Analysis of Coefficient of Friction in Compression of Porous Metal Rings

Abstract

The elastoplastic finite element method using a yield criterion advanced by Lee and Kim was employed to analyse the compression of sintered porous metal rings. Densities of the porous rings and compression loads have been calculated as a function of height reduction. The changes in geometry of porous metal rings with initial relative density were also calculated for various coefficients of friction between the metal rings and compression platens. The coefficient of friction could be determined from the relationship between the change in the inner diameter and height reduction of porous metal rings with various initial relative densities. From the changes in the average relative densities of the porous metal rings, evaluation of lubricants could be also conducted. PM/0638