Analysis of FCC sheet metal forming with rate-independent polycrystalline plasticity FEM^①

来源期刊：中国有色金属学报(英文版)2004年第2期

论文作者：张少睿 李大永 罗应兵 彭颖红

文章页码：362 - 365

Key words：FCC sheet metal; rate-independent; texture; polycrystalline plasticity FEM; orientation probability assignment

Abstract: A rate-independent polycrystalline plasticity constitutive model considering self and latent hardening was developed. Next, a new orientation probability assignment method was proposed and the crystal orientations were assigned to FE integration points, which represent crystals and can rotate individually. Then cup drawing of FCC aluminum sheet wasstudied using crystalline plasticity finite element analysis. The results show that the validity of proposed model is proved through comparison between numerical results and experimental ones. {001}〈110〉texture can lead to earing at 45°direction, while {124}〈211〉texture at 0°and 90°directions. For the rolled aluminum sheet, which contains strong {001}〈110〉texture, earing is formed at 45°direction after cup drawing. For the annealing aluminum sheet, due to the balance between two main textures, the flange earing tendency is not obvious.