Séminaires > Fluid-driven fracture propagation under seismic loadings
Date : 21 Mai, 14h
Lieu : MSI, Amphi 100
Résumé :
Quasi-brittle materials, such as concrete, rocks, ceramics and some composites, exhibit complex non-
linear behaviors that lie between brittle and ductile failure. Fluid-driven fracture propagation is a
multiscale, multiphysics phenomenon that involves crack initiation and propagation, fluid diffusion
into the fractured medium and hydraulic fracture interactions with natural fractures etc. This physical
process is encountered in many practical situations (hydraulic fracturing of dams [1], Enhanced
geothermal systems, petroleum engineering etc.). Under seismic excitations, the cyclic nature of
loadings complicates this interaction due to transient pressure variations and the phenomenon of crack
opening/closing.
This talk is about computational modelling of fluid-driven fracture propagation under seismic
loadings. The fracture process is described within the framework of the Finite Element Method using
a continuum regularized approach [2]. The fluid-fracture interactions are described within the
framework of a poromechanical approach [1]. Finally, The mathematical tools and the numerical
strategy are exposed.
[1] Bessaid MI, Matallah M, Rouissat B. A poromechanical-damage-based-model for water-driven
fracture modeling of concrete gravity dams. Int J Numer Anal Methods Geomech. 2022 ; 46 : 469–
485. https://doi.org/10.1002/nag.3308
[2]Matallah, M., La Borderie, C. and Maurel, O. (2010), A practical method to estimate crack
openings in concrete structures. Int. J. Numer. Anal. Meth. Geomech., 34 : 1615-1633.
https://doi.org/10.1002/nag.876