Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC

Machining of brittle ceramics is a challenging task because the requirements on cutting tools are extremely high and quality machined surface strongly depends chosen process parameters. Typically, efficiency machining increases with depth cut or feed rate tool. However, for ceramics, this easily results in very rough surfaces even crack formation. The transition from smooth obtained small depths to larger called brittle-to-ductile machining. In work, we investigate mechanisms diamond an intrinsically 3C-SiC ceramic finite element modeling. Drucker–Prager model has been used describe plastic deformation material parameters have determined by inverse method match behavior under nanoindentation, which similar loading state as one occurring during cutting. Furthermore, damage introduced separation also initiation subsurface regions. With model, grooving simulations tool performed analyzed. Our reveal distinct between ductile modes function cut. critical found be independent rake angle; however, roughness angle