The influence of microstructure randomness on prediction of fiber properties in composites
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© The Author(s) 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav. Elastic properties were predicted for AS4, IM7, T300, and T650-35 graphite fibers. An inverse method was employed using lamina and epoxy properties taken from literature. Fiber properties predicted using finite element analysis based on a hexagonal microstructure, finite element analysis based on a random microstructure, and the Mori-Tanaka averaging scheme were compared. It was observed that the Mori-Tanaka averaging scheme and finite element analysis based on a hexagonal microstructure predicted nearly identical fiber properties. In contrast, randomness in the arrangement of fibers results in significantly different predictions for the longitudinal shear modulus of the fiber. The three microstructural models were also used to predict properties for isotropic E-glass 21xK43. It was observed that the three models predicted nearly the same properties for the glass fibers.
author list (cited authors)
Ballard, M. K., McLendon, W. R., & Whitcomb, J. D.