APPLICATION OF CONTINUUM DAMAGE MECHANICS TO CARBON FIBER-REINFORCED CEMENT COMPOSITES

Cement-based materials in general, and concrete in particular, require reinforcements because of their low tensile strength and strain capacities. The improvement in the strength and energy absorption capacity of the material, because of the addition of randomly oriented and distributed fibers to a cementitious matrix, is usually accompanied by a strong nonlinear behavior of the composite. Therefore, appropriate nonlinear theories are needed to make realistic predictions for structural applications of such materials. Based on the thermodynamics of irreversible processes, and guided by physical observations, damage mechanics has been proven to be a very rational approach when dealing with the nonlinear behavior of engineering materials, especially prior to the phenomenon of localization. The response of three-point bending beams and circular plates subjected to center-point transverse loading has been investigated for two volume fractions of carbon fibers (2% and 3%) and three fiber lengths (3 mm, 6 mm, and 10 mm). It was found that this approach was very suitable for the prediction of the observed behavior for both fiber volume fractions.

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  • English

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Filing Info

  • Accession Number: 00795742
  • Record Type: Publication
  • Contract Numbers: NSF/GER-9023496-02, CMS-9632407, NSC 84-2211-E-009-14
  • Files: TRIS
  • Created Date: Jul 27 2000 12:00AM