Accession Number : ADA189823

Title :   Eddy Current Nondestructive Inspection of Graphite Epoxy Using Ferrite Cup Core Probes.

Descriptive Note : Final rept.,

Corporate Author : NAVAL SURFACE WARFARE CENTER SILVER SPRING MD

Personal Author(s) : Vernon, Susan N

PDF Url : ADA189823

Report Date : Sep 1987

Pagination or Media Count : 70

Abstract : This report summarizes the results of a three year project to develop the eddy current technical base for the detection and measurement of broken fiber damage in graphite epoxy using eddy current. Since graphite epoxy components are frequently made of panels having only one accessible surface, a single sided technique using a probe coil was required. Parameters of ferrite pot core probes which affect the defect sensitivity of the probe were identified and evaluated in terms of the coil efficiency factor or coupling coefficient. As a result of this investigation, it is possible to optimize eddy current probes for the single sided inspection of graphite epoxy and other high resistivity materials.

Descriptors :   *INSPECTION, *NONDESTRUCTIVE TESTING, *EPOXY COMPOSITES, *GRAPHITED MATERIALS, COEFFICIENTS, COILS, COUPLING(INTERACTION), DAMAGE, DEFECTS(MATERIALS), DETECTION, EDDY CURRENTS, EFFICIENCY, GRAPHITE, PROBES, SENSITIVITY, CARBON FIBERS, FERRITES

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE