Quantitative Electromagnetic Modeling and NDE of Carbon-Carbon Composites

Abstract

Presented here are eddy-current inspection and modeling techniques for carbon-carbon and other advanced composites. These experiments give much insight into the conductivity characteristics of many materials, and thereby allow one to adequately interpret many of the experimental data from samples. For example, it was shown that under some conditions, carbon-carbon material can behave as though it is an homogeneous bulk conductor (modeled like a metal), while under similar conditions, a sample of graphite-epoxy must be modeled in a much more complicated fashion. This observation leads to many implications about inspection techniques that are applicable for detection of structure, flaws, and conductivity.