STUDY OF LUBRICATION PREDICTION MODEL OF THE LOW-ELASTIC PORO-MATERIALS CONTAINED FLUIDS AND ITS APPLICATIONS

摘要

A new lubrication predicted model of the poro-elasticbiomimetic materials with low Young's modulus and permeability has been developed based on Darcy's law, coupled with a linear elastic solid model, contact mechanics for the solid contact, and Reynolds' equation.In the research, a sliding bearing rotating against a flat surface is used as a typical example to analyze the effect of material parameters and operating conditions. The results show that the material parameters (permeability k, Young's modulus E, and viscosity μ) and operating conditions (angular velocity ω and contact deformation δ) have significant effects on the lubrication performance of the poro-elastic biomimetic materials. It is also observed that the load ratio (the ratio of pressure borne load to the applied load along the contact boundary) increases as k and E decrease, and as μ, ω, and δ increase. Conversely, maximum solid stress decreases with decreasing of E, μ, ω, δ and with increasing of k. As an application, the relationship among the load ratio, contact stress, and deformation relative to E and k on a bearing design has been illustrated in the paper.