Correlação digital de imagens para medições de deslocamentos em vigas em balanço

Abstract

Digital Image Correlation (DIC) uses digital image processing techniques, giving the field of displacement of an object in regions of interest. The difference between DIC and other a conventional measurement technique is that it allows non-invasive measurement mode and has a low cost benefit. DIC can be applied in civil engineering, mechanical engineering, materials science and biomedical engineering, among others. Thus, it can be used and adapted to many different measurement situations allowing a quickly and accurately processing of a large number of images. This study aims to measure displacements in a cantilever beam by using DIC. A steel beam was subjected to load sat its free and pictures were taken before and after loads application in order to mea sure displacement fields along the beam length via DIC. The work was divided into three stages, the first one was the experimental setup, the second one used Ncorr software for the image processing and the last step was to compare the results obtained from DIC with analytical data. Loads of 0.05 N, 0.1 N, 0.2 N, 0.5 N, 10 N, 20 N and 50N were applied to the beam and results for loads from 10 N were satisfactory when compared to analytical values.