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Granular media failure along triaxial proportional strain paths

Abstract : This paper revisits a famous phenomenon sometimes observed in granular soils: liquefaction. Liquefaction occurs when all stress components vanish. According to the loading conditions, and the initial void ratio of the soil specimen, it can be shown that a convenient stress quantity passes through a peak, and then decreases. It is usually thought that the deviatoric stress peak also corresponds to a failure state, since a sudden collapse of the specimen is expected from this point according to the loading control adopted. After a brief review of the theoretical background describing the occurrence of such phenomena (liquefaction and failure), the results of laboratory tests run along a triaxial proportional strain loading path are presented. Then, the main conclusions drawn are discussed and confirmed from numerical tests using a discrete element method. In both approaches, it is shown that the choice of the stress response variable is fundamental, in order to properly detect such a failure.
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https://hal.univ-lorraine.fr/hal-01501441
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Submitted on : Tuesday, April 4, 2017 - 11:51:40 AM
Last modification on : Thursday, March 4, 2021 - 11:04:07 AM

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François Nicot, Ali Daouadji, Nejib Hadda, Mohamad Jrad, Félix Darve. Granular media failure along triaxial proportional strain paths. European Journal of Environmental and Civil Engineering, Taylor & Francis, 2013, 17 (9), pp.777-790. ⟨10.1080/19648189.2013.819301⟩. ⟨hal-01501441⟩

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