Prediction of Deep Drawing Ratio for DP800 Steel by Using Modified-Mohr-Coulomb Damage Criteria

Authors : Nuri Şen, Tolgahan Civek, Elifnaz Baba

Pages : 735-751

Doi:10.29130/dubited.1610838

View : 32 | Download : 45

Publication Date : 2025-04-30

Article Type : Research Paper

Abstract :The demand for low-cost production in vehicle manufacturing while complying with the safety and environmental regulations is an enormous challenge. To comply with these challenges, sheet metal forming industries now extensively use advanced high-strength steels (AHSSs) in their products. However, due to excellent strength levels of AHSSs, problems arising in their forming stage, such as large spring-back and fracture, hinder the manufacturing process. At this stage, implementing finite element analysis (FEA) in the design processes greatly improves manufacturing processes since it allows determining possible forming errors before the actual forming process. In this study, the formability of DP800 steel has been investigated by carrying out deep drawing experiments. For that, a series of circular sheet metals, whose diameters were incrementally increased, have been deep drawn to a cup shape to determine the limiting drawing ratio (LDR). Additionally, Modified Mohr-Coulomb damage model has been utilised to predict the LDR in FEA. It has been found that the LDR of DP800 is 2.13 and the implemented damage model can successfully predict the LDR within only 2.35% error.
Keywords : DP800 Çeliği, Derin çekme oranı, Sonlu elemanlar analizi