弹性材料表面织构对摩擦副润滑性能的影响

为了研究弹性材料表面微织构对摩擦副空化现象和润滑特性的影响，建立考虑空化效应的二维弹性织构计算模型，采用流固耦合方法计算润滑流场与材料变形之间的相互作用。对比刚性材料表面微织构，从弹性模量、滑动速度、微织构深度以及织构间距等方面分析弹性材料表面织构对摩擦副润滑性能的影响，通过实验验证模拟结果的准确性。结果表明：弹性织构摩擦副比刚性织构摩擦副摩擦因数更小，润滑性能更好；存在最优织构深度，使得弹性织构摩擦副的摩擦力最小且承载力最大；适当增大滑动速度以及织构间距可以提高弹性摩擦副的润滑性能；随着弹性模量的降低，弹性变形和油膜厚度增加，空化现象更为显著，摩擦副的润滑性能得到提升。

Effect of Elastic Material with Surface Texture on Lubrication Performance of Friction Pair

In order to study the effect of the elastic material with surface micro-textures on the cavitation phenomenon and lubrication characteristics of friction pair,an elastic texture 2D calculation model considering cavitation effect was established,and the fluid-solid coupling method was used to calculate the interaction between the lubrication flow field and material deformation.Compared with the rigid material with textures,the influence of elastic material with textures on the lubrication performance of the friction pair was analyzed in terms of elastic modulus,sliding velocity,texture depth and texture spacing.The accuracy of the simulation results was verified by experiments.The results show that elastic texture friction pairs have smaller friction coefficient and better lubrication performance than rigid texture friction pairs.There is an optimal texture depth,which makes the friction force of the elastic texture friction pair minimum and the bearing capacity maximum.The increase of sliding speed and texture spacing can improve the lubrication performance of elastic friction pair.With the decrease of the material elastic modulus,the elastic deformation and the oil film thickness increase,cavitation phenomenon becomes more significant,and the lubrication performance of the friction pair is improved.