G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 3/00 (2006.01) G01N 25/72 (2006.01)
Patent
CA 2735337
Material testing under variable heat and load while continuously monitoring crack formation is provided using an apparatus that permits thermal control somewhat uniformly over a conductive sample, while permitting a controlled load to be applied to the sample in tensional or flexural modes. Thermographic imaging of a sample in situ within a standard thermo-mechanical fatigue (TMF) test rig or other heat and load test apparatus is used to detect and monitor cracks as they form. A 360° sample view is possible. Image analysis software may identify, count and/or characterize cracks. Thermographic images may be analyzed to determine a sample temperature, e.g. for temperature feedback control. Essentially passive thermography is used with an inductive heating coil that surrounds at least 60% of a length of the sample, with at least two windings, the windings having thickness and pitch so that at least half the sample is in view.
Dudzinski David
Genest Marc
Davis Jason E. J.
National Research Council Of Canada
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