain was developed based on MARC.The residual stress on the machined surface and subsurface from the hard turning bearing steel was applied to surface and subsurface of 2D model correspondingly.The rolling contact stress distribution was simulated under the typical services,and the rolling fatigue life of contact interface was predic...