SYMPOSIA PAPER Published: 01 January 1993
STP24728S

Evaluation of Impact Damage in Composite Materials Using Acoustic Emission

Source

The Defence Research Establishment, Valcatier (DREV) has been studying the application of composite materials for use in a lightweight anti-tank recoilless gun. Since thermoset resins are very sensitive to impact, it is important to determine the severity of damage using a nondestructive technique in order to establish the serviceability of the tube.

Acoustic emission (AE) was identified as a very promising method to measure the level of damage accumulation due to low-velocity impact, and a study was undertaken. The experimental program consisted of impacting 28 of 36 tubes with energies varying from 3 to 18 J. These tubes, fabricated by a wet winding process using carbon fiber/epoxy resin, were 25.4 cm long, and had a 9-cm internal diameter and a 3.6-mm wall thickness. The winding angle was ±71°. The AE was measured while pressurizing these tubes to rupture. Results indicate the potential of acoustic emission as a means of estimating the serviceability of a composite tube.

Author Information

Bolduc, M
Defence Research Establishment Valcartier, Courcelette, Quebec, Canada
Roy, C
Sherbrooke University, Sherbrooke, Quebec
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Details
Developed by Committee: D30
Pages: 127–138
DOI: 10.1520/STP24728S
ISBN-EB: 978-0-8031-5222-9
ISBN-13: 978-0-8031-1498-2