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A study of the stress wave factor technique for evaluation of composite materialsThe acousto-ultrasonic approach for nondestructive evaluation provides a measurement procedure for quantifying the integrated effect of globally distributed damage characteristic of fiber reinforced composite materials. The evaluation procedure provides a stress wave factor that correlates closely with several material performance parameters. The procedure was investigated for a variety of materials including advanced composites, hybrid structure bonds, adhesive bonds, wood products, and wire rope. The research program focused primarily on development of fundamental understanding and applications advancements of acousto-ultrasonics for materials characterization. This involves characterization of materials for which detection, location, and identification of imperfections cannot at present be analyzed satisfactorily with mechanical performance prediction models. In addition to presenting definitive studies on application potentials, the understanding of the acousto-ultrasonic method as applied to advanced composites is reviewed.
Document ID
19890011885
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Duke, J. C., Jr. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Henneke, E. G., II (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Kiernan, M. T. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Grosskopf, P. P. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1989
Publication Information
Publisher: NASA
Subject Category
Quality Assurance And Reliability
Report/Patent Number
NASA-CR-4195
NAS 1.26:4195
E-4385
Accession Number
89N21256
Funding Number(s)
CONTRACT_GRANT: NAG3-172
PROJECT: RTOP 505-90-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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