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ASTM Selected Technical Papers
Damage Detection in Composite Materials
By
JE Masters
JE Masters
1
Staff Engineer
,
Lockheed Engineering and Science Company, NASA Langley Research Center
,
Hampton, VA
;
symposium chairman and editor
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ISBN-10:
0-8031-1474-5
ISBN:
978-0-8031-1474-6
No. of Pages:
287
Publisher:
ASTM International
Publication date:
1992

The growing use of advanced composites in structural applications has intensified the need for nondestructive technologies to locate, identify, and classify defects and flaws in composite structures with increasingly complex geometries. Ultrasonic nondestructive testing methods have proven to be successful and reliable in the inspection and certification of composite structures that are scanned by sophisticated, automated, multiaxis robotic systems. Digitizing of the ultrasonic information has introduced powerful computer graphics image enhancement techniques to aid in the interpretation of the results.

Research results of comparative studies are presented that take advantage of advanced robotic scanning and subsequent image enhancement technologies. A variety of ultrasonically detectable defects such as porosity, contaminations, delaminations, fiberor matrix-rich areas, fiber orientation, and impact damage are interrogated. Flaw growth models for fatigue samples are discussed, addressing the flaw criticality issue, a growing area of interest in the characterization of composite structures.

1.
Steiner
,
K. V.
, “
Image Enhancement Techniques for Ultrasonic NDE Applications
,”
Proceedings of the 10th ASTM Symposium on Composite Materials, Testing and Design
, ASTM STP 1120,
American Society for Testing and Materials
,
Philadelphia
, pp. 330–343.
2.
Blake
,
R. A.
, Jr.
, “
Implementation of a Robotic Manipulator for the Ultrasonic Inspection of Composite Materials
,”
Review of Progress in Quantitative Nondestructive Evaluation
, Vol.
4B
,
Plenum Publishing Co.
,
New York, NY
,
1985
.
3.
Blake
,
R. A.
, Jr.
and
Irwin
,
R. G.
, Jr.
, “
CCMIAP—Image Analysis Program Users Manual
,” CCM Report 87-21,
University of Delaware, Center for Composite Materials
, Newark, DE,
1987
.
4.
Cheremisinoff
,
N. P.
,
Practical Statistics for Engineers and Scientists
,
Technomic Publishing Co.
,
Lancaster, PA
,
1987
.
5.
Weber
,
S. A.
,
Blake
,
R. A.
, Jr.
, and
Irwin
,
R. G.
, Jr.
, “
Ultrasonic Image Reconstruction Utilizing a Full Volume Digitized Waveform Database
,”
Review of Progress in Quantitative Nondestructive Evaluation
, Vol
7A
,
Plenum Publishing Co.
,
New York, NY
,
1988
, pp. 319–324.
6.
Schuster
,
J.
and
Steiner
,
K. V.
, “
Correlations between Ultrasonic Waveforms and Artificially Implanted Defects in Composite Materials
,”
ASTM Journal of Composites Technology and Research
, Vol.
12
, No.
1
, Spring
1990
.
7.
Blake
,
R. A.
, Jr.
, “
Computer Aided Ultrasonic Flaw Growth Characterization in Composite Materials
,”
Review of Progress in Quantitative Nondestructive Evaluation
, Vol.
4B
,
Plenum Publishing Co.
,
New York, NY
,
1985
.
8.
Lindsay
,
T. C.
, “
Designing Composite Structures for Low-Velocity Impact
,” Master's thesis, CCM Report 90-18,
University of Delaware
, Newark, DE,
1990
.
9.
Pettit
,
D. E.
, “
Characterization of Impact Damage in Composite Laminates
,”
Nondestructive Evaluation and Flaw Criticality for Composite Materials
, ASTM STP 696,
Pipes
R. B.
, Ed.,
American Society for Testing and Materials
,
Philadelphia
,
1978
, pp. 101–124.
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