STP893

    Elastic Stiffness of Three-Dimensional Braided Textile Structural Composites

    Published: Jan 1986


      Format Pages Price  
    PDF Version (232K) 18 $25   ADD TO CART
    Complete Source PDF (8.9M) 18 $65   ADD TO CART


    Abstract

    A methodology based upon the concept of fabric unit cell structure and an energy approach has been developed for studying the elastic properties of three-dimensional fabric composites. In general, the unit cell assumes the shape of a parallelepiped with its size determined by the weaving parameters. The yarns can assume the positions along the edges and diagonals in a unit cell, and each unit cell is centered around an “interlock” of yarns. To facilitate the analysis of complex yarn interactions, the unit cell is projected onto mutually orthogonal planes. Strain energies due to yarn axial extension, bending, and lateral compression are then considered in the two-dimensional plane weave structures. Closed-form expressions for axial elastic moduli and Poisson's ratios have been derived as functions of fiber volume fractions and fiber orientations. Numerical examples and experimental results of elastic properties for three-dimensional braided composites are presented.

    Keywords:

    composite materials, fabric composites, three-dimensional braided fabrics, elastic properties


    Author Information:

    Ma, C-L
    Visiting scholar, graduate student, and professor, University of Delaware, Newark, DE

    Yang, J-M
    Visiting scholar, graduate student, and professor, University of Delaware, Newark, DE

    Chou, T-W
    Visiting scholar, graduate student, and professor, University of Delaware, Newark, DE


    Paper ID: STP35360S

    Committee/Subcommittee: D30.05

    DOI: 10.1520/STP35360S


    CrossRef ASTM International is a member of CrossRef.