Inverse Identification of the Constitutive Equation of Inconel 718 and AISI 1045 from FE Machining Simulations

A mechanics-based predictive model for chip breaking in metal machining and its validation

“…The materials' plastic behaviors were assumed as visco-plastic, and described by the Johnson-Cook constitutive equation [14]. The plastic material constants were calibrated by following the previous approach [22]. The tool geometries were provided as CAD files from the manufacturer, and assumed to be rigid.…”

3D FEM simulation of chip breakage in metal cutting

“…In this work, the material constants are adopted from Klocke et al for normalized steel AISI 1045 (C45E+N), which are given in Table 4 [43].…”

“…Material constants of the Johnson-Cook plasticity model for AISI 1045 from Klocke et al[43] camera and numerically by the FE simulation. As shown, the model is able to distinguish between those cutting parameter combinations under which chip breakage occurs and those under which the chips do not break.…”

Heat Flux in Cutting: Importance, Simulation and Validation

“…The thermoplastic flow was modeled according to the Johnson-Cook law, in which the coefficients were found by means of comprehensive parameter identification in [16] from experiments and FE modeling (see Table 3). The serration of Inconel 718 chip formation is most closely approximated by the Cockcroft-Latham damage criterion with the parameter D crit =97.8.…”

“…Chip serration was also observed in the experiments but not in such degree like seen in the Figures 5 and 6. The reason may be that the serration process is incompletely reflected by the used materials law with fitted Cockroft-Latham parameters [16].…”