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Prediction of Damage in Randomly Oriented Short-Fibre Composites by Means of a Mechanistic Approach

  • Ba Nghiep Nguyen
  • Mohammad A. Khaleel
Conference paper
Part of the Solid Mechanics and Its Applications book series (SMIA, volume 114)

Abstract

A micro-macro mechanistic approach to damage in short-fibre composites is developed in this paper. At the micro-scale, the damage mechanisms such as matrix cracking and fibre/matrix debonding are analysed to define the associated damage variables. The stiffness reduction law dependent on these variables is then established using micromechanical models and average orientation distributions of fibres and microcracks. The macroscopic response is obtained by means of thermodynamics of continuous media, continuum damage mechanics and a finite element formulation.

Key words

Short-fibre composites matrix cracking fibre/matrix debonding mechanistic approach 

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References

  1. Chou, T.-W., Nomura, S., Taya, M., 1980. A self-consistent approach to the elastic stiffness of short-fiber composites. J. Comp. Mater., 14, 178–188.CrossRefGoogle Scholar
  2. Karcir, L., Narkis, M., Ishai, O., 1975. Oriented short glass-fiber composites: I Preparation and statistical analysis of aligned fiber materials. Polym. Engn. Sci., 15, 525–531.CrossRefGoogle Scholar
  3. Laws, N., Dvorak, G.J., Hejazi, M., 1983. Stiffness changes in unidirectional composites caused by crack systems. Mech. Mater., 2, 123–137.CrossRefGoogle Scholar
  4. Meraghni, F., Benzeggagh, M.L., 1995. Micromechanical modeling of matrix degradation in randomly oriented discontinuous-fibre composites. Comp. Sci. & Tech., 55, 171–186.CrossRefGoogle Scholar
  5. Nguyen, B.N., Ahn, B.K., Khaleel, M.A., 2002. Continuum damage modeling of short-fiber composites subject to matrix cracking. In: Chang F.K., editor. Proceedings of the 10th US-Japan Conference on Composite Materials, Destech Publications, 531–540.Google Scholar
  6. Nguyen, B.N., Khaleel, M.A., 2003. A mechanistic approach to damage in short-fiber composites based on micromechanical and continuum damage mechanics descriptions (Submitted).Google Scholar
  7. Qu, J., 1993. The effect of slightly weakened interfaces on the overall elastic properties of composite materials. Mech. Mater., 14, 269–281.CrossRefGoogle Scholar
  8. Renard J., Favre J.-P., Jeggy T., 1993. Influence of transverse cracking on ply behavior: Introduction of a characteristic damage variable. Comp. Sci. & Tech., 46, 29–37.CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2004

Authors and Affiliations

  • Ba Nghiep Nguyen
    • 1
  • Mohammad A. Khaleel
    • 1
  1. 1.Pacific Northwest National LaboratoryRichlandUSA

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