Title

Axisymmetric Fiber Orientation Distribution of Short Straight Fiber in Fiber-Reinforced Concrete

Authors

Authors

J. Xia;K. Mackie

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

ACI Mater. J.

Keywords

arbitrary cut plane; orientation factor; ultimate tensile strength; uniformity parameter; STEEL FIBERS; COMPOSITES; STRENGTH; Construction & Building Technology; Materials Science, Multidisciplinary

Abstract

The anisotropic orientation distribution of short fibers in fiber-reinforced concrete and the impact on mechanical properties have been established in past research. In this paper; the cast-flow induced anisotropic fiber distribution was categorized as axisymmetric with respect to the cement paste flow direction. The probabilistic spatial orientation for fibers is introduced using the beta distribution and uniformity parameters. Either theoretical or approximate equations for the orientation factor and the probability density function of the crossing angle were derived for any arbitrary cut planes. The derived orientation factor equation can be used to quantify the degree of anisotropy via image analysis. This process is easier and more accurate because instead of detailed orientation information for every single fiber, only total fiber counts on the cut sections are needed. The probabilistic macro-mechanical properties, such as ultimate tensile strength, are estimated based on the selected micro-mechanical model that defines the single fiber-matrix interactions.

Journal Title

Aci Materials Journal

Volume

111

Issue/Number

2

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

133

Last Page

141

WOS Identifier

WOS:000333575400002

ISSN

0889-325X

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