The effect of interstitial fluid on the machining behaviour of cortical bone

On modelling coolant penetration into the microchannels at the tool-workpiece interface

“…On the microscale, the coolant works by penetrating the microchannels with specific initial properties that dramatically change the friction coefficient, heat generation rate and thermal conductivity of the interface. For example, in porous and permeable materials, localised fluid delivery can drastically reduce the friction coefficient in the toolchip interface [20] and therefore induce a gradient of micromechanical properties beneath the machined surface [21]. Nevertheless, the study of fluid delivery upon the cutting zone (at a microscopic level) is a great challenge, since, as defined by Astakhov [22], the high contact pressure between the cutting tool and the workpiece make the fluid through capillaries an intricate problem in which also evaporation is easily enabled.…”