فهرست نشریات علمی دسترسی آزاد ایران

In this study, the coefficient of friction in bulk metal forming processes was investigated using the ring compression test for two different materials: lead and plasticine. The main objective was to determine the friction coefficients under various lubrication conditions by employing both theoretical calibration curves and numerical simulations using ANSYS software. The experimental data, including dimensional changes during the ring test, were compared to simulation results to extract accurate values for the coefficient of friction. The discrepancies between theoretical and numerical outcomes were primarily attributed to strain hardening and other modeling considerations not accounted for in analytical methods. The study showed that numerical simulations provided more realistic estimates of frictional behavior, making them better suited for industrial applications. Furthermore, the results confirmed that using a combined lubricant of talc powder and vegetable oil significantly reduced the coefficient of friction compared to using talc powder alone. This research highlights the importance of selecting appropriate lubricants and modeling methods for accurate prediction and optimization of metal and polymer forming processes. Overall, combining experimental testing and finite element analysis presents a comprehensive and effective approach to evaluating tribological conditions in forming operations.