Accession Number : AD0679573
Title : NONDESTRUCTIVE TESTING FOR VOID CONTENT IN GLASS-FILAMENT-WOUND COMPOSITES.
Descriptive Note : Final rept.,
Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C
Personal Author(s) : Walker,B. E. , Jr. ; Ewing,C. T. ; Miller,R. R.
Report Date : 04 OCT 1968
Pagination or Media Count : 19
Abstract : Precise nondestructive methods for void determinations on glass-filament-wound composites in the form of rings and ring segments were tested for feasibility, with particular emphasis on the 0- to 3-volume-% void region. Experimental data related to void content are presented for several possibilities - infrared transmission, backscatter from laser transmission, density measurements, and corona discharge inception. The problems associated with these methods are discussed, and the feasibility of a nondestructive test method for void determinations on rings is demonstrated in comparison with destructive void results. (Author)
Descriptors : (*COMPOSITE MATERIALS, *NONDESTRUCTIVE TESTING), (*FILAMENT WOUND CONSTRUCTION, NONDESTRUCTIVE TESTING), FEASIBILITY STUDIES, GLASS TEXTILES, EPOXY RESINS, MATHEMATICAL MODELS, DEFECTS(MATERIALS), DENSITY, BETA PARTICLES, BACKSCATTERING, DIELECTRIC PROPERTIES, INFRARED TRANSMITTERS, LASERS, MICROWAVES, ELECTRICAL CORONA, MIXTURES
Subject Categories : Refractory Fibers
Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE