Paper number 330
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UNIFICATION OF FIBRE/ MATRIX INTERFACIAL MEASUREMENTS WITH LASER RAMAN MICROSCOPY |
Costas Galiotis1,2, Alkis Paipetis2 and Christian Marston3
1Institute of Chemical Engineering and High Temperature Processes, Foundation for Research & Technology-Hellas, Stadiou Street, Platani, P.O.Box 1414, GR-265 00, Patras, Greece.
2Department of Materials, Queen Mary & Westfield College, Mile End Road, London E1 4NS, UK
3Centre for Composite Materials, VHE 602 M/C 0241, University of Southern California,
Los Angeles, California, CA 900891450, USA.
| Summary | The effect of specimen geometry upon the parameters that govern the stress transfer (transfer length, interfacial shear strength, positively affected length and stress concentration factor) in a carbon fibre/ epoxy composite was examined in detail. Five frequently employed composite geometries were considered: single fibre composite coupons incorporating discontinuous and continuous carbon fibres, multi-fibre composite tapes with a controlled inter-fibre separation, four-ply unidirectional coupons, and, finally, impregnated fibre tows. The chemistry and the curing characteristics of the matrix were kept unaltered regardless of specimen geometry. All fibre stress measurements were conducted by means of laser Raman microscopy. |
Keywords | interface, carbon fibre, epoxy resin, Raman spectroscopy. |