NASA NTRS · 19830000177
Eddy-Current Damage Test for Carbon Composites
Abstract
Nondestructive test method detects cracks in materials of low conductivity. Test setup includes eddycurrent unit with frequency of 2 to 20 MHz/ and storage oscilloscope. High frequency required to assure depth of penetration less than substrate thickness, to prevent thickness from influencing reading. Eddy-current analysis confirmed by visual inspection as damaged area was sectioned and evaluated.
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Hamilton, A. B.. 1983-10-01. Eddy-Current Damage Test for Carbon Composites. https://ntrs.nasa.gov/citations/19830000177
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