EHL modeling of nonhomogeneous materials: The effects of polycrystalline anisotropy on RCF

摘要: Abstract Bearing steel is comprised of a polycrystalline aggregate anisotropic crystals which affects the stress distribution and subsurface fatigue crack formation. In present investigation an approach proposed to determine contact pressure, film thickness stresses in material operating under elastohydrodynamic lubrication (EHL). The based on fully coupled finite element EHL model uses 1D elements solve Reynolds equation 2D resolve deformations for line problem. simulated using Voronoi polygon discretization with each receiving unique crystallographic orientation. definition used this has cubic crystal structure. Results from FE show that pressures vary due orientation concentrations occur at grain boundaries. profiles were not significantly affected by addition anisotropy effects microstructural model. However, relative life prediction obtained showed significant scatter generated into results much closer agreement experimental than models assume isotropic models.