《304亚稳态不锈钢拉深成形十字件的数值模拟与实验研究》.pdf

中国科技论文在线 Numerical simulation and experimental study of 304 metastable austenitic stainless steel in cup drawing# ** YE Liyan, LI Xifeng, CHEN Jun 5 (National Engineering Research Center of Die Mold CAD, Shanghai Jiao Tong University, Shanghai 200030 China) Abstract: Two constitutive equations including modified Johnson-Cook and Swift were used to fit the true stress-strain curves of 304 metastable austenitic stainless steel. The fitting results were good. Two simulations of cup drawing with two constitutive equations based on LS-Dyna and the practical 10 experiment of cup drawing were carried out. The comparison of simulation and experiment, from the aspects of thickness variation, load-displacemen curve and major strain, showed that two simulations predicted the thickness variation of the bottom and wall of cup well. The prediction of thinning at the punch radius and thickening at the die radius and flange based on Johnson-Cook was more correct than Swift which was more effective in predicting the load-displacement curve. Two constitutive equations 15 also worked well in predicting major strain distribution at the bottom and punch radius. Key words: modified Johnson-Cook; 304 metastable austenitic stainless steel; cup drawing 0 Introduction SUS304 metastable austenitic stainless steel belongs to transformation-induced plasticity