Nondestructive evaluation of the bonding of fiber to matrix in a composite material
- Univ. of Toronto, Ontario (Canada)
One of the important issues in the study of fiber-reinforced composites is the quality of the bonding between the matrix and the fiber. A nondestructive evaluation method based on acoustic wave scattering is investigated in this paper. A two-layered cylinder, consisting of a fiber encased in a cylindrically-shaped matrix, is insonified by a plane acoustic wave. Surface waves are generated on the outer circumference of the matrix, as well as the fiber/matrix interface. These waves then lead to vibrations at resonance frequencies of the system. It will be shown that changes of resonance frequencies can be correlated to the quality of the bond between the matrix and fiber. This effect is studied using a mathematical model that predicts the shifts in resonance frequencies. Experimental studies on steel wires embedded in Epon-815 resin are performed to support the theoretical results.
- OSTI ID:
- 109765
- Report Number(s):
- CONF-950521-; ISBN 1-56676-313-4; TRN: IM9543%%66
- Resource Relation:
- Conference: ENERCOMP 95: international conference on composite materials and energy, Montreal (Canada), 8-10 May 1995; Other Information: PBD: 1995; Related Information: Is Part Of International conference on composite materials and energy: Proceedings. Enercomp 95; PB: 1080 p.
- Country of Publication:
- United States
- Language:
- English
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