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

    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

    Share

    COinS