Prediction of Cutting Force by Type of Constitutive Equation Used in Cutting Simulation

The constitutive equation shows the difference in the predicted result value related to cutting according to the coefficient value and type. Therefore, in this study, the cutting force and chip shape obtained from the cutting test for each cutting condition were applied as standards. And the simulation results applying the constitutive equation were compared. The constitutive equations used in this study are the Power-Law, Johnson-Cook, and S-K constitutive equations. Since the Power-Law constitutive equation is basically applied to the cutting simulation, it was used as the internal material property, and the Johnson-Cook constitutive equation and the S-K constitutive equation determined the coefficient value and performed simulation as a user property. As a result, it was confirmed that the tangential force and chip shape prediction in the cutting force and chip shape prediction of AAl7075 material were valid through simulation using the S-K constitutive equation.