a new thermal contrast for non-destructive thermographic testing of materials
infrared thermography thermal contrast non-destructive testing thermal quadrupoles
Main Article Content
It is known that methods of thermographic non destructive testing (TNDT) based on thermal contrast are strongly affected by non-uniform heating at the surface. Hence, the results obtained from these methods considerably depend on the chosen reference point. The differential absolute contrast (DAC) method was developed to eliminate the need of determining a reference point that defines the thermal contrast with respect to an ideal (sound) area. Although DAC is very useful at early times, the DAC accuracy decreases at later times when the heat front approaches the sample rear face. In this article, a new DAC version is proposed by explicitly introducing the sample thickness and using the thermal quadrupoles theory. It is shown that the validity of the new DAC version increases for long times while being preserved at short times.
1.
Benítez HD, Ibarra Castanedo C, Bendada A, Maldague X, Loaiza H, Caicedo E. a new thermal contrast for non-destructive thermographic testing of materials. inycomp [Internet]. 2007 Jan. 8 [cited 2024 Nov. 22];9(1):31-44. Available from: https://revistaingenieria.univalle.edu.co/index.php/ingenieria_y_competitividad/article/view/2493
- Sandra E. Nope, Eduardo Caicedo, Humberto Loaiza, Applications of motion and its biological representation in recognition of gestures , Ingeniería y Competitividad: Vol. 8 No. 2 (2006)
- Alexander Arias Cuéllar, Joao L. Ealo Cuello, Eduardo Caicedo, desing,assembling,and calibration of a photogoniometer for the colombian luminaries manufacturer roy alpha,inc , Ingeniería y Competitividad: Vol. 9 No. 1 (2007)
Authors grant the journal and Universidad del Valle the economic rights over accepted manuscripts, but may make any reuse they deem appropriate for professional, educational, academic or scientific reasons, in accordance with the terms of the license granted by the journal to all its articles.
Articles will be published under the Creative Commons 4.0 BY-NC-SA licence (Attribution-NonCommercial-ShareAlike).