Damage Evolution Evaluation in DP600 Steel According Speed Variation in Sheet Metal Forming
Márcio Madi1; Paulo Victor Prestes Marcondes2; Ravilson Antônio Chemin Filho2; Lucas Marcondes Ribas2
1 IFPR - Instituto Federal de Edução do Paraná; 2 UFPR - Universidade Federal do Paraná
doi:10.20906/CPS/COB-2015-1752
Resumo
The forming is intended to manufacture parts from flat plates. This process has as one of the biggest users in the automotive industry, where the existing competitiveness makes them look to reduction of time and costs. In recent decades the increased competition and the growing demand for safer cars, economical and less polluting demanded of automakers, steelmakers and scientific community invested in the research of new steels. The result of this research was the significant increase in the use of advanced high-strength steels in automobiles. The use of these steels allows working with thinner sheets, however the appearance of flaws in these materials can be often reduced by the thickness. Thus, there is necessity to study the mechanism of formation and execution of ductile fracture in metallic materials. The numerical simulation of mathematical models that describe the failure mechanisms in ductile materials is common practice to investigate which failure criteria, in the literature, best represents the results obtained in experimental practice. Thus, the development of a computational model for simulation and evaluation of criteria for fracture simulation of Advanced High Strength Steels is proposed in this work. The methodology for finding the best operating condition used an optimization technique for obtaining the forming speed. The main results showed a significant improvement in stamping DP600 steel with variation in the stamping speed. Concluding that, for a specific stamping condition can be obtained the optimal operation time, by simulation, to achieve the best result of this forming.
Palavras-chave: Simulation; Forming; Damage; Optimization