Indentation of a Porous Material with Pyramids : Indentation Hardness of a Porous Material : 3rd Report

An analysis of indentation of a porous material with square-based pyramids is made. The analysis is based on an approximate energy method using a velocity field which is constructed with the slip line field for the wedge indentation of the porous material. The hardness, that is, the indentation pressure is expressed as a function of the yield stress and the relative density of the porous material. Experiments on the indentation with square-based pyramids are also carried out using workhardened and annealed specimens of sintered copper powder. The experimental results are compared with the theoretical results.