Imperial College London
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DrJianshengXiang

Faculty of Engineering, Department of Earth Science & Engineering

Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 6534j.xiang

 
 
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Location

 

4.90Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Lei:2016:10.1007/s00603-016-1064-3,
author = {Lei, Q and Latham, J-P and Xiang, J},
doi = {10.1007/s00603-016-1064-3},
journal = {Rock Mechanics and Rock Engineering},
pages = {4799--4816},
title = {Implementation of an empirical joint constitutive model into finite-discrete element analysis of the geomechanical behaviour of fractured rocks},
url = {http://dx.doi.org/10.1007/s00603-016-1064-3},
volume = {49},
year = {2016}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - An empirical joint constitutive model (JCM) thatcaptures the rough wall interaction behaviour of individualfractures associated with roughness characteristicsobserved in laboratory experiments is combined with thesolid mechanical model of the finite-discrete elementmethod (FEMDEM). The combined JCM-FEMDEM formulationgives realistic fracture behaviour with respect toshear strength, normal closure, and shear dilatancy andincludes the recognition of fracture length influence as seenin experiments. The validity of the numerical model isdemonstrated by a comparison with the experimentallyestablished empirical solutions. A 2D plane strain geomechanicalsimulation is conducted using an outcrop-basednaturally fractured rock model with far-field stresses loadedin two consecutive phases, i.e. take-up of isotropicstresses and imposition of two deviatoric stress conditions.The modelled behaviour of natural fractures in response tovarious stress conditions illustrates a range of realisticbehaviour including closure, opening, shearing, dilatancy,and new crack propagation. With the increase in stressratio, significant deformation enhancement occurs in thevicinity of fracture tips, intersections, and bends, wherelarge apertures can be generated. The JCM-FEMDEMmodel is also compared with conventional approaches thatneglect the scale dependency of joint properties or theroughness-induced additional frictional resistance. Theresults of this paper have important implications forunderstanding the geomechanical behaviour of fracturedrocks in various engineering activities
AU  - Lei,Q
AU  - Latham,J-P
AU  - Xiang,J
DO  - 10.1007/s00603-016-1064-3
EP  - 4816
PY  - 2016///
SN  - 1434-453X
SP  - 4799
TI  - Implementation of an empirical joint constitutive model into finite-discrete element analysis of the geomechanical behaviour of fractured rocks
T2  - Rock Mechanics and Rock Engineering
UR  - http://dx.doi.org/10.1007/s00603-016-1064-3
UR  - http://hdl.handle.net/10044/1/38526
VL  - 49
ER  -
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