Normal/Shear Cracking Model: Application to Discrete Crack Analysis
Publication: Journal of Engineering Mechanics
Volume 123, Issue 8
Abstract
A simple but general model for normal/shear cracking in quasi-brittle materials is presented. It is defined in terms of the normal and shear stresses on the average plane of the crack and the corresponding normal and shear relative displacements. A crack surface in stress space determines crack initiation under pure tension, shear-tension, or shear-compression loading. Two independent fracture energy parameters are used: the classical Mode I fracture energy , and the asymptotic Mode II fracture energy under very high shear-compression and no dilatancy. The cracking model proposed can be implemented in two ways: directly as the constitutive law of an interface element in the context of discrete crack analysis, or as the law of a generic cracking plane in a multicrack formulation in the context of smeared crack analysis. In this paper, the first approach is presented and examples are given of numerical constitutive testing and verification with experimental data.
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Published In
Journal of Engineering Mechanics
Volume 123 • Issue 8 • August 1997
Pages: 765 - 773
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Copyright © 1997 American Society of Civil Engineers.
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Published online: Aug 1, 1997
Published in print: Aug 1997
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