The effect of sliding interfaces and inhomogeneous interphases on thermal and elastic properties of composites
In the first problem, a composite containing either aligned or randomly oriented short fibers of spheroidal shape is studied. The interface between matrix and fiber allows sliding such that shear tractions are specified to vanish. Thermal stresses and thermal expansion coefficients of composites are determined by taking the matrix and the fiber to be isotropic in stiffness and transversely isotropic in thermal expansion coefficients. The effect of interface on thermal stresses and properties is investigated by comparing results for the sliding case with results for the perfectly bonded case. In the second problem, a composite containing aligned long fibers of cylindrical shape distributed uniformly in the matrix is studied. The thermal and elastic properties are assumed to be isotropic in the interphase and the matrix, and transversely isotropic in the inclusion is assumed to be inhomogeneous. The effect of this interphase on the local elastic fields and the overall thermal and elastic properties is studied. The thermal and elastic properties are assumed to be isotropic in the interphase and the matrix, and transversely isotropic in the in inclusion. The effective elastic constants and thermal expansion coefficients are derived by using the composite cylinders assemblage model (Hashin and Rosen, 1964) and the generalized self-consistent scheme (Kerner, 1956; Christensen and Lo, 1979).
- Research Organization:
- Michigan State Univ., East Lansing, MI (United States)
- OSTI ID:
- 7228710
- Country of Publication:
- United States
- Language:
- English
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