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

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-l...

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Published inScientific reports Vol. 6; no. 1; p. 23724
Main Authors Song, Z. Q., Ni, Y., Peng, L. M., Liang, H. Y., He, L. H.
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 31.03.2016
Nature Publishing Group
Subjects
639/301/1023/303
639/301/54/989
Humanities and Social Sciences
Mathematical models
Mechanical properties
Mechanical stimuli
multidisciplinary
Science
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Summary: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.
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ISSN:2045-2322
2045-2322
DOI:10.1038/srep23724