title: Effect of inelastic shear stress at the interfaces in the material with a unidirectional fibrous structure on the SIF for a crack in the fiber and the energy absorbed at fiber fracture.
abstract: The paper suggests considering the presence of inelastic shear mechanisms in the direction of the maximum tensile stress and the absence of these mechanisms in the other directions as the main feature of a structural material of biological origin. A "cracked fiber in tube" model is used for the study of the effect of interface cohesive strength on the stress intensity factor (SIF) for a crack in the fiber and on the energy absorbed under inelastic shear at the interface of fibers at their fracture. The values of the cohesive strength of the interface between the fibers and the distance between the cracks in the fiber at which the maximum energy is absorbed at material fracture at the stage of the crack growth in the fibers are obtained. This stage precedes the pullout process of the completely fractured fibers.
authors.affiliation: Pisarenko Institute for Problems of Strength, Timiryazevska Street 2, 01014 Kiev, Ukraine.
authors.forename: Alexandra V
authors.initials: AV
authors.lastname: Borovik
authors.affiliation: Frantsevich Institute for Problems of Materials Science, Krzhizhanovsky Street 3, 03680 Kiev-142, Ukraine. Electronic address: v_borovik@inbox.ru.
authors.forename: Valery G
authors.initials: VG
authors.lastname: Borovik
mesh_terms: D065966:Absorption, Physicochemical; D032701:Biomimetics; D004548:Elasticity; D008962:Models, Theoretical; D013314:Stress, Mechanical; D013499:Surface Properties; D013718:Tensile Strength
keywords: Bio-inspired structural material; Crack; Energy absorption; Fiber; Fracture; Interface