Abstract：High-strength steel is an effective way to reduce automobile masses, with the forming limit curve of the steel as an important tool for evaluating the sheet metal forming. A forming limit curve simulation prediction method for the anisotropic high-strength steel Q490C is given here based on the maximum punch force criterion to reduce experiment costs and shorten the development cycle. The results are then fit to correlations. The simulations agree well with experimental data. The simulated curve intercept agrees well with the Keeler's formula. Thus, the finite element predictions of the forming limit curve used in this paper can accurately predict the forming limit curve for anisotropic sheets, which lays a foundation for blank stamping forming.
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2019, Vol. 59 
