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IssuesArchive of Issues2011-3pp.416-424

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V.M. Kornev, "Prefracture Zone for Longitudinal Shear Cracks in Structured Materials," Mech. Solids. 46 (3), 416-424 (2011)
Year 2011 Volume 46 Number 3 Pages 416-424
DOI 10.3103/S0025654411030083
Title Prefracture Zone for Longitudinal Shear Cracks in Structured Materials
Author(s) V.M. Kornev (Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, pr-t Akad. Lavrentyeva 15, Novosibirsk, 630090 Russia, kornev@hydro.nsc.ru)
Abstract We obtain simple relations for the following critical fracture parameters of elastoplastic materials: the shear stresses, the prefracture zone length, and the stress intensity factor for mode III of fracture. There is a passage to the limit from a sufficient fracture criterion to a necessary fracture criterion as the prefracture zone length tends to zero. The critical stresses obtained from the necessary and sufficient criteria are substantially different. In the framework of the proposed model, the critical stress intensity factor obtained from the sufficient criterion depends on the grain diameter and the parameters of the τ-γ diagram of the material.
Keywords quasibrittle fracture, longitudinal shear crack, critical stress intensity factor
References
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Received 13 November 2008
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