STP1045

    Fiber-Reinforced Composites: Models for Macroscopic Elastic Constants

    Published: Jan 1990


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    Abstract

    Considering uniaxial-fiber-reinforced composites, we review selected models for calculating macroscopic elastic constants from the constituent elastic constants (fiber and matrix) and the phase geometry. Especially, we focus on the transverse-isotropic case with five independent elastic-stiffness constants, Cij. Also, we focus on wave-scattering ensemble-average methods developed by Bose and Mal (1974) and by Datta and Ledbetter (1983, 1984). We compare the model results with measurements made by pulse-echo dynamic (MHz) methods. As examples, we consider B/Al and Gr/Mg; the latter fibers possess high elastic anisotropy.

    Keywords:

    composites, elastic constants, fiber-reinforced composites, physical properties, sound velocities, theoretical models, ultrasonic-velocity method


    Author Information:

    Datta, SK
    research metallurgist, CIRES, University of ColoradoNISTNBS, BoulderBoulder, ColoradoColorado

    Ledbetter, HM
    research metallurgist, CIRES, University of ColoradoNISTNBS, BoulderBoulder, ColoradoColorado


    Paper ID: STP24620S

    Committee/Subcommittee: E28.03

    DOI: 10.1520/STP24620S


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