Third M.I.T. Conference on Computational Fluid and Solid Mechanics June 14–17, 2005  

Applications of planar isotropic yield criteria to porous sheet metal under a deep drawing simulation

K.-C. Liao*
Mingchi University of Technology, Department of Mechanical Engineering, Taipei, Taiwan

  Full Text
Macroscopic yield criteria for porous ductile sheet metals with planar isotropic matrices were proposed recently. The matrix surrounding voids is assumed to follow various planar isotropic yield functions in the current study. Effects of the macroscopic porous yield criterion and the yield function of the corresponding matrix on the sheet metal under a cylindrical cup deep drawing operation are investigated. Simulation results show that the macroscopic yield criterion of the porous sheet metal and the yield function of the corresponding matrix control the strain distribution and the strain localization. Early localization could be induced for the sheet with relatively small initial void volume fraction.

Keywords:  Porous sheet metal; Planar isotropic yield criterion; Gurson yield criterion; Void volume fraction; Deep drawing forming; Finite element analysis

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