This article is cited in 3 papers

Necessary and sufficient fracture criteria for a composite with a brittle matrix. Part 2. High-strength reinforcement

V. M. Kornev, A. G. Demeshkin

Lavrent'ev Institute of Hydrodynamics, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090

Abstract: Experimental results on fracture of composite specimens with a brittle matrix are given. A modification is proposed for the shear model that describes deformation of a composite with failed matrix. A three-parameter sufficient criterion of quasibrittle strength of the composite is constructed, based on the equations of an orthotropic medium. Simple analytical expressions that relate the macrocrack length to the loading, structural, stiffness, and strength parameters of the composite medium are obtained. An approach for constructing multi-parameter criteria that take into account special features of deformation of the materials of the composite components is discussed.

Keywords: fracture criteria, composite, reinforcement, pre-fracture zone, multi-parameter criteria.

UDC: 539.375

Received: 11.07.2002

 English version: Journal of Applied Mechanics and Technical Physics, 2003, 44:3, 425–431

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