An Investigation into the Effect of Three-flow Stress Models on the Finite Element Simulation of Orthogonal Cutting of AISI 1045 Steel

摘要

This work evaluates the effects of three different flow stress models on the finite element simulation of the orthogonal cutting process on AISI 1045 steel. The flow stress models, namely, Oxley, Johnson-Cook (J-C) and Modified Johnson-Cook (MJ-C), were used as the constitutive material behavioural models for the finite element simulation. Orthogonal cutting tests on a tube of AISI 1045 steel material was carried out with a coated tungsten carbide tool for a constant cutting speed of 102 m/min and different feed rates of 0.102 mm/ rev, 0.143 mm/rev and 0.159 mm/rev. The predicted finite element (FE) results for cutting force and shear strain were compared against the experimental values. The stress and strain rate distribution with the three-flow stress models were analysed. The FE results with Modified J-C model showed a marked closeness to the experimental values with a minimum deviation of 1%to 11%, when compared with the Oxley and J-C models.