Infrared thermography techniques allows us to explores the possibility of detecting geometrical defects in concrete specimens using thermal imaging. The method is based on the characteristics of heat flow phenomenon, in a conductive medium of specific geometry, which is intended to model predetermined boundary conditions. A range of crack widths, representing mechanical damage, has been induced under controlled laboratory conditions. In all cases the cracks have been located successfully. Numerical modelling results, using finite element method, are present. The current analysis is developed as a two-dimensional problem. The numerical model may be used to confirm the experimental results, once material physical and mechanical parameters are available. Experimental data, based on selected shape parameters, show a satisfactory agreement with the numerical results, hence encouraging the scope of the present study to be widened.
What is IR Thermography?
Thermography is a technology that actually allows us to see thermal energy or heat!
Thermographic cameras detect radiation in the infrared range of the electromagnetic spectrum (roughly 900–14,000 nanometers or 0.9–14 µm) and produce images of that radiation. Since infrared radiation is emitted by all objects based on their temperatures, according to the black body radiation law, thermography makes it possible to "see" one's environment with or without visible illumination. The amount of radiation emitted by an object increases with temperature, therefore thermography allows one to see variations in temperature (hence the name). When viewed by thermographic camera, warm objects stand out well against cooler backgrounds.download full report from the link below
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