Abstract:
The objective of this research is to simulate the chip formation and cutting force during the
orthogonal cutting of Gallium Nitride (GaN) by conventional diamond tool. Numerical simulations
were conducted to find out the Von-Mises stress, cutting force, energy balance and how these
output parameters change during the machining process. The mechanical properties of GaN and
Diamond, such as density, young's modulus, shear modulus, cohesion value, angle of friction, and
dilation angle were taken from literature. Before conducting the numerical simulations for the
machining of GaN, Steel (AISI 1045) was numerically machined, and its plastic flow stresses were
matched with the published results. For Steel, Johnson-Cook material model and failure criteria
were used inside ANSYS/LS-DYNA module with a rigid diamond tool. For the simulation about
GaN, Mohr-Coulomb material model with Smooth Particle Hydrodynamics (SPH) approach was
used. These explicit numerical simulations have been performed using ANSYS/LS-DYNA. The
numerical predictions of Von-Mises stresses were found to be consistent with the literature
