Crushing as a Mechanism of Material Removal During Abrasive Machining

A crushing model, based on an elastic stress analysis and a strain energy density criterion for initiation of mixed‐mode fracture at uniformly distributed flaws, was used to estimate the extent of crushing under a diamond point subjected to an inclined load. The boundaries of the crushed region were compared with the estimated yield boundaries and the measured depths of grooves formed in several materials under similar conditions. Good agreement between the mixed‐mode fracture boundary and the groove depth was observed when the mixedmode fracture boundary was sufficiently far removed from the yield boundary. The results indicate that when the mixed‐mode fracture boundary and the yield boundary are close together, it will be necessary to use an elastic‐plastic solution for the stress distribution to estimate the depth of the mixed‐mode fracture boundary.