Mixed Modes I and II Concrete Fracture: An Experimental Analysis

[+] Author and Article Information
Z. K. Guo, A. S. Kobayashi

Department of Mechanical Engineering, University of Washington, Seattle, WA 98195

N. M. Hawkins

Department of Civil Engineering, University of Illinois at Urbana-Champaign, Champaign, IL 61820-6219

J. Appl. Mech 61(4), 815-821 (Dec 01, 1994) (7 pages) doi:10.1115/1.2901562 History: Received September 14, 1992; Revised September 07, 1993; Online March 31, 2008


The development of the fracture process zone associated with subcritical crack growth in a three-point bend concrete specimen with an off-centered, single-edged precrack was monitored with moire interferometry. The applied load and the crack opening and sliding displacements together with a finite element model of the concrete specimen were used to determine the crack closing stress due to aggregate bridging. Under this mixed-mode fracture, aggregate interlocking increased the crack closing stresses in the fracture process zone and hence the load carrying capacity of the concrete specimen. The dissipated energy rate in the fracture process zone also increased with aggregate interlocking.

Copyright © 1994 by The American Society of Mechanical Engineers
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