N A Abd El-Malak
Articles written in Bulletin of Materials Science
Volume 20 Issue 7 October 1997 pp 981-990
Majority of composite materials used in industry consist of polyester as a matrix and fibre glass as a reinforcement material. Five samples with different fibre glass contents were studied ultrasonically, using pulse echo technique to determine their ultrasonic properties. Results showed that the ultrasonic velocity, elastic moduli and activation energies associated with their relaxation process increase with the increase of the fibre glass content. The study showed the utility of using these inexpensive materials as sound absorbing devices and as backing materials in the manufacture of ultrasonic transducers.
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