The present paper is concerned with the analysis of microstructural instabilities in granular materials and with their relation to both macroscopic localized and diffuse failure modes. A discrete-element (DEM) computer simulation of deformations in an idealized two-dimensional frictional particle assembly subject to various biaxial loadings—notably drained compression and proportional strain paths—is proposed as a prototype model to investigate the underlying physics of material failure. Based on the transfer of the second-order work criterion to the microscopic level, we seek for contacts tagged as within the granular assembly that undergo instabilities during loading history. The DEM computations yield a description of failure as a microstructural self-organization process by which contacts aggregate into clusters which can either grow or breakdown as the network of contacts adjusts itself to externally applied loads during deformation history. It is proposed here that there is a close relation between the clustering of contacts and the resulting failure mode based on cluster size and spatial distribution. Localized deformations are found to correlate well with sustained growth of the above clusters, while diffuse failure has more to do with smaller clusters experiencing suppressed development. A comprehensive statistical analysis on the clusters lends support to this conclusion.
Accepted:
Published online:
Nejib Hadda 1; François Nicot 2; Richard Wan 1; Félix Darve 3
@article{CRMECA_2015__343_2_143_0, author = {Nejib Hadda and Fran\c{c}ois Nicot and Richard Wan and F\'elix Darve}, title = {Microstructural self-organization in granular materials during failure}, journal = {Comptes Rendus. M\'ecanique}, pages = {143--154}, publisher = {Elsevier}, volume = {343}, number = {2}, year = {2015}, doi = {10.1016/j.crme.2014.09.009}, language = {en}, }
TY - JOUR AU - Nejib Hadda AU - François Nicot AU - Richard Wan AU - Félix Darve TI - Microstructural self-organization in granular materials during failure JO - Comptes Rendus. Mécanique PY - 2015 SP - 143 EP - 154 VL - 343 IS - 2 PB - Elsevier DO - 10.1016/j.crme.2014.09.009 LA - en ID - CRMECA_2015__343_2_143_0 ER -
Nejib Hadda; François Nicot; Richard Wan; Félix Darve. Microstructural self-organization in granular materials during failure. Comptes Rendus. Mécanique, Mechanics of granular and polycrystalline solids, Volume 343 (2015) no. 2, pp. 143-154. doi : 10.1016/j.crme.2014.09.009. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2014.09.009/
[1] Contact forces in a granular packing, Chaos, Volume 9 (1999) no. 3, pp. 544-550
[2] On the modeling of confined buckling of force chains, J. Mech. Phys. Solids, Volume 57 (2009), pp. 706-727
[3] Force cycles and force chains, Phys. Rev. E, Volume 81 (2010), p. 011302
[4] Structural stability and jamming of self-organized cluster conformations in dense granular materials, J. Mech. Phys. Solids, Volume 59 (2011), pp. 265-296
[5] Micromechanical study of fabric evolution in quasi-static deformation of granular materials, Mech. Mater., Volume 44 (2012), pp. 120-129
[6] Uniqueness and localization, I. Associative and non-associative elastoplasticity, Int. J. Solids Struct., Volume 28 (1991) no. 2, pp. 197-213
[7] Controllability of the incremental response of soil specimens subjected to arbitrary loading programs, J. Mech. Behav. Mater., Volume 5 (1994) no. 2, pp. 193-201
[8] Failure in geomaterials, continuous and discrete analyses, Comput. Methods Appl. Mech. Eng., Volume 193 (2004), pp. 3057-3085
[9] A micro-mechanical investigation of bifurcation in granular materials, Int. J. Solids Struct., Volume 44 (2007), pp. 6630-6652
[10] Diffuse and localized failure modes: two competing mechanisms, Int. J. Numer. Anal. Methods Geomech., Volume 35 (2011) no. 5, pp. 586-601
[11] Failure in rate-independent granular materials as a bifurcation toward a dynamic regime, Int. J. Plast., Volume 29 (2012), pp. 136-154
[12] A general theory of uniqueness and stability in elastic-plastic solids, J. Mech. Phys. Solids, Volume 6 (1958), pp. 236-249
[13] Diffuse failure in geomaterials, experiments, theory and modelling, Int. J. Numer. Anal. Methods Geomech., Volume 35 (2011) no. 16, pp. 1731-1773
[14] The localisation of plastic deformation (W.T. Koiter, ed.), Theoretical and Applied Mechanics, IUTAM Congress, 1976, pp. 207-220
[15] Diffuse instabilities with transition to localization in loose granular materials, Int. J. Numer. Anal. Methods Geomech., Volume 37 (2013) no. 10, pp. 1292-1311
[16] Micromechanical analysis of second order work in granular media, Granul. Matter, Volume 15 (2013), pp. 221-235
[17] Inertia effects as a possible missing link between micro and macro second-order work in granular media, Int. J. Solids Struct., Volume 49 (2012) no. 10, pp. 1252-1258
[18] Multiscale characterization of diffuse granular failure, Philos. Mag., Volume 92 (2012) no. 36, pp. 4547-4587
[19] A discrete numerical model for granular assemblies, Geotechnique, Volume 29 (1979) no. 1, pp. 47-65
[20] V. Šmilauer, E. Catalano, B. Chareyre, S. Dorofeenko, J. Duriez, A. Gladky, J. Kozicki, C. Modenese, L. Scholtès, L. Sibille, J. Stránský, K. Thoeni, Yade Documentation, The Yade Project, 2010.
[21] A computer model for simulating progressive large scale movements in blocky rocky systems, Proceedings of the Symposium of the International, Society of Rock Mechanics, Nancy, France, 1971, pp. 129-136
[22] Localization of the deformation in tests on sand sample, Eng. Fract. Mech., Volume 21 (1985) no. 4, pp. 909-921
[23] Shear band initiation in granular materials: experimentation and theory (F. Darve, ed.), Geomaterials Constitutive Equations and Modelling, Taylor and Francis Books, Elsevier, 1990, pp. 283-310
[24] Shear band inclination and shear modulus of sand in biaxial tests, Int. J. Numer. Anal. Methods Geomech., Volume 4 (1980) no. 2, pp. 103-119
[25] Localization effects in triaxial tests on sand, Delft, The Netherlands (1982)
[26] Granular media failure along triaxial proportional strain paths, Eur. J. Environ. Civ. Eng., Volume 17 (2013) no. 9, pp. 777-790
[27] A comparison of some constitutive laws under radially symmetric loading and unloading (I.W. Wittke, ed.), 3rd International Conference on Numerical Methods in Geomechanics, A.A. Balkema, Aachen, Germany, 1979, pp. 1309-1323
Cited by Sources:
Comments - Policy