Three formulas are derived for predicting the central and the minimum film thickness as well as the asperity load ratio in line-contact EHL with provision for surface roughness. These expressions are based on the simultaneous solution to the modified Reynolds equation and surface deformation with consideration of elastic, plastic and elasto-plastic deformation of the surface asperities. The formulas cover a wide range of input and they are of the form f(W, U, G, , V), where the parameters represented are dimensionless load, speed, material, surface roughness and hardness, respectively.
Film Thickness and Asperity Load Formulas for Line-Contact Elastohydrodynamic Lubrication With Provision for Surface Roughness
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Masjedi, M., and Khonsari, M. M. (February 24, 2012). "Film Thickness and Asperity Load Formulas for Line-Contact Elastohydrodynamic Lubrication With Provision for Surface Roughness." ASME. J. Tribol. January 2012; 134(1): 011503. https://doi.org/10.1115/1.4005514
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