Accession Number : ADA300671

Title :   Digital Analysis of Ultrasonic Waves in Composites.

Descriptive Note : Rept. for 31 Jan 77-8 Oct 79,

Corporate Author : DELAWARE UNIV NEWARK CENTER FOR COMPOSITE MATERIALS

Personal Author(s) : Blake, Robert A., Jr

PDF Url : ADA300671

Report Date : MAY 1980

Pagination or Media Count : 89

Abstract : The methodology to nondestructively evaluate, both qualitatively and quantitatively, the characteristics and properties of composite materials is explored. The methods are based on amplitude measurements and frequency decomposition of ultrasonic waveforms.

Descriptors :   *COMPOSITE MATERIALS, *FIBER REINFORCED COMPOSITES, *GRAPHITE EPOXY COMPOSITES, COMPUTER PROGRAMS, SIGNAL PROCESSING, DIGITAL SYSTEMS, NONDESTRUCTIVE TESTING, LAMINATES, THESES, DEFECTS(MATERIALS), ECHOES, FAST FOURIER TRANSFORMS, ACOUSTIC VELOCITY, SPECTRUM ANALYSIS, FREQUENCY DOMAIN, DELAMINATION, ULTRASONIC TESTS, ULTRASONIC FREQUENCIES, OSCILLOSCOPES.

Subject Categories : Laminates and Composite Materials
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE