Summer is at full speed in Grenoble, and so is our GéoMéchanique group at Laboratoire 3SR (Sols, Solides, Structures – Risques). Find all the news in the 39th edition of our newsletter. Please forward this letter to colleagues and friends. Enjoy!
If you have something you want to share in the next newsletter, please do not hesitate to contact us at: geomecanique.newsletter@3sr-grenoble.fr .
Conferences & Events
ICTMS 2022
From June 27th to July 1st, the 5th International Conference on Tomography of Materials & Structures took place in Grenoble, and the 3SR team was present in both the scientific and organizing committees. A massive attendance of researchers from all over the world made such a nice week, full of x-rays, cheeses and wines!
The keynotes presentations were given by:
- Alexandra Pacureanu (ESRF, France) : Hard X-ray nano-imaging for life sciences
- Joost Batenburg (University of Leiden, The Netherlands) : Advanced X-Ray Tomography Reconstruction: Classical methods, Machine learning approaches, and how to attain the best of both worlds.
- Christian Schlepütz (PSI – SLS, Switzerland) : Time-resolved microtomography for materials science: Unveiling structural evolution in dynamic processes
- Stephen Hall (University of Lund, Sweden) ND imaging of processes in granular- and geo-materials from intra-granula to bulk scale
- Karen Chen-Wiegart (Stony Brook University, USA)
- Synchrotron X-ray nano-tomography and multimodal characterization of materials for energy applications.
- Jean Susini (Soleil, France) : Synchrotron-Based X-ray Imaging: Trends, Challenges, and new Opportunities.
Our GéoMéchanique team was well represented by: Alessandro Tengattini (NeXT 2.0 : the upgrade of the neutron and x-ray tomograph at ILL), Olga Stamati (3D particle tracking in flowing granular media with only X-ray radiography: application to two case studies), Ilija Vego (5D Tomography of couscous exposed to high relative humidity), Couture Cyrille (Fast x-ray tomography of immiscible fluid fingering in porous sandstone), Pierre Besuelle (Deformation mechanisms in a clay rock at the micron-scale), and Gustavo Pinzón (Metrological advances on contact detection from X-ray tomography images).
Some students from 3SR giving a hand with the logistics of ICTMS, there is always time for fun pictures !
Yade hackathon!
The core Yade open-source software developers gathered in Frieberg, Germany from 23/06-25/06 for a hackathon! Many familiar faces from Laboratoire 3SR made their appearances including Bruno Chareyre, Janek Kozicki, Jerome Duriez, Václav Šmilauer, Katia Boschi, and Robert Caulk.
Yade hackaton team!
Yade short-course!
Robert Caulk and Bruno Chareyre completed a short course covering thermo-hydro-mechanical processes in particulate materials. Among the participants included students from Italy, France, China, Netherlands, and the United Kingdom and even a few familiar faces from Laboratoire 3SR. All slides and tutorials from the short-course are publicly available on the Yade website at: https://yade-dem.org/doc/index-toctree.html#short-courses.
Bruno, Robert and some of the attendees of the Yade course
CPT ’22
Our great PhD student Ankit Sharma participated in the 5th International Symposium on Cone Penetration Testing that took place in Bologna. He presented his new cyclic CPT test and discussed how it can be more suited to identify liquefiable soils – promising results ahead!
Seminars and Visits
- April 12: seminar by John Rudnicki (Northewstern University, USA). The slides and talk recording can be found here: https://3sr.univ-grenoble-alpes.fr/fr/actualites/john-rudnicki.
- Mai 23: Cino delivered the Prague Geotechnical Lecture.
- June 16: seminar by Benjy Marks (The talk recording can be found here: https://videos.univ-grenoble-alpes.fr/video/23644-3sr-seminar-benjy-marks/)
Cino wearing a tie in Prague
Developments
Multi-phase flow module on Yade
Yade-DEM’s module for multi-phase flow has been further extended to account for vapor transfers. The work was part of the PhD of Son Thai Pham at the Otto von Guericke University of Magdeburg, Thermal Process Engineering Dept., in order to analyze crack patterns in drying materials. Results have been published in Powder Technology by Thai Pham et al. (2022).
Percolation of air and capillary forces resulting the slow drying of a porous material (Thai Pham et al. 2022).
Master projects
The 28 students of our Master program “Geomechanics, Civil Engineering and Risks” defended their Master dissertation in the week 4-7 July (10 of them did their internship in our team GéoMécanique). On July 7, a BBQ took place to celebrate the end of the program. It was back after two years of absence — because of the pandemic.
Master students at the BBQ
Visiting Scholars
- Our colleague Benjy Marks visited us for the last month!. Benjy works at the University of Sydney, and he is an expert in granular flow problems, such as avalanche runout, landslide and debris flow modelling.
- On April 8, Cyrille Couture has moved to Japan for a post-doc at the Port and Airport Research Institute. He is working with Daiki Takano and his research team. Good luck!
PhD graduates!
Olatounde Yaba defended his PhD titled: “Improvement of Railway Trackbeds using Geogrids – Analysis of Mechanical Behaviour, Settlement Reduction and Increase in Effective Bearing Capacity”, and prepared under the supervision of Fabrice Emeriault. Bravo Docteur !
Recent publications
- Son Thai Pham, Bruno Chareyre, Evangelos Tsotsas, Abdolreza Kharaghani, Pore network modeling of phase distribution and capillary force evolution during slow drying of particle aggregates, Powder Technology, https://doi.org/10.1016/j.powtec.2022.117627.
- Sharma, A., Rapanakis, P., Incardona, E., Dano, C., Sibille, L., Chareyre, B., & Sadrabadi, H. H. (2022). New method for assessing soil liquefaction resistance using a cyclic cone penetrometer. In Cone Penetration Testing 2022 (pp. 1102-1106). CRC Press.
- Vego, I., Tengattini, A., Andò, E., Lenoir, N., & Viggiani, G. (2022). Effect of high relative humidity on a network of a water-sensitive particles (couscous) as revealed by in-situ x-ray tomography. Soft Matter.
- Shahin G., Papazoglou A., Marinelli F., Viggiani G., Buscarnera G. (2022) – Experimental Study of Compaction Localization in Carbonate Rock and Constitutive Modeling of Mechanical Anisotropy. International Journal for Numerical and Analytical Methods in Geomechanics, accepted June 2022.
- Yin Q., Andò E., Viggiani G., Sun W. (2022) – Freezing-induced stiffness and strength anisotropy in freezing clayey soil: phenomenological theory, numerical modeling, and experimental validation. International Journal for Numerical and Analytical Methods in Geomechanics, 46:11, 2087-2114.