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Interface failure modes explain non-monotonic size-dependent mechanical properties in bioinspired nanolaminates.


ABSTRACT: Bioinspired discontinuous nanolaminate design becomes an efficient way to mitigate the strength-ductility tradeoff in brittle materials via arresting the crack at the interface followed by controllable interface failure. The analytical solution and numerical simulation based on the nonlinear shear-lag model indicates that propagation of the interface failure can be unstable or stable when the interfacial shear stress between laminae is uniform or highly localized, respectively. A dimensionless key parameter defined by the ratio of two characteristic lengths governs the transition between the two interface-failure modes, which can explain the non-monotonic size-dependent mechanical properties observed in various laminate composites.

SUBMITTER: Song ZQ 

PROVIDER: S-EPMC4814825 | biostudies-literature | 2016 Mar

REPOSITORIES: biostudies-literature

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Interface failure modes explain non-monotonic size-dependent mechanical properties in bioinspired nanolaminates.

Song Z Q ZQ   Ni Y Y   Peng L M LM   Liang H Y HY   He L H LH  

Scientific reports 20160331


Bioinspired discontinuous nanolaminate design becomes an efficient way to mitigate the strength-ductility tradeoff in brittle materials via arresting the crack at the interface followed by controllable interface failure. The analytical solution and numerical simulation based on the nonlinear shear-lag model indicates that propagation of the interface failure can be unstable or stable when the interfacial shear stress between laminae is uniform or highly localized, respectively. A dimensionless k  ...[more]

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