Fig. 3: Fracture toughness and crack growth from a notch. | Nature Communications

Fig. 3: Fracture toughness and crack growth from a notch.

From: Lamellar architectures in stiff biomaterials may not always be templates for enhancing toughness in composites

Fig. 3

a Geometry of a fracture test specimen with a notch cut in it. A cross-sectional view shows the notch length, a, and ligament area, A−. b When loaded in flexure, a crack grows from the notch root. The crack length, Δa is shown in the corresponding cross-sectional view. c Crack growth resistance curves of nacre, nacre-inspired composites made of aluminum oxide tablets, and monolithic aluminum oxide obtained by1 and9. The crack growth resistance is given here in terms of the J-integral (modified with permission from1 copyright Nature Publishing Group).

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