Shear test on viscoelastic granular material using Contact Dynamics simulations
1 ICUBE, UMR 7347, CNRS, INSA de Strasbourg, Strasbourg, France
2 Institut Grund- und Straßenbau, Hochschule Karlsruhe Technik und Wirtschaft, Karlsruhe, Germany
* e-mail: firstname.lastname@example.org
Published online: 30 June 2017
By means of 3D contact dynamic simulations, the behavior of a viscoelastic granular material under shear loading is investigated. A viscoelastic fluid phase surrounding the solid particles is simulated by a contact model acting between them. This contact law was implemented in the LMGC90 software, based on the Burgers model. This model is able to simulate also the effect of creep relaxation. To validate the proposed contact model, several direct shear tests were performed, experimentally and numerically using the Leutner device. The numerical samples were created using spheres with two particle size distribution, each one identified for two layers from a road structure. Our results show a reasonable agreement between experimental and numerical data regarding the strain-stress evolution curves and the stress levels measured at failure. The proposed model can be used to simulate the mechanical behavior of multi-layer road structure and to study the influence of traffic on road deformation, cracking and particles pull-out induced by traffic loading.
© The Authors, published by EDP Sciences, 2017
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