Wow... turns out the comparison with finite difference on the xy shear strain was a roundoff error issue; the finite difference needed to be > 10^-5 (now using 10^-4). Comparison is spot-on.
Wow... turns out the comparison with finite difference on the xy shear strain was a roundoff error issue; the finite difference needed to be > 10^-5 (now using 10^-4). Comparison is spot-on.

DallasTrinkle/Onsager,DallasTrinkle/Onsager