VALIDATION OF THE EROSION MAP FOR SPHERICAL-PARTICLE IMPACTS ON GLASS

Hard spherical particles may exhibit a variation in impact damage on a softer target depending on the particle diameter and particle velocit y. In this paper quantitative equations will be derived for these tran sitions in material behaviour. These equations have been presented in an erosion map of particle size against impact velocity. The equations used for the erasion map presented here resembles the mathematical re lationships presented by others. The difference with earlier reports i s that in this paper not only proportionalities are given but also the prefactors are determined. The theoretically derived erosion map has been validated for spherical particle impacts on borosilicate glass. T he results show that the theoretical derived erosion map is generally correct. Most remarkable is the existence of cone cracks in the plasti c regime. (C) 1998 Elsevier Science S.A.