SYMPOSIA PAPER Published: 01 January 1993

Fracture Energy Dissipation Mechanism of Concrete


Moiré interferometry was used to determine the crack opening displacements (COD) along a stably or dynamically propagating crack in three-point-bend concrete specimens. For stable crack growth studies, the measured COD together with applied loading was input to a finite element model of the specimen to determine directly the crack closure stress (CCS) versus COD relationship along the fracture process zone (FPZ) that trailed the crack tip. For dynamic crack growth studies, the COD data together with three strain gage data taken along the crack path were used in an inverse analysis to extract the CCS versus COD relationships using a dynamic finite element model of the fracturing specimen. Variations in energy release and dissipation rates with crack extension were determined and the FPZ was identified as the major energy sink in concrete fracture.

Author Information

Guo, Z
University of Washington, Seattle, WA
Yon, J-H
University of Illinois, Urbana, IL
Hawkins, NM
University of Illinois, Urbana, IL
Kobayashi, AS
University of Washington, Seattle, WA
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Developed by Committee: E08
Pages: 797–805
DOI: 10.1520/STP24303S
ISBN-EB: 978-0-8031-5241-0
ISBN-13: 978-0-8031-1867-6