Detection of fiber damage in a graphite epoxy composite using current injection and magnetic field mappingA novel NDE technique is reported for detecting fiber disruptions in graphite-epoxy composites. The technique involves injecting electric current along the graphite fibers of a composite and measuring the resulting magnetic fields. The disruptions in current paths, which occur in areas of fiber damage, are detectable as perturbations in the magnetic field. The experimental setup, the measurements, and the magnetic images of experimental samples are presented. A resistive model has been developed to be used in the modeling of two-dimensional conductivity patterns in graphite composites. Diagrams of the setup and the circuitry are included.
Document ID
19870023486
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Blalock, T. N. (NASA Langley Research Center Hampton, VA, United States)
Yost, W. T. (NASA Langley Research Center Hampton, VA, United States)