Improved Nonlinear Model for Concrete Fracture
Publication: Journal of Engineering Mechanics
Volume 116, Issue 2
Abstract
A nonlinear model for the fracture process zone (FPZ) that exists at the tip of a crack in concrete is developed through the interactive use of experimental data and finite element analysis of crack‐line‐wedge‐loaded double‐cantilever‐beam (CLWL‐DCB) specimens. That model relates the clamping stress to the crack opening displacement (COD) and is characterized by three straight‐line stress variations segmented by three critical CODs. In the first segment the clamping stress equals the concrete's tensile strength. In the second segment the crack closure decreases sharply with increasing CODs from the tensile strength at about in. (0.01 mm) to 0.3 times that stress at about in. (0.05 mm). The validity of that model is demonstrated by showing that it can predict the results of tests on five different groups of CLWL‐DCB specimens subjected to mode I loadings.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 116 • Issue 2 • February 1990
Pages: 429 - 445
Copyright
Copyright © 1990 ASCE.
History
Published online: Feb 1, 1990
Published in print: Feb 1990
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