Abstract
Shear deformation of granular media leads to continual restructuring of particle contact network and mechanical interactions. These changes to the mechanical state include jamming of grains, collisions, and frictional slip of particles—all of which present abrupt perturbations of internal forces and release of strain energy. Such energy release events typically result in the generation of elastic waves in the kHz frequency range, termed acoustic emissions (AE). The close association between grain-scale mechanics and AE generation motivated the use of AE as surrogate observations to assess the mechanical state of complex materials and granular flows. The study characterizes AE generation mechanisms stemming from grain-scale mechanical interactions. Basic mechanisms are considered, including frictional slip between particles, and mechanical excitation of particle configurations during force network restructuring events. The intrinsic frequencies and energy content of generated AEs bear the signature of source mechanisms and of structural features of the grain network. Acoustic measurements in simple shear experiments of glass beads reveal distinct characteristics of AE associated with different source mechanisms. These findings offer new capabilities for non-invasive interrogation of micromechancial interactions and linkage to a stochastic model of shear zone mechanics. Certain statistical features of restructuring events and associated energy release during shearing were predicted with a conceptual fiber-bundle model (FBM). In the FBM the collective behavior of a large number of basic mechanical elements (representing e.g. grain contacts), termed fibers, reproduces the reaction of disordered materials to progressive loading. The failure of fibers at an individual threshold force corresponds to slipping of a particle contact or a single rearrangement event of the granular network. The energy release from model fiber breakage is the equivalent to elastic energy from abrupt grain rearrangement events and provides an estimate of the energy available for elastic wave generation. The coupled FBM–AE model was in reasonable agreement with direct shear experiments that were performed on large granular assemblies. The results underline the potential of using AE as a diagnostic tool to study micro-mechanical interactions, shear failure and mobilization in granular material.
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References
Vardoulakis, I.: Shear band inclination and shear modulus of sand in biaxial tests. Int. J. Numer. Anal. Methods 4(2), 103–119 (1980)
Oda, M., Kazama, H.: Microstructure of shear bands and its relation to the mechanisms of dilatancy and failure of dense granular soils. Geotechnique 48(4), 465–481 (1998)
Desrues, J., Viggiani, G.: Strain localization in sand: an overview of the experimental results obtained in grenoble using stereophotogrammetry. Int. J. Numer. Anal. Methods 28(4), 279–321 (2004)
Liu, Ch., Nagel, S.R.: Sound in sand. Phys. Rev. Lett. 68(15), 2301–2304 (1992)
Jia, X., Caroli, C., Velicky, B.: Ultrasound propagation in externally stressed granular media. Phys. Rev. Lett. 82(9), 1863–1866 (1999)
Velea, D., Shields, F.D., Sabatier, J.M.: Elastic wave velocities in partially saturated ottawa sand: experimental results and modeling. Soil Sci. Soc. Am. J. 64(4), 1226–1234 (2000)
Liu, C.H., Nagel, S.R., Schecter, D.A., Coppersmith, S.N., Majmudar, S., Narayan, O., Witten, T.A.: Force fluctuations in bead packs. Science 269(5223), 513–515 (1995)
Mueth, D.M., Jaeger, H.M., Nagel, S.R.: Force distribution in a granular medium. Phys. Rev. E 57(3), 3164–3169 (1998)
Løvoll, G., Måløy, K.J., Flekkøy, E.G.: Force measurements on static granular materials. Phys. Rev. E 60(5), 5872–5878 (1999)
Majmudar, T.S., Behringer, R.P.: Contact force measurements and stress-induced anisotropy in granular materials. Nature 435(1079), 1079–1082 (2005)
Veje, C.T., Howell, D.W., Behringer, R.P.: Kinematics of a two-dimensional granular couette experiment at the transition to shearing. Phys. Rev. E 59(1), 739–745 (1999)
Peters, J.F., Muthuswamy, M., Wibowo, J., Tordesillas, A.: Characterization of force chains in granular material. Phys. Rev. E 72(4), 041307 (2005)
Tordesillas, A., Muthuswamy, M.: On the modeling of confined buckling of force chains. J. Mech. Phys. Solids 57(4), 706–727 (2009)
Albert, I., Tegzes, P., Kahng, B., Albert, R., Sample, J.G., Pfeifer, M., Barabási, A.L., Vicsek, T., Schiffer, P.: Jamming and fluctuations in granular drag. Phys. Rev. Lett. 84(22), 5122–5125 (2000)
Geng, J., Behringer, R.P.: Slow drag in two-dimensional granular media. Phys. Rev. E 71(1), 011302 (2005)
Métayer, J.F., Suntrup III, D.J., Radin, C., Swinney, H.L., Schröter, M.: Shearing of frictional sphere packings. Europhys. Lett. 93(6), 64003 (2011)
Hutchings, I.M.: Energy absorbed by elastic waves during plastic impact. J. Phys. D Appl. Phys. 12(11), 1819 (1979)
McLaskey, G.C., Glaser, S.D.: Micromechanics of asperity rupture during laboratory stick slip experiments. Geophys. Res. Lett. 38(12), L12302 (2011)
Gilardi, G., Sharf, I.: Literature survey of contact dynamics modelling. Mech. Mach. Theory 37(10), 1213–1239 (2002)
Bardenhagen, S.G., Brackbill, J.U.: Dynamic stress bridging in granular material. J. Appl. Phys. 83(11), 5732–5740 (1998)
Owens, E.T., Daniels, K.E.: Sound propagation and force chains in granular materials. Europhys. Lett. 94(5), 54005 (2011)
Cody, G.D., Goldfarb, D.J., Storch, G.V., Norris, A.N.: Particle granular temperature in gas fluidized beds. Powder Technol. 87(3), 211–232 (1996)
Gardel, E., Seitaridou, E., Facto, K., Keene, E., Hattam, K., Easwar, N., Menon, N.: Dynamical fluctuations in dense granular flows. Philos. Trans. R. Soc. A 367(1909), 5109–5121 (2009)
Michlmayr, G., Or, D., Cohen, D.: Fiber bundle models for stress release and energy bursts during granular shearing. Phys. Rev. E 86, 06130 (2012)
Michlmayr, G., Cohen, D., Or, D.: Shear induced force fluctuations and acoustic emissions in granular material. J. Geophys. Res. 118(12), 6086–6098 (2013)
Hidalgo, R.C., Grosse, C.U., Kun, F., Reinhardt, H.W., Herrmann, H.J.: Evolution of percolating force chains in compressed granular media. Phys. Rev. Lett. 89(20), 205501 (2002)
Turcotte, D.L., Newman, W.I., Shcherbakov, R.: Micro and macroscopic models of rock fracture. Geophys. J. Int. 152(3), 718–728 (2003)
Hertz, H.: Über die Berührung fester elastischer Körper (On the contact of elastic solids). Journal für die reine und angewandte Mathematik 92, 156–171 (1882). For English translation see Miscellaneous papers by Hertz, H. (eds). Jones and Schott. Macmillian, London (1896)
Landau, L.D., Lifshitz, E.M.: Theory of Elasticity, 3rd edn. Pergamon Press, Oxford (1986)
Bracewell, R.N.: The Fourier Transform and Its Applications, 2nd edn. McGraw-Hill, New York (1986)
Hunter, S.: Energy absorbed by elastic waves during impact. J. Mech. Phys. Solids 5(3), 162–171 (1957)
Thornton, C.: Numerical simulations of deviatoric shear deformation of granular media. Geotechnique 50(1), 43–53 (2000)
Mair, K., Hazzard, J.F.: Nature of stress accommodation in sheared granular material: insights from 3d numerical modeling. Earth Planet Sci. Lett. 259(3–4), 469–485 (2007)
Welker, P., McNamara, S.: Precursors of failure and weakening in a biaxial test. Granul. Matter 13, 93–105 (2011)
Pohlman, N.A., Severson, B.L., Ottino, J.M., Lueptow, R.M.: Surface roughness effects in granular matter: influence on angle of repose and the absence of segregation. Phys. Rev. E 73(3), 031304 (2006)
Zaitsev, S.I.: Robin Hood as self-organized criticality. Physica A Stat. Mech. Appl. 189(3–4), 411–416 (1992)
Buldyrev, S.V., Ferrante, J., Zypman, F.R.: Dry friction avalanches: experiment and theory. Phys. Rev. E 74(6), 066110 (2006)
Sammonds, P., Ohnaka, M.: Evolution of microseismicity during frictional sliding. Geophys. Res. Lett. 25(5), 699–702 (1998)
Yabe, Y.: Rate dependence of AE activity during frictional sliding. Geophys. Res. Lett. 29(10), 1388 (2002)
Mair, K., Marone, C., Young, R.P.: Rate dependence of acoustic emissions generated during shear of simulated fault gouge. Bull. Seismol. Soc. Am. 97(6), 1841–1849 (2007)
Tordesillas, A., Walker, D.M., Lin, Q.: Force cycles and force chains. Phys. Rev. E 81(1), 011302 (2010)
Somfai, E., Roux, J.N., Snoeijer, J.H., van Hecke, M., van Saarloos, W.: Elastic wave propagation in confined granular systems. Phys. Rev. E 72(2), 021301 (2005)
Schmitz, T.L., Smith, K.S.: Mechanical Vibrations: Modeling and Measurement. Springer, New York (2012)
Tordesillas, A.: Force chain buckling, unjamming transitions and shear banding in dense granular assemblies. Philos. Mag. 87(32), 4987–5016 (2007)
Radjai, F., Richefeu, V.: Contact dynamics as a nonsmooth discrete element method. Mech. Mater. 41(6), 715–728 (2009)
Raischel, F., Kun, F., Hidalgo, R.C., Herrmann, H.J.: Statistical Damage Models: Fiber Bundle Models, chapter Statistical Damage Models: Fiber Bundle Models, pp. 443–471. Universität Stuttgart (2006)
Dalton, F., Petri, A., Pontuale, G.: A random neighbour model for yielding. J. Stat. Mech. Theory Exp. 2010(3), P03011 (2010)
Pradhan, S., Hemmer, P.C.: Prediction of the collapse point of overloaded materials by monitoring energy emissions. Phys. Rev. E 83(4), 041116 (2011)
Peires, F.T.: Tensile tests for cotton yarns V. The weakest link: theorems on the strength of long composite specimens. J. Text. Inst. 17, T355–T368 (1926)
Daniels, H.E.: The statistical theory of the strength of bundles of threads. 1. Proc. R. Soc. A 183(995), 405–435 (1945)
Timár, G., Kun, F.: Crackling noise in three-point bending of heterogeneous materials. Phys. Rev. E 83(4), 046115 (2011)
Raischel, F., Kun, F., Herrmann, H.J.: Simple beam model for the shear failure of interfaces. Phys. Rev. E 72(4), 046126 (2005)
Halász, Z., Kun, F.: Slip avalanches in a fiber bundle model. Europhys. Lett. 89(2), 26008 (2010)
Halasz, Z., Kun, F.: Fiber bundle model with stick-slip dynamics. Phys. Rev. E 80(2), 027102 (2009)
Kruyt, N.P., Antony, S.J.: Force, relative-displacement, and work networks in granular materials subjected to quasistatic deformation. Phys. Rev. E 75(5), 051308 (2007)
Skempton, A., Bishop, A.: The measurement of the shear strength of soils. Geotechnique 2(2), 98–108 (1950)
Thornton, C., Zhang, L.: Numerical simulations of the direct shear test. Chem. Eng. Technol. 26(2), 153–156 (2003)
Cui, L., O’Sullivan, C.: Exploring the macro- and micro-scale response of an idealised granular material in the direct shear apparatus. Geotechnique 56(7), 455–468 (2006)
Liu, S.H.: Simulating a direct shear box test by dem. Can. Geotech. J. 43(2), 155–168 (2006)
Kozicki, J., Niedostatkiewicz, M., Tejchman, J., Muhlhaus, H.B.: Discrete modelling results of a direct shear test for granular materials versus FE results. Granul. Matter 15(5), 607–627 (2013)
Acknowledgments
This study is part of “Triggering of Rapid Mass Movements” (TRAMM) funded by the Competence Center Environment and Sustainability (CCES) of the ETH domain (Switzerland). The authors wish to thank Daniel Breitenstein for his technical support with the experimental work presented in this paper.
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Michlmayr, G., Or, D. Mechanisms for acoustic emissions generation during granular shearing. Granular Matter 16, 627–640 (2014). https://doi.org/10.1007/s10035-014-0516-2
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DOI: https://doi.org/10.1007/s10035-014-0516-2