Yes TGS4 Sec VIII and III
I made a sub routine in matlab for calculate membrane, bending, membrane+bendig stress, using stress tensor components and I obtained the same result that in femap. But I have so many doubt about the procedure used for calculate the integrals shown in Sec VIII, Div2 Apendix 5A.
Do you have some papers or guide that estimate these integrals?
Thank!