Grenoble Geomechanics Newsletter-no.18

This is the 18th edition of the GéoMécanique newsletter. It contains the latest news regarding research publications, conference visits and other activities of the staff and students from the GéoMécanique group of Laboratoire 3SR (Sols, Solides, Structures – Risques). If you have something you want to share, please don’t hesitate to contact us at: geomecanique.newsletter|AT| Please feel free to forward the letter to colleagues and friends, and let them know that they can subscribe by themselves here. Enjoy.

Visits and conferences

A number of people went to the International Workshop of Bifurcation and Degradation in Geomaterials (IWBDG2017) in Lemesos (Limassol) in Cyprus, starting with a keynote on localisation precursors from Jacques Desrues, and a large number of full-field experimental results on sand, sandstone, clayrocks, tuffeau…

PhD student Dorjan Dauti presented in the 7th International Conference on Coupled Problems in Science and Engineering held in Rhodes Island, Greece on 12-14 June. The title of the talk was: “A combined experimental and numerical approach for investigating concrete behavior at high temperature”. Coauthors in this work are: Stefano Dal Pont and Matthieu Briffaut from Laboratory 3SR, Benedikt Weber from Empa Laboratories in Switzerland and Giuseppe Sciume from University of Bordeaux.

A large cohort attended ICTMS 2017 (International Conference on Tomography and Material Structure) in Lund, Sweden:

  • PhD Students: Thanos Papazoglou, Olumide Okubadejo, Maddi Etxegarai, Mohamad Yehya, Jeanne Doreau, Riccardo Rorato
  • Others: Pascal Charrier, Alessandro Tengattini, Edward Andò, Cino Viggiani.

PG2017: The 8th International Conference on Micromechanics of Granular Media, or more popularly Powders and Grains, has been held in the beautiful city of Montpellier, South of France, on July 3-7, 2017. Our group delivered the following talks:

  • “Toward multiscale modelings of grain-fluid systems”, Bruno Chareyre
  • “Assessing contact forces in granular materials from experimental measurements of kinematics”, Mathias Tolomeo
  • “Evolution of particle breakage studied using x-ray tomography and the discrete element method”, Zeynep Karatza
  • “Experimental measurement of granular fabric and its evolution under shearing”, Max Wiebicke

and posters:

  • “Wear of sharp aggregates in a rotating drum”, Ivan Deiros
  • “Stochastic model for the micromechanics of jammed granular materials: experimental studies and numerical simulations”, Mathias Tolomeo
  • “Coupled flow and deformations in granular systems beyond the pendular regime”, Chao Yuan
  • “From continuum analytical description to discrete numerical modelling of localized fluidization in granular media”, Eduard Puig Montella
  • “Effects of a large number of cycles on pile shaft resistance analyzed at thegrain scale using x-ray tomography”, Jeanne Doreau Malioche
  • “A comparison between DEM and MPM for the modeling of unsteady flow”, Fabio Gracia
  • “Experimental investigation of mode I fracture for brittle tube-shaped particles”, Marta Stasiak
  • “Experimental and DEM analysis of the dissipation involved in the collision of a boulder with a substratum”, Bruna Garcia

Jeanne finally won the Best Poster Award among the 325 submissions.


Simulations of hydro-mechanical couplings in swelling granular polymers have been published in Powder Technology by T Sweijen, B Chareyre, SM Hassanizadeh and N Karadimitriou. The model implemented by T. Sweijen (Utrecht Hydrology group) is further extending previous developments by E. Catalano and C. Yuan. It is freely available as part of Yade DEM.

B. Chareyre commented on remarkable results reported by S. Khamseh, J.N. Roux and F. Chevoir in Physical Review E (2015). This discussion has been accepted by the editor and will appear soon in PRE.

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