engleski

A numerical approach for hidden defects in thermal non-destructive testing

The application of IR thermography for detecting defects under surface as well as for the estimation of corrosion intensity seems to have a good perspective as a non destructive method. Beside the limitations which are the results of the IR camera itself and thermal properties of the material detected, IR thermography produces acceptable results when combined with an adequate numerical method. A numerical simulation of heat transport enables a separate analysis of relevant parameters which characterize heat dissipation in material, like intensity and duration of heat stimulation, properties of the material and start conditions, as well as the time distribution of certain parameters. The comparison of numerical simulation and thermographic measurements presented in reference [5] shows a very good correspondence in results. The importance of determining the moment when the contrast reaches its maximum can be clearly seen from numerical analysis. The analysis also shows that a relative material loss and the diameter of defect can be estimated with best accuracy at the moment when the current contrast reaches the maximum.

thermal non-destructive testing ; thermography ; control volume method ; hidden defects

Časopis je indeksiran i u bazama: International Aerospace Abstracts ; Materials Business File ; ProQuest ; ReferativnInternational Aerospace Abstracts ; yi Zhurnal ; SJR ; SNIP ; Solid State and Superconductivity Abstracts ; TEMA ; Ulrich’s Periodicals Directory.