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The distribution of residual thermal strains and the mechanical response of carbon fibre thermoplastic composites, upon the application of an external tensile stress, have been studied. Confocal laser Raman microscopy has been employed to monitor the Raman wavenumbers of the embedded carbon fibres, within a predefined window of observation. The application of a tensile stress field on the P75/poly-ether-ether ketone (PEEK) composite, induces an internal fibre stress/strain gradient due to progressive fibre fracture and matrix microcracking. In cases where optical monitoring of discontinuities, such as fibre and matrix breaks, is not possible, a statistical approach is pursued for monitoring the micromechanics of failure in these composites.

Additional information

Authors: FILIOU C, JRC Petten (NL);GALIOTIS C, JRC Petten (NL)
Bibliographic Reference: Article: Computer Science and Technology (1998)
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