<CRITERION> anisotropic

Description

This criterion is the classical energy equivalent form due to von Mises. Here the effective stress is calculated based on the \(J_2\) stress invariant:

(346)\[f_{cr} = \sqrt{\dfrac{3}{2}(\ten s-\ten X):\tenf M:(\ten s-\ten X)} - R\]

where \(\ten s\) is the deviatoric component of stress.

**<cmd> anisotropic matrix-type \(~\,~\,\) coefficients

The input matrix-type indicates one of the COEFFICIENT_MATRIX type keywords, and the coefficients will depend on the matrix chosen (e.g. diagonal, orthotropic, etc).

Example

brief example using the anisotropic criterion is:

*criterion anisotropic orthotropic
   c11 .44667    c22 .58    c33  .666
   c44 0.        c55 1.7    c66  0.
   c12 -.18      c23 -.4    c31 -.26667

The *criterion command indicates the application of the created criterion object in the higher-level, so can generally be different depending on the application.