FEM Simulation of Anisotropic Parameters Influencing the Earing in Sheet Metal Deep Drawing Process
Earing is often undesirable in the production of deep drawn containers because it results in a nonuniform cup height. A finite element model for earring analysis is developed considering only the flange area of the sheet. It was found that the draw-in depth of the flange increases with the increase of the r value, and it remains invariable when r value is larger than 2. With the increase of the r value, the max thickness decreases and the min thickness increases. If △r>0, four earings are formed. If △r =0, the material characteristics in all the planar directions are same. The flange uniformly flows into the die cavity, no earing is formed. If △r<0, four earings are formed. The earing distribution is dominated by r0, r45 and r90. Both r and △r have much effect on the earing distribution.
Xingui He, Ertian Hua, Yun Lin and Xiaozhu Liu
L. Chen "FEM Simulation of Anisotropic Parameters Influencing the Earing in Sheet Metal Deep Drawing Process", Applied Mechanics and Materials, Vols. 88-89, pp. 638-641, 2011