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Elaboration of fracture prediction map using 2D digital image correlation - 2D CID

2022; Instituto Brasileiro do Concreto (IBRACON); Volume: 15; Issue: 4 Linguagem: Inglês

10.1590/s1983-41952022000400003

1983-4195

Leandro Silva de Assis, Joaquim Teixeira de Assis, José Renato de Castro Pessôa, Armando Dias Tavares,

3D Surveying and Cultural Heritage

Abstract This work aims to present a methodology for the elaboration of a deformation map in a Portland cement concrete specimen to predict fractures caused by axial compression stresses, using the technique of Digital Image Correlation - DIC 2D. For this purpose, 5 concrete specimens with compressive strength expected at 28 days fck of 40 MPa were analyzed, which were tested in the ABNT NBR 5739/2018 standard - compression test of cylindrical concrete specimens. During the test, the necessary digital images were acquired in the DIC-2D array. These images were subsequently processed, and the results interpreted statistically. According to the result of the correlation of images obtained, it was found that 67% of the specimens had regions of accumulation of stresses that indicated in advance the location of the rupture, which enabled the development of a fracture prediction map. The results obtained in the research showed that the methodology used by means of the DIC-2D arrangement was able to predict the place where the rupture in the specimens occurred.