Attempt to solve the torsion of a rectangular section shown in Fig. 9.12 by using the boundary

Question:

Attempt to solve the torsion of a rectangular section shown in Fig. 9.12 by using the boundary equation method. Show that trying a stress function created from the four products of the boundary lines x =± a and y=± b will not satisfy the governing equation (9.3.9).

Fig 9.12