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Authors
Advisor(s)
Abstract(s)
The Brazilian test is a straightforward method of indirect testing that
consists of applying a diametrically opposite load to a circular disk to determine the
tensile strength of brittle materials, namely rock, concrete, and rock-like material.
The indirect tensile strength is commonly determined by assuming that failure takes
place at the location of the highest tensile stress, specifically at the center of the disk.
However, prior studies have indicated that failure can happen outside the central
region of the test disk when subjected to small angles of loading contact area for
materials with low compression-tension ratios. So, to evaluate and visualize what
happens during the test on the disk, we carried out an optical experimental test called
Moiré interferometry, which can allow a field measurement of displacement and
strain. To complete the study was implemented numerical simulations with the same
conditions of the experimental work. It is safe to say that the interferometric Moiré
technique works well for measuring the displacement field in this kind of test. This
is held by the numerical simulation results.
Description
Keywords
Brazilian disk Moiré interferometry Optical methods Experimental mechanics Numerical simulations Finite element method (FEM)
Pedagogical Context
Citation
Ribeiro, J.E., Rocha, J. (2024). Experimental and Numerical Determination of Strain and Displacement Fields on Brazilian Disk. In: Silva, L.F. da (Ed.) Materials Design and Applications V. Cham: Springer Nature. p. 153-162. ISBN 978-3-031-73905-7.
Publisher
Springer Nature