Toughening and strengthening bioinspired nanolaminates: Size effect and design insight

Abstract eng:
g Understanding how bioinspired nanolaminate desigl efficiently mitigates the strength—ductility tradeoff in brittle materials via arresting the crack at the interface followed by controllable interface failure is important to fabricate biomimetic laminates with high strength and toughness. By using the nonlinear shear—lag model, the effects of the interface plasticity and the overlapping length between adjacent platelets on the stress field and the failure mode in the laminate are discussed. The size dependent failure modes are identified They could explain the non—monotonic size—dependent mechanical properties observed in various laminate composites and provide guideline for rational desigl of strong and tough bioinspired laminates.

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