List of candidates ordered by merit :

• N° 1 : Sacha Duverger
• N° 2 : Raden Harya Dananjaya Hesti Indrabaskara
• N° 3 : Sohrab Salehin Najafabadi
• N° 4 : Dario Sciandra

Summary :

Multi-scale methods (e.g. Miehe et al., 2010 ; Nguyen et al., 2014 ; Liang & Zhao, 2019) constitute a recent and promising modelling approach in geotechnics. Owing to the discrete nature of soil materials, a phenomenological description of their constitutive behavior is indeed highly challenging (e.g. Duriez & Vincens, 2015), which hinders an optimal design and assessment of geo-structures. On the other hand, multi-scale modelling approaches rely on a direct simulation of the interacting soil particles at the material’s scale, which is exported to the structure scale through classical continuous approaches, such as the Finite Element Method (Miehe et al., 2010 ; Nguyen et al., 2014) or, more recently, the Material Point Method (Liang & Zhao, 2019). The present PhD thesis is devoted to develop such an approach, with a special interest into large deformations and failure conditions at the structure scale, following Liang & Zhao (2019). Applications lie in the field of hydraulic earth works, such as dams and dikes.