Research Article
Apr 1979
Blunt Crack Band Propagation in Finite Element Analysis
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VIEW THE REPLYPublication: Journal of the Engineering Mechanics Division
Volume 105, Issue 2
Abstract
A propagating smeared crack band of blunt front is much simpler to model by finite elements than a sharp interelement crack, especially when the propagation direction is unknown. For concrete or rock, a smeared crack band is also more realistic. A strength criterion is generally used for the propagation, but this is not objective because of a strong spurious dependence of results on the chosen element size, Three objective methods, which avoid the use of singularity elements, are proposed. Method A is based on the rate of energy release by the blunt crack band. In method B, the usual strength criterion is used but an adjustment of the strength value according to the element size is proposed. In method C, the propagation direction and crack advance are determined by fitting the Mode I asymptotic series to nodal displacements around the crack front, using an optimization subroutine. Special merits of each method are analyzed and solutions of example problems are compared with exact ones.
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Published In
Journal of the Engineering Mechanics Division
Volume 105 • Issue 2 • April 1979
Pages: 297 - 315
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© 1979 American Society of Civil Engineers.
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Published in print: Apr 1979
Published online: Feb 3, 2021
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Authors
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Zdenĕk P. Bažant, M.ASCE
Prof. of Civ. Engrg., Northwestern Univ., Evanston, Ill.
Luigi Cedolin, M.ASCE
Visiting Scholar, Northwestern Univ., Evanston, Ill.; on leave as Assoc. Prof., Politecnico di Milano, Milano, Italy
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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.