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Prediction of forming limits for porous materials using void-size dependent model and bifurcation approach

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Academic year: 2021

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Figure

Fig. 1. Parametric yield surface for  f = 0.1  and  Γ = 0, 0.2 and 0.43 .
Fig. 2. Schematic illustration of localization band in the plane of sheet metal.
Fig. 3. Boundary conditions for single finite element (C3D8R) subjected to in-plane biaxial  stretching
Fig. 5. Evolution of: (a) normalized equivalent stress, and (b) porosity, for stress triaxiality T=1  and initial porosity  f 0 = 0.01
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