1GR - Géosciences Rennes (Bâtiment 15 - Université de Rennes 1 - Campus de Beaulieu -263 Av du général Leclerc- CS 74205 - 35042 Rennes Cedex - France - France)
Abstract : Reliable numerical models of lithospheric deformation require robust solution methods. The latter should account for a complex and realistic rheological model and should also provide convergent and reproducible results.
Here we present models of crustal-scale deformation that accurately capture the phenomenon of strain localisation in two-dimensions. The use of viscous regularisation yields convergent numerical results. We will compare linearisation methods (consistent tangent, effective viscosity) and discuss the implementation of rheological models (power-law viscous, hardening/softening laws). We will also present three-dimensional models of crustal-scale strain localisation that benefit from both the above-described methods and the computing power of graphical processing units (GPUs).
https://hal-insu.archives-ouvertes.fr/insu-02539494
Contributor : Isabelle Dubigeon <>
Submitted on : Friday, April 10, 2020 - 10:34:32 AM Last modification on : Thursday, January 14, 2021 - 11:39:38 AM
Thibault Duretz, Rene de Borst, Ludovic Räss. Modelling lithosphere dynamics with robust rheological implementations: Towards 3D. European Geosciences Union General Assembly, Apr 2020, online, Austria. pp.EGU2020-13742. ⟨insu-02539494⟩