Forming of 2A12 Aluminum Alloy Double Curvature Thin-Wall Part Based on the Hill (1948) Anisotropic Yield Criterion
In order to solve the existing problems such as the less-plump corners and wrinkle during the forming process of a double curvature thin-wall part. Material parameter formulas are calculated based on Hill 1948 anisotropic yield criterion and flow rule. The material mechanical property parameters of 2A12 are obtained using uniaxial tensile experiment. Single factor test method is used and LS-DYNA is applied to conduct finite element analysis. So the influence law of holding force, blank shape and blank size imposed on the finite element model are calculated in sequence. On the basis of these laws, that the blanking force, blank dimension and blank shape are decided. Stamping die for the experiment model is designed and made, deformation measurement technology of coordinate grid circle is used to carry out strain analysis. From the comparison result between experiment and simulated data, it can be seen that Hill 1948 yield criterion and flow law can better solve the formability of 2A12 sheet.
Xie Yi and Li Mi
D. H. Zhang et al., "Forming of 2A12 Aluminum Alloy Double Curvature Thin-Wall Part Based on the Hill (1948) Anisotropic Yield Criterion", Advanced Materials Research, Vols. 129-131, pp. 1176-1180, 2010