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|Title:||Joint elasticity effect on the failure behaviours of rock masses using a discrete element model|
|Citation:||Energies, 2018; 11(11):2968-1-2968-14|
|Yong Yuan, Changtai Zhou, Zhihe Wang and Jifang Du|
|Abstract:||It is widely accepted that the mechanical properties and failure behaviours of a rock mass are largely dependent upon the geometrical and mechanical properties of discontinuities. The effect of joint elasticity on the failure behaviours of rock masses is investigated using a discrete element model, namely, the synthetic rock mass model. Here, uniaxial compression tests of the numerical model are carried out for the rock mass model with a persistent joint to analyse the role of joint elasticity in the failure process with various joint orientations, β. A strong correlation between the joint elasticity and failure strength is found from the simulation results: a positive relationship when the joint orientation β<φj; a negative relationship when the joint orientation φj<β<90∘ ; and a very limited effect when the joint orientation β=90∘ . Additionally, it is shown that the joint elasticity is the governing factor in the transition of failure modes, especially from the sliding failure mode along the joint to the mixed sliding-tensile failure mode.|
|Keywords:||Anisotropy; discrete element model; joint stiffness; Jaeger’s criterion|
|Rights:||© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).|
|Appears in Collections:||Civil and Environmental Engineering publications|
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