Blade materials, testing methods and structural design - Wind Power Generation and Wind Turbine Design - page 453

Figure 23: Buckling-driven delamination map used to determine the effect of
varying delamination size and through-thickness position on buckling
mode. The panels are square with width b = 40 mm and are loaded in
compression in the vertical direction. Square delamination with a =
10, 15 and 25 mm are present in the position A, C, or D indicated in
Fig. 25 [ 68 ].
Figure 24: Normalized compressive failure stress versus normalized failure load.
Labels on experimental data indicate the through-thickness positions
(shown in Fig. 25) as well as the relative delamination size [68].