NDTnet 1998 Aug, Vol.3 No.8

Abstract

The fatigue behaviour of carbon fibre reinforced materials is complex in a way that different damage modes can develop during fatigue loading. These damage modes grow, introduce new damage modes and interact with the existing damage leading to an early degradation in the mechanical properties of the composite such as stiffness and strength and finally in the fracture of the composite material.

The research work presented in this paper focuses on the assessment of matrix cracks and delamination with the acoustic emission technique. The cumulative AE counts of the AE signals have been used and, after appropriate filtering, gave a direct correlation with the real fatigue damage. The AE information was therefore used to quantify the amount of damage and to correlate it with the stiffness reduction of the laminates. Finally an experimentalnumerical model for the tension-tension fatigue behaviour of quasi-isotropic C-epoxy laminates is presented as well as a scheme to predict the critical fatigue state.

Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00

Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:

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