Hadrien Rattez
Recent publications

Research group(s): GCE

PhD and Post-doc researchers under my supervision:

Role of multi-physical couplings across scales on the mechanical instability of volcanic flanks
Jens Niclaes

A phase-field discrete elements model applied to granular material
Alexandre Sac-Morane

The main goal of the research project is to combine a phase-field modelization with a discrete elements modelization. This new approach is then applied to granular material to investigate the effects of the environment. A model is built and will be calibrated by experiments.

Influence of soil saturation on earthen embankments failure by overtopping
Nathan Delpierre

In the current context of climate change and aging infrastructure, the failure of earthen dikes is becoming a
critical issue. Dikes have an essential protection role in flood defense, coastal protection or for the storage of
mining industry waste. The objective of the research is to develop and validate a simulation model to take into
account the effect of
saturation of the dike material on its stability when it is subjected to overtopping flows, which alone cause 34%
of failures (Costa, 1985). For this purpose, a complete simulation model will be developed, taking into account
the internal and external flows as well as the erosion and the consequences on the evolution of the stability of
the dam. The originality of this project lies in the multidisciplinary approach that takes into account the
evolution of the dike both from a hydraulic and hydrogeological point of view (water content, flow velocity and
surface erosion) but also from the point of view of the geomechanics and thus of the intrinsic stability of the
dike. Laboratory experiments will be carried out in order to validate the model experimentally. At this level, the
novelty brought by this project is the control of the evolution of the water content of the dike in real time with
pressure gauges and tensiometers. The acquired data will allow to calibrate the model and to confirm the key
role of the initial saturation in the dam failure.
Finally, based on the critical characteristics defined in terms of dike saturation, a study on large-scale
monitoring techniques will be carried out. In particular, the possibility of using technologies such as
photogrammetry or GPR (Ground Penetrating Radar) to determine the degree of saturation of a soil will be
investigated in the context of dike monitoring.

Luc Simonin

Installation method and ageing of soil are of critical importance to assess the lateral capacity of monopile foundations of offshore wind turbines.
In order to mitigate the noise disturbance and the damage to the monopile that impact driving of monopiles has, interest is growing for vibratory driving techniques. The impact of the choice of the installation technique on the lateral capacity of the monopile is however unknown.
The impact of the ageing of sand during the lifespan of a monopile is also unknown.
SAGE-SAND will explore these two questions thanks to medium-scale field testing, small-scale laboratory modelling, and advanced laboratory test. The development of new constitutive frameworks from micro to macro scales will allow to capture the observed behaviour numerically.

Recent publications

See complete list of publications

Journal Articles

1. Delpierre, Nathan; Rattez, Hadrien; Soares Frazao, Sandra. Finite volumes methods for coupled surface-subsurface flows. In: Journal of Hydraulic Research,. (Soumis).

2. Lesueur, Martin; Veveakis, Manolis; Rattez, Hadrien. Influence of cementation on the yield surface of rocks numerically determined from digital microstructures. In: International Journal of Plasticity, Vol. 156, no.Sept , p. 103338 (2022). doi:10.1016/j.ijplas.2022.103338.

3. Guével, A.; Rattez, Hadrien; Veveakis, E. Morphometric description of strength and degradation in porous media. In: International Journal of Solids and Structures, Vol. 241, no.111454 (2022). doi:10.1016/j.ijsolstr.2022.111454.

4. Lesueur, Martin; Rattez, Hadrien; Colomés, Oriol. μCT scans permeability computation with an unfitted boundary method to improve coarsening accuracy. In: Computers and Geosciences, Vol. 166, no.105118, p. 1-11 (2022). doi:10.1016/j.cageo.2022.105118.

5. Rattez, Hadrien; Shi, Yaozhong; Sac-Morane, Alexandre; Klaeyle, Timothée; Mielniczuk, Boleslaw; Veveakis, Manolis. Effect of grain size distribution on the shear band thickness evolution in sand. In: Géotechnique, Vol. 72, no.4, p. 350-363 (2022). doi:10.1680/jgeot.20.p.120.

6. Jacquey, Antoine B.; Rattez, Hadrien; Veveakis, Manolis. Strain localization regularization and patterns formation in rate-dependent plastic materials with multiphysics coupling. In: Journal of the Mechanics and Physics of Solids, Vol. 152, p. 104422 (2021). doi:10.1016/j.jmps.2021.104422.

7. Rattez, Hadrien; Disidoro, F.; Sulem, J.; Veveakis, M. Influence of dissolution on long-term frictional properties of carbonate fault gouge. In: Geomechanics for Energy and the Environment, Vol. 26, p. 100234 (2021). doi:10.1016/j.gete.2021.100234.

8. Seguí, C.; Rattez, Hadrien; Veveakis, M. On the Stability of Deep-Seated Landslides. The Cases of Vaiont (Italy) and Shuping (Three Gorges Dam, China). In: Journal of Geophysical Research: Earth Surface, Vol. 125, no. 7, p. 1-24 (2020). doi:10.1029/2019JF005203.

9. Guével, A.; Rattez, Hadrien; Veveakis, E. Viscous phase-field modeling for chemo-mechanical microstructural evolution: application to geomaterials and pressure solution. In: International Journal of Solids and Structures, Vol. 207, no. 15 December 2020, p. 230-249 (2020). doi:10.1016/j.ijsolstr.2020.09.026.

10. Rattez, Hadrien; Veveakis, M. Weak phases production and heat generation control fault friction during seismic slip. In: Nature Communications, Vol. 11, no. 1, p. 1-8 (2020). doi:10.1038/s41467-019-14252-5.

Conference Papers

1. Delpierre, Nathan; Soares Frazao, Sandra; Rattez, Hadrien. Coupled surface and subsurface flows for earthen embankments using finite-volume methods. 2023 xxx.

2. Rattez, Hadrien; Veveakis, Emmanouil; Mielniczuk, Boleslaw; Shi, Yaozhong; Sac-Morane, Alexandre; Klayelé, Timothée. Observation of Strain Localization by Digital Image Correlation to Study the Influence of Particle Size Distribution. In: 54th U.S. Rock Mechanics/Geomechanics Symposium, 2020, 978-0-9794975-5-1 xxx.

3. Rattez, Hadrien; Veveakis, Emmanouil. A Thermo-Chemo-Mechanical Model for Fault Friction. In: 54th U.S. Rock Mechanics/Geomechanics Symposium, 2020, 978-0-9794975-5-1 xxx.

4. Rattez, Hadrien; Stefanou, I.; Sulem, J.. Effect of Thermo-Poro-Mechanical Properties on the Stability of Faults. In: Poromechanics 2017 - Proceedings of the 6th Biot Conference on Poromechanics, 2017, 9780784480779, p. 1858-1865 xxx. doi:10.1061/9780784480779.230.

Book Chapters

1. Rattez, Hadrien. Theoretical and Numerical Analysis of Softening and Instabilities in Faults. In: Instabilities Modeling in Geomechanics (Geomechanics; xxx), Wiley-ISTE: Hoboken, New Jersey, 2021, p. 368 Pages. 978-1-789-45000-2. xxx xxx.

2. Stefanou, I.; Sulem, J.; Rattez, Hadrien. Cosserat approach to localization in geomaterials. In: Handbook of Nonlocal Continuum Mechanics for Materials and Structures , xxx, 2019, p. 687-711. 978-3-319-58727-1. xxx xxx. doi:10.1007/978-3-319-58729-5_10.

3. Rattez, Hadrien; Stefanou, I.; Sulem, J.; Veveakis, M.; Poulet, T.. Localisation of deformation for shearing of a fault gouge with cosserat microstructure and different couplings. In: Springer Series in Geomechanics and Geoengineering , xxx, 2017, p. 155-160. 978-3-319-56396-1. xxx xxx. doi:10.1007/978-3-319-56397-8_20.