Fiber Orientation Tensor

It may be useful to adjust the fiber orientation tensor in a sensitivity study to understand its effect on the material model. This could be particularly important for single-element models.

*FIBERORIENTATIONTENSOR
A11, A22, A33, A12, A13, A23

where Aij represent the components of the fiber orientation tensor in global coordinates. The *FIBERORIENTATIONTENSOR keyword must be preceded by a valid *MATERIAL keyword.

As an example, let's assume we are investigating the effect of the fiber orientation tensor on a single-element model. We want to adjust the predicted fiber orientation tensor so that it represents a 2D random distribution of fibers in the plane.

*MATERIAL, NAME=CA-PLASTIC-1
*FIBERORIENTATIONTENSOR
0.5, 0.5, 0, 0, 0, 0