NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Lamb Wave Assessment of Fiber Volume Fraction in CompositesAmong 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.
Document ID
19990027950
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Seale, Michael D. (College of William and Mary Williamsburg, VA United States)
Smith, Barry T. (Norfolk Academy Norfolk, VA United States)
Prosser, W. H. (NASA Langley Research Center Hampton, VA United States)
Zalameda, Joseph N. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 19, 2013
Publication Date
September 1, 1998
Publication Information
Publication: Journal of Acoustical Society of America
Volume: 104
Issue: 3, Pt. 1
ISSN: 0001-4966
Subject Category
Composite Materials
Distribution Limits
Public
Copyright
Other