Accession Number : ADD013936

Title :   Method of Eddy Current Defect Depth Measurements.

Descriptive Note : Patent Application, Filed 9 Jan 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Vernon, Susan N ; Gammell, Paul M

Report Date : 09 Jan 1989

Pagination or Media Count : 23

Abstract : This Patent application discloses to a method for nondestructive inspection (NDI) of composite materials comprising conductive fibers. The depth of broken fiber damage in nonmetal matrix composites such as graphite/epoxy and carbon/carbon materials may be ascertained and eddy current inspection is extended to include thick metal sections by this method. Inspection is possible with access limited to a single surface. (JHD)

Descriptors :   *EDDY CURRENTS, *INSPECTION, *PATENT APPLICATIONS, *FIBER REINFORCED COMPOSITES, COMPOSITE MATERIALS, CONDUCTIVITY, DAMAGE, FIBERS, MATRIX MATERIALS, METALS, NONDESTRUCTIVE TESTING, NONMETALS, SURFACES, THICKNESS, CARBON CARBON COMPOSITES, EPOXY COMPOSITES, CARBON FIBERS, GRAPHITE

Subject Categories : Mfg & Industrial Eng & Control of Product Sys
      Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE