Title: Die structure analysis of stress distribution during High-Strength Steel stamping process and experimental validation

Authors: G.B. Zhang, J. Chen, Y.C. Tang, L. Chen, A. Wang, H. Xiao, L. Shi, H.M. Jiang

Addresses: Department of Plasticity Engineering, Shanghai Jiao Tong University, 1954 Huashan Rd, Shanghai 200030, PR China. ' Department of Plasticity Engineering, Shanghai Jiao Tong University, 1954 Huashan Rd, Shanghai 200030, PR China. ' Department of Plasticity Engineering, Shanghai Jiao Tong University, 1954 Huashan Rd, Shanghai 200030, PR China. ' Department of Plasticity Engineering, Shanghai Jiao Tong University, 1954 Huashan Rd, Shanghai 200030, PR China. ' Research and Innovation Center, Ford Motor Company, Dearborn, Michigan 48120, USA. ' Technical Center, Baoshan Steel and Iron Co. Ltd, Shanghai 201900, PR China. ' Technical Center, Baoshan Steel and Iron Co. Ltd, Shanghai 201900, PR China. ' Technical Center, Baoshan Steel and Iron Co. Ltd, Shanghai 201900, PR China

Abstract: High-Strength Steel (HSS) is being widely used in automotive industry. However, load condition on die structure for HSS stamping increases sharply. A method for die-structure FEA analysis was proposed in this paper. The interaction force between forming blank and die faces was mapped onto die faces to serve as load boundary conditions for die structure analysis. A hyperbolic-bottomed-cup-drawing die was analysed and validated by experiment under several forming conditions. Results show that the predicted Von Mises stress values at specified positions coincides with the experimental ones as well within 15% error.

Keywords: die structure analysis; load mapping; HSS; high strength steel; numerical simulation; stress distribution; stamping; automotive materials; automobile industry; FEA; finite element analysis; drawing dies; interaction force; forming blanks; die faces.

DOI: 10.1504/IJMPT.2010.032099

International Journal of Materials and Product Technology, 2010 Vol.38 No.2/3, pp.184 - 197

Available online: 10 Mar 2010 *

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