Limit strains variability with respect to material scatter
Keywords:metal forming, failure, sheet metal
In this paper a study regarding to the effect of the variability of the mechanical parameters on the prediction of the limit strain have been presented. The necking criterion used in the analyses is the one proposed by Marciniak-Kuczinsky [M-K]. The inelastic behaviour of the sheet metal has been described by BBC2005 yield criterion and Hill48 yield criterion respectively. The Swift’s formulation has been used in order to describe the hardening of the material. The material investigated in this paper is DC04 steel sheet (0.85 mm thickness).
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