Research Article
Jun 1977
Progressive Failure in a Model Heterogeneous Medium
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VIEW THE REPLYPublication: Journal of the Engineering Mechanics Division
Volume 103, Issue 3
Abstract
The difficulties of testing brittle heterogeneous materials are considered in the context of obtaining representative data to complement theoretical studies. It is suggested that many of these difficulties can be avoided by using a model material which can be specified numerically and examined by computation. A model of this sort is described, consisting of a plane pin-jointed random network structure of linear elastic brittle members having a range of different strengths and stiffnesses. Results of calculations simulating uniaxial extension tests are given. These show that the model material softens under increasing strain in much the same way as a range of physical materials including rock, concrete, and nonwoven fabrics. The model is used to demonstrate the effect of changes in heterogeneity on the form of the stress-strain curve, the existence of size effects and the possibility of localized failure. Results support the view that the model will be useful in a further investigation of behavior under more general deformation conditions.
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Published In
Journal of the Engineering Mechanics Division
Volume 103 • Issue 3 • June 1977
Pages: 365 - 376
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Jun 1977
Published online: Feb 3, 2021
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Authors
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Nicholas J. Burt
Engr., Sir William Halcrow and Partners, Consulting Engrs., London, England
John W. Dougill, M.ASCE
Prof. of Engrg. Sci., King's College, London, England
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.