نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
In this study, the forming limit diagram (FLD) of aluminum/copper bimetallic sheets in the multi-point forming (MPF) process was obtained both experimentally and theoretically using the second derivative method. The experimental results showed less than 10% deviation from the theoretical predictions. In the numerical simulations, the effects of pin diameter, polyurethane layer hardness, and polyurethane layer thickness on the forming limit of the MPF process were systematically analyzed. The simulation outputs were subjected to statistical evaluation, and the results indicated a strong correlation among the studied parameters, confirming the adequacy of the selected modeling approach. The findings showed that a pin diameter of 12 mm provided the optimal configuration, yielding the highest forming limit under all polyurethane layer conditions compared to other pin diameters. Furthermore, for all pin sizes, increasing both the hardness and thickness of the polyurethane layer led to an improvement in the forming limit. However, the influence of layer thickness was found to be more significant, particularly for pin diameters of 8 mm and 15 mm.
کلیدواژهها English
