DEM for Modeling Cracks Propagation in Rocks under Uniaxial Compression Tests

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The Discrete Element Method (DEM) was used to simulate cracks propagate in rocks subjected to uniaxial compressive stress. A DEM code was developed, and used to simulate the response of the continuum materials to loading. Rock samples with two initial cracks inclined at varying angles were simulated with the DEM code. The results were compared with those obtained from laboratory samples, and it was observed that the two results were consistent. This suggests that the DEM is a robust technique for the visualization of secondary cracks formations and propagations in rocks.

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Advanced Materials Research (Volumes 433-440)

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4788-4793

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January 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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[1] P. Sedsll and D. Polland, Mechanics of discontinous faults, J. Geophys. Res., vol. 85, p.4337– 4350, (1980).

Google Scholar

[2] N. Moës, J. Dolbow and T. Belytschko, A finite element method for crack growth without remeshing, Internat. J. Numer. Methods Engrg., vol. 46, p.131–150, (1999).

DOI: 10.1002/(sici)1097-0207(19990910)46:1<131::aid-nme726>3.0.co;2-j

Google Scholar

[3] P.A. Cundall and ODL Strack, A discrete numerical model for granular assemblies, Geotechnique, vol. 29, p.47–65, (1979).

DOI: 10.1680/geot.1979.29.1.47

Google Scholar

[4] H.P. Zhu, Z.Y. Zhou and R.Y. Yang, Discrete particle simulation of particulate systems: Theoretical developments, Chemical engineering Science, vol. 62, pp.3378-3396, (2007).

DOI: 10.1016/j.ces.2006.12.089

Google Scholar

[5] S.A. Magnier and F.V. Donze, Numerical Simulation of Impacts using a Discrete Element Method, Mechanics of Cohesive-Frictional Materials, vol. 3, pp.257-276, (1998).

DOI: 10.1002/(sici)1099-1484(199807)3:3<257::aid-cfm50>3.0.co;2-z

Google Scholar

[6] M.S. Hossein and G.N. Erfan, A micromechanical study of rolling and sliding contacts in assemblies of oval granules, Int. J. Numer. Anal. Meth. Geomech., vol. 27, p.403–424, (2003).

DOI: 10.1002/nag.278

Google Scholar

[7] F.V. Luis, E.V. Luis and L.G. Sebastian, DEM analysis of the crack propagation in brittle clays under uniaxial compression tests,. International Journal for Numerical and Analytical Methods in Geomechanics, vol. 32, pp.1405-1415, (2008).

DOI: 10.1002/nag.665

Google Scholar

[8] R. Hart, P. Cundall and J. Lemos, Formulation of a three-dimensional distinct element model—part II. mechanical calculations for motion and interaction of a system composed of many polyhedral blocks, International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, vol. 25, p.117–125, (1988).

DOI: 10.1016/0148-9062(88)92294-2

Google Scholar

[9] V. Loup, Computer "Experiments" on Classical Fluids. I. Thermodynamical Properties of Lennard-Jones Molecules, Phys. Rev., vol. 159, p.98 –103, (1967).

DOI: 10.1103/physrev.159.98

Google Scholar

[10] F.A. Tavarez, Discrete Element Method for Modelling Solid and Particulate Materials [D],. Madison: University of Wisconsin-Madison, (2005).

Google Scholar

[11] L. Olovsson, M. Unosson and K. Simonsson, Selective mass scaling for thin walled structures modeled with tri-linear solid elements, Computational Mechanics, vol. 34, pp.134-136, (2004).

DOI: 10.1007/s00466-004-0560-6

Google Scholar

[12] P.Z. Pan, W.X. Ding and X.T. Feng, Research on Influence of Pre-existing Crack Geometrical and Material Properties on Crack Propagation in Rocks, Chinese Journal of Rock Mechanics and Engineering, vol. 27, pp.1882-1889, 2008. (in Chinese).

Google Scholar