Journal ArticleDOI
Grain-Based Discrete-Element Modeling Study on the Effects of Cementation on the Mechanical Behavior of Low-Porosity Brittle Rocks
Fuqiang Gao,Hongpu Kang +1 more
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This article is published in International Journal of Geomechanics.The article was published on 2017-09-01. It has received 19 citations till now. The article focuses on the topics: Cementation (geology) & Discrete element method.read more
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Grain based modelling of rocks using the combined finite-discrete element method
TL;DR: In this paper, the authors describe the implementation and advantages of grain based modelling (GBM) in the combined finite-discrete element method (FDEM) to study the mechanical behaviour of crystalline rocks.
Journal ArticleDOI
Novel grain-based model for simulation of brittle failure of Alxa porphyritic granite
TL;DR: In this paper, a grain-based model (nGBM) in two-dimensional Particle Flow Code 5.0 was proposed to emulate the brittle failure of crystalline rock, which can well reproduce the realistic failure process of granitic rocks under different loading conditions.
Journal ArticleDOI
Mesoscopic time-dependent behavior of rocks based on three-dimensional discrete element grain-based model
TL;DR: In this article, a three-dimensional discrete element grain-based stress corrosion model incorporating the theories of subcritical crack growth and chemical reaction rate was built to explore the time-dependent behavior of damage evolution and fracture patterns of brittle rocks on a mesoscopic scale.
Journal ArticleDOI
Mesoscopic Damage and Fracturing of Heterogeneous Brittle Rocks Based on Three-dimensional Polycrystalline Discrete Element Method
Tao Xu,Tao Xu,Teng-Fei Fu,Teng-Fei Fu,Michael J. Heap,Philip G. Meredith,Thomas M. Mitchell,Patrick Baud +7 more
TL;DR: In this article, the authors used the 3DEC numerical modeling code to study the fracture patterns, mechanical behavior and strength of granular rocks using an assemblage of Voronoi polyhedra designed to resemble grains.
Journal ArticleDOI
Flat-joint model to reproduce the mechanical behaviour of intact rocks
TL;DR: The mechanical behavior of intact rock materials is controlled by properties of grains and cementation (bonding) between grains in the particle flow code (PFC), three main bonding approaches.
References
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Journal ArticleDOI
A bonded-particle model for rock
D.O. Potyondy,Peter Cundall +1 more
TL;DR: In this paper, a numerical model for rock is proposed in which the rock is represented by a dense packing of non-uniform-sized circular or spherical particles that are bonded together at their contact points and whose mechanical behavior is simulated by the distinct element method using the two-and three-dimensional discontinuum programs PFC2D and PFC3D.
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The progressive fracture of Lac du Bonnet granite
C.D. Martin,N.A. Chandler +1 more
TL;DR: The strength of intact rock is made up of two components: the intrinsic strength, or cohesion; and the frictional strength as discussed by the authors, and it is generally assumed that cohesion and friction are mobilized at the same displacements such that both components can be relied on simultaneously.
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Generalized crack initiation and crack damage stress thresholds of brittle rock masses near underground excavations
TL;DR: In this paper, generalized crack initiation and crack damage thresholds of rock masses are proposed, where the crack initiation threshold is defined by σ1−σ3=A σcm and the crack damage threshold is determined by π 1−σ 3=B σ cm for jointed rock masses, where B is the uniaxial compressive strength of the rock masses and A is the material constant.
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Identifying crack initiation and propagation thresholds in brittle rock
TL;DR: In this article, it was shown that high compressive stresses near the tunnel face significantly contribute to the tunnel tunnel collapse and that the tunnel's tunnel face can be damaged due to the compressive stress.
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Damage initiation and propagation in hard rock during tunnelling and the influence of near-face stress rotation
TL;DR: In this paper, the authors describe the mechanisms that lead to in situ strength drop, from the upper bound defined by crack interaction and the lower bound limited by crack initiation, including the influence of tunnel-induced stress rotation on crack propagation, interaction and ultimately coalescence and failure.