The failure evaluation equations are all in plane stresses (contain only s11,s12,s13,s22) These failure evaluations are changed to equations presented in [3] rft = (s11*f1tInv )**2 rfc = abs(s11) * ...

There are four nodes 1,2,3 and 4, and there are 5 Coefficients S11,S21, S12,S22 and R2. If we set node 1 as an independent input node, and choose node 3 as a dependent node we get the following ...