Measurement of the thermal radial diffusivity of anisotropic materials by the converging thermal wave technique - Application to NDE : first results in the detection of normal cracks

Abstract : The Converging Thermal Wave (CTW) technique is used for measuring the thermal radial diffusivity of orthotropic materials. In this technique, the surface of the sample is heated on an annular pattern, and the temperature rise at the center of the annulus is recorded. From this temperature-time history, the radial diffusivity is identified using a novel procedure. Application to a carbon-epoxy composite material is presented. The ability of the CTW technique to detect normal cracks to the heated surface of the sample is also demonstrated.
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Contributor : Franck Enguehard <>
Submitted on : Thursday, March 17, 2016 - 4:02:42 PM
Last modification on : Tuesday, March 26, 2019 - 2:24:04 PM

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  • HAL Id : hal-01289866, version 1

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Franck Enguehard, Alain Déom, Daniel Balageas. Measurement of the thermal radial diffusivity of anisotropic materials by the converging thermal wave technique - Application to NDE : first results in the detection of normal cracks. 7th International Topical Meeting on Photoacoustic and Photothermal Phenomena, Aug 1991, Doorwerth, Netherlands. ⟨hal-01289866⟩

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