Table 2 Example single patch: first and second order derivatives of the shape functions \(N_i(\xi ,\eta )\) evaluated on the quadrature point p10 (see Fig. 21) with the parameters \(\xi =1.2679\) and \(\eta =0.8452\) (see Listing 10)

\(cp\ id\)

\(\frac{\partial N}{\partial \xi }\)

\(\frac{\partial N}{\partial \eta }\)

\(\frac{\partial N}{\partial \xi ^2}\)

\(\frac{\partial N}{\partial \eta ^2}\)

\(\frac{\partial N}{\partial \xi \cdot \partial \eta }\)