Anisotropic Elastic Constants of a Fiber-Reinforced Boron-Aluminum Composite
Elastic constants, both the Cij’s and the Sij’s, were measured and calculated for a laminated, uniaxially fiber-reinforced boron-aluminum composite. Three theoretical models were considered: square-array, hexagonal-array, and random-distribution. By combining several existing theoretical studies on randomly distributed fibers, a full set of elastic constants can be predicted for this model. The random-distribution model agrees best with observation, especially for off-diagonal elastic constants. Considering all nine elastic constants, observation and theory differ on the average by six percent.
KeywordsLongitudinal Wave Elastic Constant Random Model Lame Constant Independent Elastic Constant
Unable to display preview. Download preview PDF.
- 1.C. W. Bert, Experimental characterization of composites, in: “Composite Materials, Volume 8, Structural Design and Analysis”, Academic, New York (1975).Google Scholar
- 2.G. P. Sendeckyj, Elastic behavior of composites, in: “Mechanics of Composite Materials, Volume 2”, Academic, New York (1974).Google Scholar
- 3.H. M. Ledbetter, N. V. Frederick, and M. W. Austin, Elastic-constant variability in stainless-steel 304, J. Appl . Phys. 51:305(1980).Google Scholar
- 4.H. M. Ledbetter, Dynamic elastic modulus and internal friction in fibrous composites, in: “Nonmetallic Materials and Composites at Low Temperatures”, Plenum, New York (1979).Google Scholar
- 7.K. A. Gschneidner, Physical properties and interrelationships of metallic and semimetallic elements, in: “Solid State Physics, Volume 16”, Academic, New York (1954).Google Scholar
- 8.J. D. Achenbach, Generalized continuum models for directionally reinforced solids, Arch. Mech. 28:257 (1976).Google Scholar
- 13.Z. Hashin, Theory of composite materials, in: “Mechanics of Composite Materials”, Pergamon, Oxford (1970).Google Scholar
- 14.R. Hill, Theory of mechanical properties of fibre-strengthened materials — III. Self-consistent model, J. Mech. Phys. Solids: 189 (1965).Google Scholar
- 15.J. J. Hermans, The elastic properties of fiber reinforced materials when the fibers are aligned, Proc. K. Ned. Akad. Wet. B70:1 (1967).Google Scholar