Author(s)

S.L. Bai, G.K. Hu, V. Djafari, M. Andreani & D. Frangois

Abstract

The fiber/matrix interfacial stress on and beneath the surface of long-fiber-reinforced composites S.L. Bai," G.K. Hu,°'* V. Djafari," M. Andreani," D. Frangois" " Lab. MSS/MAT, CNRS URA 850, Ecole Centrale de Paris, Grande voie des vignes, 92295 F-Chatenay-Malabry, France * Department of Applied Mechanics, Beijing Institute of Technology, 100081 Beijing, China ABSTRACT The numerical and analytical calculation of the fiber/matrix interfacial stress was carried out for a long-fiber-reinforced composite. By using the plane stress and plane strain conditions, the interfacial shear stress distribution was studied on the surface and in the interior of a tensile specimen. It was found that the interfacial shear stress increases with the fiber aspect ratio and decreases with the fiber volume fraction. For small fiber volume fraction, the interfacial debonding will occur preferentially inside the composite. For large fiber volume fraction, th

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