Reply To: How Do I Add A Material Which Properties Depend On Direction In Engineering Data

[Armin]

Hi Dada,
These are the normalized yield stresses with respect to a reference direction. For example, when the yield stress ratio of your material in the x-direction is 1 (530/530), the yield stress ratio in the y direction will be 0.96 (510/530). If you don't know your materials response in some directions, as an initial guess, you can set their behavior to that of an isotropic von Mises material (i.e. tensile stress ratios will be 1 and shear stress ratios will be 0.58). Please check the documentation to learn more about the Hill criterion: 4.4. Rate-Independent Plasticity (ansys.com)

Anisotropic elasticity can also be considered in Ansys Mechanical but for large deformation application, like in metal forming, the anisotropic elasticity is typically neglected since the elastic deformation is a very small portion compared to plastic deformation. Check also more details in the documentation for anisotropic elasticity.