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    Please use this identifier to cite or link to this item: https://irlib.pccu.edu.tw/handle/987654321/3019


    Title: The effects of Poisson contraction on matrix cracking in brittle-matrix composites
    Authors: Chiang YC
    Contributors: 機械系
    Keywords: brittle-matrix composite
    matrix cracking
    fiber-bridged crack
    Poisson contraction
    critical stress
    Date: 2001
    Issue Date: 2009-12-11 12:04:40 (UTC+8)
    Abstract: The effects of Poisson contraction on matrix cracking in unidirectional fiber-reinforced brittle-matrix composites are studied in this paper. The fibers, initially held in the matrix by a compressive pressure due to the thermal expansion mismatch, are subjected to frictional slipping over the matrix as soon as a fiber-bridged crack is formed The friction between the fibers and the matrix is assumed to follow the Coulomb friction law. A shear-lag model, which includes the Poisson contraction and the friction due to the relative fiber/matrix slipping, is adopted to calculate the stress and strain fields in the fibers and matrix. Using the energy balance approach, a relation for the critical matrix cracking stress for propagating of a semi-infinite fiber-bridged crack is derived. The results obtained show that the Poisson contraction has a strong effect on the predicted matrix cracking stress in brittle-matrix composites, especially in composites with a stiff matrix.
    Relation: MECHANICS OF COMPOSITE MATERIALS Volume: 37 Issue: 3 Pages: 207-216
    Appears in Collections:[Department of Mechanical Engineering ] journal articles

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