A flat symmetric hexagonalsteelplateis described in Figure 1.The plate is uniform, but the circular zone in the figure illustrate the region upon which a localised pressure of 40kN/m2is to be applied, The steelfor the plate has E= 207GPa, ν= 0.32,σY= 625MPaandrho = 7.85 kg.l-1. The thickness of the plate is 4mm. The plate is supported on all sixsidesof its perimetr.