Use of Digital Image Correlation in Engineering Education: Application in Beams in Shear Resistance

Abstract

Engineering has experienced technological advances in data acquisition, storage, processing, and use. Among the range of technologies, digital image correlation (DIC) stands out as an optical technique that can structurally analyze the surface of an element or part through the processing of digital images. Unlike conventional measurement techniques, DIC is versatile and cost-effective, making it an attractive tool for structural analysis. In this context, this paper aims to describe the use of DIC with the purpose of improving practical solid mechanics classes in engineering education institutions. This choice is justified by DIC’s ability to measure displacements and deformations on surfaces, contributing to a better understanding of the mechanical behavior of materials. As an example, the application of DIC was demonstrated in an experimental study involving steel fiber reinforced concrete (SFRC) beams without transverse reinforcement in order to enable the monitoring of the main diagonal crack, which in turn allows a deeper analysis of the failure of these beams. The robustness of the method is evidenced from the shear-resistant capacity of these beams, calculated with data obtained from the experiment, and also with theoretical data. With specific and experimental data for each beam, the maximum resistance response proved to be more accurate compared to the values obtained by theoretical variables. It was therefore possible to realize that the methodology can provide an immersive experience for students in theoretical and analytical learning about the behavior of structures and materials.

Keywords: Digital Image Correlation (DIC). Engineering. University education.