A NUMERICAL INVESTIGATION OF THE CHIP TOOL INTERFACE IN ORTHOGONAL MACHINING.

A plane-strain thermo-elasto-viscoplastic finite element model has been developed and used to simulate orthogonal machining of 304L stainless steel using a ceramic tool. Simulations were carried out employing temperature-dependent physical properties. The model is used to investigate the effect of process parameters, tool geometry and edge preparation on the contact mechanics at the chip/tool interface. Stress and strain within the chip and the elastic tool are presented. Variables at the chip/tool interface such as contact length, sticking and sliding regions, normal and shear stresses, and frictional heat are investigated. Plastic deformation beneath the machined surface is compared for sharp and chamfered tools. [ABSTRACT FROM AUTHOR]