The Intensification of the Resistance to Deformation at High-Rate Strain and Anomalous Thermal Hardening of Aluminum in the Cutting

摘要

Based on the analysis of experimental data on plastic shock waves in aluminum AD1 a viscoelastoplastic material model was constructed. The model describes the intensification of the resistance to deformation at high-rate strain and anomalous hardening with temperature rise. In frame of the finite element method the two-dimensional problem on cutting the viscoelastoplastic workpiece by absolutely rigid cutter was considered. The comparative calculations were performed for different developed models of the material including standard (similar to Johnson-Cook) model. Some qualitative effects and quantitative estimates concerned about the influence of the resistance to deformation at high-rate strain and anomalous hardening on the cutting process were obtained.