Accession Number : ADA310384

Title :   A Study of the Stress Wave Factor Technique for Evaluation of Composite Materials.

Descriptive Note : Final rept.,

Corporate Author : VIRGINIA POLYTECHNIC INST AND STATE UNIV BLACKSBURG DEPT OF ENGINEERING SCIEN CE AND MECHANICS

Personal Author(s) : Duke, J. C., Jr. ; Henneke, E. G., II ; Kiernan, M. T. ; Grosskopf, P. P.

PDF Url : ADA310384

Report Date : JUN 1989

Pagination or Media Count : 62

Abstract : The 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 has been investigated for a variety of materials including advanced composites, hybrid structure bonds, adhesive, bonds, wood products, and wire rope. The research program reported here 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 can not at present he analyzed satisfactorily with mechanical performance prediction models. In addition to presenting definitive studies on application potentials, this report is meant to serve as a state-of-the-art review of our understanding of the acousto-ultrasonic method as applied to advanced composites.

Descriptors :   *MECHANICAL PROPERTIES, *NONDESTRUCTIVE TESTING, *ULTRASONIC TESTS, INTEGRATED SYSTEMS, STATE OF THE ART, COMPOSITE MATERIALS, FIBER REINFORCED COMPOSITES, LASER APPLICATIONS, ACOUSTIC MEASUREMENT, BONDING, WOOD, STRESS WAVES.

Subject Categories : Test Facilities, Equipment and Methods
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE