title: 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.
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Song
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
authors.forename: Y
authors.initials: Y
authors.lastname: Ni
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
authors.forename: L M
authors.initials: LM
authors.lastname: Peng
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
authors.forename: H Y
authors.initials: HY
authors.lastname: Liang
authors.affiliation: CAS Key Laboratory of Mechanical Behavior and Design of Materials,University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
authors.forename: L H
authors.initials: LH
authors.lastname: He