Prediction of yield surfaces of textured sheet metals

To predict the yield surfaces of textured sheet metals, two methods were co nducted. The first method (crystallographic yield surface) is based on the Taylor-Bishop-Hill (TBH) polycrystal model, using the orientation distribut ion function (ODF) of the material as an input. The second method (phenomen ological yield surface) makes use of phenomenological yield functions based on mechanical test data. Anisotropic properties for six texture components typical of aluminum alloy sheets were examined and the results based on cr ystal plasticity were compared with the results based on phenomenological y ield functions. The experimental anisotropy measurements obtained for an AA 6xxx Sheet were also compared to crystallographic and phenomenological pred ictions.