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在弹流润滑理论中,用于高弹性模量材料(如金属)副的Dowson膜厚公式和用于低模量(如橡胶)副Herrebrugh膜厚公式已经得到试验和工程实际的证实,获得普遍的认可.但中等弹性模量(如钢——高分子复合材料)副是否可采用这些公式进行膜厚计算,值得探讨.高模量和低模量的膜厚计算的根本区别在于压粘效应和弹性效应的影响程度不同.Dowson膜厚公式所涉及的材料综合弹性模量E′在10~5MPa数量级,其无量钢材料参数G=2500-5000左右,压粘效应异常显著;Herrebrugh膜厚公式所涉及的材料综合弹性模量E’在10MPa数量级,接触区压力
In the Elastohydrodynamic theory, the Dowson film thickness formula for the pair of high elastic modulus materials (eg, metal) and the Herrebrock film thickness formula for low modulus (eg rubber) have been experimentally and engineering proven to be generally accepted However, it is worth discussing whether the medium elastic modulus (such as steel-polymer composite) can calculate the film thickness by these formulas.It is worth noting that the fundamental difference between the film thickness calculation of high modulus and low modulus is that the pressure-tack effect And elastic effect.Dowson film thickness formula involved in the material of the elastic modulus E ’in the order of 10 ~ 5MPa, the immeasurable steel material parameters G = 2500-5000 or so, the pressure-tack effect was abnormal significantly; Herrebrugh film thickness formula The material involved in the overall elastic modulus E ’in the order of 10MPa, contact zone pressure