Indentation events during surface machining - Compilation of local stress intensity factors

During surface machining of glass, machining-induced surface cracks are introduced. The result of a contact between a grain of the grinding wheel and the glass surface can be described by a cracklike damage similar to the cracks obtained by hardness indentation tests. In the present report, we study the generation of such cracks and their interaction with residual stresses in the surface region. For three different loadings (pure tension, indentation, surface stresses) we report the relevant stress intensity factors.