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AuthorAntony S.J.
AuthorOlugbenga A.
AuthorOzerkan N.G.
Available date2020-02-05T08:53:06Z
Publication Date2018
Publication NameRock Mechanics and Rock Engineering
ResourceScopus
ISSN7232632
URIhttp://dx.doi.org/10.1007/s00603-017-1347-3
URIhttp://hdl.handle.net/10576/12709
AbstractWe present a hybrid framework for simulating the strength and dilation characteristics of sandstone. Where possible, the grain-scale properties of sandstone are evaluated experimentally in detail. Also, using photo-stress analysis, we sense the deviator stress (/strain) distribution at the micro-scale and its components along the orthogonal directions on the surface of a V-notch sandstone sample under mechanical loading. Based on this measurement and applying a grain-scale model, the optical anisotropy index K0 is inferred at the grain scale. This correlated well with the grain contact stiffness ratio K evaluated using ultrasound sensors independently. Thereafter, in addition to other experimentally characterised structural and grain-scale properties of sandstone, K is fed as an input into the discrete element modelling of fracture strength and dilation of the sandstone samples. Physical bulk-scale experiments are also conducted to evaluate the load-displacement relation, dilation and bulk fracture strength characteristics of sandstone samples under compression and shear. A good level of agreement is obtained between the results of the simulations and experiments. The current generic framework could be applied to understand the internal and bulk mechanical properties of such complex opaque and heterogeneous materials more realistically in future. 2017, Springer-Verlag GmbH Austria.
SponsorGrant # 6-1010-2-413 from the Qatar National Research Fund (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. AO wishes to thank PTDF, Nigeria for supplying some of the sandstone samples.
Languageen
PublisherSpringer-Verlag Wien
SubjectDEM
Mechanical properties
Micro-mechanics
Optical stress analysis
Rock mechanics
TitleSensing, Measuring and Modelling the Mechanical Properties of Sandstone
TypeArticle
Pagination451-464
Issue Number2
Volume Number51
dc.accessType Abstract Only


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