Hostname: page-component-7b7567c8c-fvjsw Total loading time: 0 Render date: 2026-11-15T02:33:59.019Z Has data issue: false hasContentIssue false
  • English
  • Français

Material constants of filamentary-composite laminates

Published online by Cambridge University Press:  04 July 2016

S. A. Zaghloul and
J. B. Kennedy
S. A. Zaghloul
Affiliation:
Computer Centre, University of Windsor, Canada
J. B. Kennedy
Affiliation:
Department of Civil Engineering, University of Windsor, Canada
Get accessRights & Permissions [Opens in a new window]

Extract

The basic building block of a filamentary-composite laminate is a ply or a lamina consisting of a larger number of stiff filaments (e.g. glass) embedded in a compatible material (e.g. epoxy). The laminate or multi-directional composite is considered to comprise a number of perfectly bonded laminas with different fibre orientations. The deformation response of a laminate to an applied force is calculated by means of its material constants. One of the common methods of determining these constants is by means of a micro-macro mechanical analysis in which the characteristics of the composite are found in terms of the constituent material properties, geometry, and volume percentage of fibre content. Numerous papers have been published to investigate the micro-macro mechanical approach. Some of these works are based on the mechanics of materials approach and on the variational principle of minimum potential energy, as well as on the classical theory of elasticity.

Information

Type
Technical notes
Information
The Aeronautical Journal , Volume 78 , Issue 766 , October 1974, pp. 464 - 467
Copyright
Copyright © Royal Aeronautical Society 1974 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

Footnotes

*Formerly Research Assistant, Department of Civil Engineering, University of Windsor, Canada.

References

1. Paul, B. Prediction of elastic constants of multiphase materials. AIME, Trans. Met. Soc, Vol 218, p 36, February 1960.Google Scholar
2. Tsai, S. W. Structural behavior of composite materials. NASA Report No CR-71, p 42, 1964.Google Scholar
3. Whitney, J. M. and Riley, M. B. Elastic properties of fiber reinforced composite materials. AIAA Journal, Vol 4, No 9, p 1537, September 1966.Google Scholar
4. Novak, R. C. and Bert, C. W. Theoretical and experimental bases for more precise elastic properties of epoxy. Journal of Composite Materials, Vol 2, No 4, p 505, October 1968.Google Scholar
5. Lekhnitskii, S. G. Theory of elasticity of an anisotropic elastic body. Holden-Day, San Francisco, 1963.Google Scholar
6. Whitney, J. M. Experimental determination of shear modulus of laminated fiber-reinforced composites. Experimental Mechanics, p 447, October 1967.Google Scholar
7. Greszczuk, L. B. Effect of material orthotropy on the directions of principal stresses and strains. ASTM-STP405, 1966.Google Scholar
8. Ashton, J. E. Approximate solutions for unsymmetrically laminated plates. Journal of Composite Materials, Vol 3, No 1, p 189, January 1969.Google Scholar