Lamb wave assessment of fiber volume fraction in composites.
Among the various techniques available, ultrasonic Lamb waves offer a convenient method of examining composite materials. Since the Lamb wave velocity depends on the elastic properties of a material, an effective tool exists to evaluate composites by measuring the velocity of these waves. Lamb waves can propagate over long distances and are sensitive to the desired in-plane elastic properties of the material. This paper discusses a study in which Lamb waves were used to examine fiber volume fraction variations of approximately 0.40-0.70 in composites. The Lamb wave measurements were compared to fiber volume fractions obtained from acid digestion tests. Additionally, a model to predict the fiber volume fraction from Lamb wave velocity values was evaluated.
Seale
M D
MD
Department of Physics, College of William and Mary, Williamsburg, Virginia 23187, USA.
Smith
B T
BT
Prosser
W H
WH
Zalameda
J N
JN
D008962:Models, Theoretical; D013997:Time Factors; D014465:Ultrasonics