Granular Matter

, 20:39 | Cite as

Mixtures of hard and soft grains: micromechanical behavior at large strains

  • Guilhem MollonEmail author
Original Paper


In this paper, several simulations involving the compaction and the shearing of mixtures of hard and soft grains are performed in 2D plane-strain conditions. The multibody meshfree numerical tool developed for this purpose is first presented, and the focus is then put on the influence of the proportions of rigid and deformable grains in the mixture on the mechanical response at large strains. Dedicated postprocessing techniques reveal a wide range of behaviors, both in terms of macroscopic response and in micromechanical phenomena. Broadly speaking, the strength and the dilatancy of the mixture decrease when the proportion of soft grains is increased. There are, however, interesting exceptions to this trend at very high and very low contents of soft grains, which are analyzed in dedicated sections. This preliminary work paves the way to more comprehensive studies of this class of materials, which is still hardly understood but presents some potential in a wide range of applications.


Granular materials Soft and hard mixtures Deformable grains Meshfree methods Discrete Element Modeling Large strain behavior 



Valuable and useful comments by the two anonymous reviewers are gratefully acknowledged by the author.

Compliance with ethical standards

Conflict of interest

The author acknowledges that this study contains original material, as a result of a purely academic study without any kind of private funding or conflict of interest. Its publication has been approved tacitly by the responsible authorities at the institute where the work has been carried out.

Supplementary material

10035_2018_812_MOESM1_ESM.avi (40.2 mb)
Video 1: Kinematics of the simulations (video 41,146 KB)
10035_2018_812_MOESM2_ESM.avi (85.6 mb)
Video 2: von Mises stress fields of the simulations (video 87,662 KB)

Video 3: Strain rate fields of the simulations (video 1,40,893 KB)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.LaMCoS, INSA-Lyon, CNRS UMR5259Université de LyonVilleurbanneFrance

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