SEDL / STP / STP1045-EB / STP24620S

Fiber-Reinforced Composites: Models for Macroscopic Elastic Constants

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

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

Pages: 15    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, C^ij. 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.