O_Stodieck, the book is "Practical Analysis of Aircraft Composites". The [d] properties are just from the [a], [b], [d] instead of the [A], [B], [D]. You can also use Exb (or Eby depending on the orientation) for this problem as well. All of those calculated in eLaminate here btw: https://www.espcomposites.com/software/download.html
Regarding the issue, we know that the isotropic is OK (so its probably not an element issue or general issue). I would first try just a MAT8 orthotropic material (no PCOMP) and make sure that is behaving properly. If so, then we can look that the PCOMP further. The fact that you said changing the ply angles had no effect may mean there is an issue. But first I would like to isolate the issue to either the MAT8 side (as a general orthotropic material, but not a composite) or the PCOMP side. Then I can take a deeper look into as well...but something seems odd. I have not used composites in MYSTRAN, but that is something we need to make sure is correct.
Regarding the issue, we know that the isotropic is OK (so its probably not an element issue or general issue). I would first try just a MAT8 orthotropic material (no PCOMP) and make sure that is behaving properly. If so, then we can look that the PCOMP further. The fact that you said changing the ply angles had no effect may mean there is an issue. But first I would like to isolate the issue to either the MAT8 side (as a general orthotropic material, but not a composite) or the PCOMP side. Then I can take a deeper look into as well...but something seems odd. I have not used composites in MYSTRAN, but that is something we need to make sure is correct.