CONTACT PRESSURE OF INDENTED WIDE ELLIPTICAL CONTACTS: DRY AND LUBRICATED ANALYSIS

摘要

Indents in roller bearings perturb the pressure and stress distribution and increase the failure risk. A numerical study of the pressure perturbation is proposed. An existing dry contact model is extended to account for the indent shoulder influence and the pressure collapse in deeper indents. Moreover, results on pure-rolling lubricated contacts are presented. Finally, the ellipticity influence is studied both for dry and lubricated contacts. D: dimensionless indent depth; D_d, D_i: deformed and initial dimensionless; indent depth; H: dimensionless gap height; H_0: dimensionless mutual approach; K: dimensionless decay coefficient; P: dimensionless pressure; P_(REF): dimensionless reference pressure; R_x,R_y: reduced radii of curvature; T: dimensionless time; X,Y: dimensionless coordinates; ΔP: dimensionless additional pressure; η: dimensionless viscosity; Φ: dimensionless indent diameter; λ: dimensionless parameter of; Reynolds equation; ρ: dimensionless density