The primary unknowns calculated in a FIC simulation case do not explicitly involve stresses. The following quantities are calculated:
configuration tensor (
) for the amorphous phase orientation tensor (
) for the semicrystalline phase degree of transformation (x)
temperature (T) in a nonisothermal simulation
velocity (
) pressure (p)
The quantity 
given by Equation 12–11 is
evaluated as an auxiliary tensor. Based on these fields, it is possible to calculate
the total extra-stress tensor 
developing in the flow.
By summing the various contributions from Equation 12–2, Equation 12–4, and Equation 12–8, we obtain:
 | (12–19) |
In the right side of the equation, you can identify all three contributions to the total extra-stress tensor. Successively, you can find the contribution of the amorphous phase, the contribution of the semicrystalline phase, and the purely Newtonian contribution.
That extra-stress tensor 
has the same number of components as the other tensorial
quantities, except for planar cases, where only three components are evaluated. The
fourth one, perpendicular to the flow domain, can be evaluated by creating a
function within the graphical postprocessor.