Prediction of yield surfaces of textured sheet metals

摘要

To predict the yield surfaces oftextured sheet metals, two methods were conducted.The first method (crystallographic yield surface)is based on the Taylor-Bishop-Hill (TBH)polycrystal model, using the orientationdistribution function (ODF) of the material as aninput. The second method (phenom-enological yieldsurface) makes use of phenomenological yieldfunctions based on mechanical test data.Anisotropic properties for six texture componentstypical of aluminum alloy sheets were examined andthe results based on crystal plasticity werecompared with the results based on phenom-enological yield functions. The experimentalanisotropy measurements obtained for an AA6xxxsheet were also compared to crystallographic and phenomenological predictions.