Determination of Interfacial Debond Mode for Fiber‐Reinforced Cementitious Composites
Publication: Journal of Engineering Mechanics
Volume 120, Issue 4
Abstract
Theoretical models of mechanical properties of fiber reinforced cementitious composites require assumptions of fiber‐cement interfacial behavior. In this paper, strength‐based and fracture‐based fiber debonding criteria are reviewed. To determine whether interfacial debonding is governed by the bond strength or critical energy release rate of the fiber‐matrix interphase, fiber pull‐out experiments were conducted using steel and brass wires of various diameters. The bond properties, including effective bond strength and frictional stress, were interpreted through a theoretical model of fiber pull‐out. It was found that, for the material systems tested, interfacial debonding is dominated by frictional stress which is independent of the fiber diameters. Therefore, the debond mode of these material systems is categorized as strength‐based. In general, the debond mode is a material characteristic and is dependent on the specific fiber and matrix types. In order to precisely predict the mechanical response of a fiber reinforced cementitious composite, it is necessary to determine the debond mode for a particular material system following the methodology proposed in this paper.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 120 • Issue 4 • April 1994
Pages: 707 - 719
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Feb 19, 1993
Published online: Apr 1, 1994
Published in print: Apr 1994
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