Figure 16.

Finite element models showing the strain distribution for: (a) Case 1 (30 $\times$ 30); (b) Case 2 (40 $\times$ 40); (c) Case 3 (50 $\times$ 50); (d) Case 4 (60 $\times$ 60); (e) Case 5 (80 $\times$ 80); (f) Case 6 (100 $\times$ 100).