Figure 3
In-situ double cantilever beam testing of bioinspired platelet-epoxy composites. (a,b) Diagram and SEM image of the in-situ DCB setup. Scale bar 1mm. (c) Crack resistance curves of each composite, plotted from 6 tests. SEM images showing: (d) delamination of layers during trans-filament fracture, scale bar 300 μm, (e) deflection around filaments during inter-filament fracture, scale bar 300 μm, (f) crack deflection in the Bouligand structure, scale bar 300 μm, (g) large scale bridging, scale bar 20 μm, (h) small scale bridging of individual platelets, scale bar 10 μm, (i) SEM fractography of the Bouligand material showing a twist of the crack plane, scale bar 0.5 mm.
