Estimation of Crack Depth of Wire EDMed Surface of Electric Conductive Zirconia

Abstract

This paper provides an estimation method of surface crack depth induced by wire EDM based on the fracture dynamics in case of electric conductive ceramics, Zirconia. The fracture dynamics model was used for this analysis. The cracks were evaluated experimentally by two other different methods. One of them was derived from ground removal amount of the W-EDMed surfaces that can recover the fracture strength. The other was derived from the rest of the crack depth and ground amount of the surface. These estimated values were compared to clarify the surface crack depth induced by W-EDM condition. A prediction method for the surface crack depth was considered based on the experimental results.