Thermal image for monitoring crack forming process

Tetiana Venkel; Jung-Young Son; Jung Kim; Hyoung Lee; Gwanghee Heo

doi:10.1117/12.2615339

20 December 2021 Thermal image for monitoring crack forming process

Tetiana Venkel, Jung-Young Son, Jung Kim, Hyoung Lee, Gwanghee Heo

Proceedings Volume 12126, Fifteenth International Conference on Correlation Optics; 121260G (2021) https://doi.org/10.1117/12.2615339
Event: Fifteenth International Conference on Correlation Optics, 2021, Chernivtsi, Ukraine

Abstract

Thermal image is used to visualize the crack forming and progressing process in mortar prisms added with carbon fibers of five different percentages of 0.0 %, 0.5 %, 1.0 %, 1.5 % and 2.0% in volume, with the time variations of the surface temperature of the prisms while applying forces through a universal testing machine. The surface temperatures are smoothly increasing as the force increases but they reveal sudden temperature increases at the time of crack forming in the prisms. It turns that the sudden temperature increase in the prisms is appeared at the aggregated carbon fibers along the crack paths. The time of increasing matches closely to the crack on-set time determined by a panchromatic camera. Since the fibers along the crack path are more stressed for the given force because they resist more to the force than the mortar itself, their temperatures increase much more than the neighboring mortar. Hence the temperature variation in the aggregated fibers along the crack path informs before the actual crack appearance.

Citation Download Citation

Tetiana Venkel, Jung-Young Son, Jung Kim, Hyoung Lee, and Gwanghee Heo "Thermal image for monitoring crack forming process", Proc. SPIE 12126, Fifteenth International Conference on Correlation Optics, 121260G (20 December 2021); https://doi.org/10.1117/12.2615339

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