NUMERICAL SOLUTION FOR CONTACT PRESSURE AND WEAR DISTRIBUTIONS OF UNLUBRICATED, MISALIGNED, CLOSELY CONFORMING, MULTIPLY CONNECTED SURFACES.

摘要

A general numerical method is presented for studying unlubricated arbitrary profile, elastic body contact problems with combined normal and shear loadings. A pressure wear theory is introduced to solve for instantaneous pressure distributions and the corresponding worn surface profiles as sliding contact continues. The modified Boussinesq point force displacement influence function and modified profile function are employed in conjunction with an integral equation discretization method and an automatic mesh generation technique to redefine the new pressure area boundary. A wide range of contact problems involving multiply-connected regions can be solved. The general numerical method has been implemented in several computer programs and has been applied to the problems of misaligned and perfectly-aligned conformal contact. The results have been verified by comparison with the experimental data presented in the literature for the self-lubricated journal bearing under various conditions of load and misalignment. The agreement between the theory and experimental work is good within the framework of linear theory of elasticity. The effect of clearance and material properties on conformal contact pressure distribution are also examined and compared with analytical solutions.