Mechanical Characterization of Granite Rock Materials: On the Influence from Pre-Existing Defects

The length, orientation, and population of pre-existing cracks play an important role in the mechanical response of quasi-brittle materials, such as granite. Specifically, Bohus granite rock is at issue in the present investigation. The aims of this study are (1) to demonstrate the existence and cha...

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Bibliographic Details
Published in:Journal of testing and evaluation 2018-03, Vol.46 (2), p.540-548
Main Authors: Jelagin, D., Saadati, M., Jerjen, I., Larsson, P.-L.
Format: Article
Language:English
Subjects:
finite-element simulations
granite
mechanical characterization
pre-existing defects
three-point bending
X-ray computed tomography
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Summary:The length, orientation, and population of pre-existing cracks play an important role in the mechanical response of quasi-brittle materials, such as granite. Specifically, Bohus granite rock is at issue in the present investigation. The aims of this study are (1) to demonstrate the existence and characteristics of pre-existing defects (cracks) in granite rock specimens, and (2) to determine the influence from these defects at characterization of such materials. In doing so, X-ray tomography was the method used to visualize the cracking of three-point bending specimens in the context of pre-existing defects. It was also the intention to relate the experimentally determined effect of these cracks at three-point bending testing with corresponding results from numerical methods and specifically finite-element calculations. In the latter case, the location of these cracks was of primary interest and it was shown that this feature can be of considerable importance at material characterization.
ISSN:0090-3973
1945-7553
1945-7553
DOI:10.1520/JTE20160304