The school year has started and that means autumn is threatening your shorts, swim trunks, and sandals. But not to worry, unlike the now barren fig tree out front Galilée, the 28th edition of the GéoMécanique newsletter brings fruit in the form of summer 2019 publications, conferences, invited talks, and activities generated by the GéoMécanique group at Laboiratoire 3SR (Sols, Solides, Structures – Risques). Please feel free to forward this letter to colleagues and friends. Enjoy!
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Don’t forget your roots (for slope stability considerations)!
Glyn Bengough (University of Dundee and Hutton Institute) visited us on September 17th, 2019 to give the first seminar of our annual 3SR seminar series. His engaging seminar covered “Root–soil mechanical and hydrological interactions different scales”.
Glyn enlightening 3SR on root-soil mechanical interactions
DEM8 conference recap
A group of researchers and students represented 3SR at DEM8, the 8th international conference on discrete element methods at University of Twente in Enschede, Netherlands. Between July 22-26th, Vincent Richefeu chaired the particle breakage session, Bruno Chareyre presented in the open source software and two phase flow sessions , Cyrille-B Couture discussed FEM-DEM couplings, and Robert Caulk introduced an open framework for thermo-hydro-mechanical simulations .
 Chareyre B., Montellà, E.P., Yuan, C., Gens, A. (2019), A hybrid pore network – LBM method for integrating flow of immiscible phases in DEM. In 8th International Conference on Discrete Element Methods. (fulltext)
 Caulk, R.A., Kozicki, J., Kunhappan, D., Maurin, R., Montellà, E.P., Sweijen, T., Yuan, C., Chareyre, B. (2019), Yade’s (undeniable) transformation into a model project of optimzation, multi-physics couplings, and user support. In 8th International Conference on Discrete Element Methods. (fulltext)
 Caulk, R.A., Chareyre, B. (2019), An open framework for the simulation of coupled Thermo-Hydro-Mechanical processes in Discrete Element Systems. In 8th International Conference on Discrete Element Methods. (fulltext)
Up and Running! Open Geomechanics Journal
Cino Viggiani and Edward Andò (among the editors of Open Geomechancics) are pleased to announce that Open Geomechanics, a diamond open access journal run by researchers, is up and running. There are already two papers available online (open access of course); one demonstrating a hyperplasticity framework conveyed with convex analysis  and the other mathematically examining the effect of proppant on hydraulic fracture geometry . Find both articles along with their riveting review histories online. Consider adding your next article to this diamond open access journal.
 Houlsby, Guy T. Frictional Plasticity in a Convex Analytical Setting. Open Geomechanics, Volume 1 (2019) article no. 3, 10 p. doi : 10.5802/ogeo.2. (full text)
 Selvadurai, A.P.S. Proppant-Induced Opening of Hydraulically Created Fractures. Open Geomechanics, Volume 1 (2019) article no. 2, 10 p. doi : 10.5802/ogeo.1. (full text)
A look at some recent journal publications
Max, Eddy, and Cino coauthored the following two papers which were accepted for publication:
Nadimi S., Fonseca J., Andò E., Viggiani G. (2019) – A micro finite element model for soil behaviour: experimental evaluation for sand under triaxial compression. Géotechnique , accepted August 2019.
Wiebicke M., Andò E., Viggiani G., Herle I. (2019) – Measuring the evolution of contact fabric in shear bands with x-ray tomography. Acta Geotechnica, accepted September 2019.
On September 13, Ilaria Soriano successfully defended her PhD in Edinburgh, Scotland. Ilaria’s PhD is entitled “Bands of localised deformation in weakly cemented sands: the example of Bédoin (southern France)” and was jointly supervised by Elma Charalampidou and Helen Lewis at Heriot-Watt University and Cino Viggiani at Université Grenoble Alpes. This was a PhD in cotutelle, i.e., she obtained a PhD from both universities.
On July 16th, Eduard Puig Montellà presented his research encompassing “Modeling capillarity and two-phase flow in granular media: from pore-scale to network scale”. He was supervised by Bruno Chareyre and Antonio Gens, while his jury included: Hugues BODIGUEL (INP Grenoble), S. Majid HASSANIZADEH (Utrecht University), Jean-Yves DELENNE (INRA), Vanessa MAGNANIMO (University of Twente).
Recommence – Masters Program
On September 9, the 13th edition of our well-received one-year master program in “geomechanics, civil engineering and risks” recommenced in Grenoble. This year, we have a diverse class of 24 students coming from 11 countries worldwide.
Lectures and talks
Cino Viggiani was busy this summer delivering four keynote/plenary/invited lectures on opposites sides of the globe:
– June 2019: plenary lecture at the annual conference of the Engineering Mechanics Institut (EMI2019) in Pasadena, USA (conference link)
– June 2019: keynote lecture at the 7th International Symposium on Deformation Characteristics of Geomaterials (IS-Glasgow) in Scotland (conference link)
– September 2019: invited plenary lecture at the 17th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE) in Reykjavik, Iceland (https://www.ecsmge-2019.com/). A pdf of the associated paper can be found here.
– September 2019: invited lecture at the conference of AIMETA, the Italian Association of Theoretical and Applied Mechanics (conference link)