Simulation research on macroscopic bond breakage on the rake face of cemented carbide inserts

The bond breakage on the rake face of cemented carbide inserts has a significant impact on the life of the insert. The problem of cemented carbide insert bonding damage is analyzed, and the main failure mode of cemented carbide insert is brittle fracture. Based on the extended finite element method (XFEM) and cohesive technology, and according to the stress state of cemented carbide insert in different cutting states and the position of adhesion layer, the actual boundary conditions are set in ABAQUS simulation environment. The three-dimensional macroscopic simulation model with crack structure and load-bearing capacity that meets the actual working conditions is established, and the influence of no cracks, single cracks at different angles, multiple cracks, and load on the peeling of the adhesion layer are analyzed. Regardless of whether it is in the state of no pre-crack or multiple cracks, the rake face is damaged when the adhesive layer is subjected to a shear load parallel to the rake face, which is similar to the experimental results. while in the single crack state, the position, angle and load direction of the crack do not show excessive sensitivity to the peeling of the adhesion layer, which provided a theoretical basis for revealing the essential reason for the bond failure effect of cemented carbide inserts.