Capillary cohesion and mechanical strength of polydisperse granular materials |
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Authors: | F Soulié M S El Youssoufi F Cherblanc C Saix |
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Institution: | (1) LMGC, UMR 5508, Université Montpellier 2, Place Eugène Bataillon, cc048, 34095 Montpellier Cedex 5, France |
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Abstract: | We investigate the macroscopic mechanical behaviour of wet polydisperse granular media. Capillary bonding between two grains
of unequal diameters is described by a realistic force law implemented in a molecular-dynamics algorithm together with a protocol
for the distribution of water in the bulk. Axial-compression tests are simulated for granular samples at different levels
of water content, and compared to experiments performed in similar conditions. We find good agreement between numerical and
experimental data in terms of the rupture strength as a function of water content. Our results show the importance of the
distribution of water for the mechanical behaviour. |
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Keywords: | 45 70 Mg Granular flow: mixing segregation and stratification 83 80 Fg Granular solids 81 05 Rm Porous materials granular materials |
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