Multi-Physics Modelling of Fault Mechanics Using REDBACK: A Parallel Open-Source Simulator for Tightly Coupled Problems

Poulet, Thomas; Paesold, Martin; Veveakis, Manolis

doi:10.1007/s00603-016-0927-y

Cited by 50 publications

(23 citation statements)

References 36 publications

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“…A displacementrotation-temperature-pore pressure incremental finite element formulation is used. The integration in time is implicit using the backward Euler method, 7 which is implemented in Redback (Poulet et al, 2016), a module of the Finite Element framework MOOSE (Gaston et al, 2009). …”

mentioning

confidence: 99%

The importance of Thermo-Hydro-Mechanical couplings and microstructure to strain localization in 3D continua with application to seismic faults. Part II: Numerical implementation and post-bifurcation analysis

Rattez

Stefanou

Sulem

et al. 2018

Journal of the Mechanics and Physics of Solids

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To cite this version:Hadrien Rattez, Ioannis Stefanou, Jean Sulem, Manolis Veveakis, Thomas Poulet. The importance of Thermo-Hydro-Mechanical couplings and microstructure to strain localization in 3D continua with application to seismic faults. AbstractIn this paper, we study the phenomenon of localization of deformation in fault gouges during seismic slip. This process is of key importance to understand

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mentioning

confidence: 99%

The importance of Thermo-Hydro-Mechanical couplings and microstructure to strain localization in 3D continua with application to seismic faults. Part II: Numerical implementation and post-bifurcation analysis

Rattez

Stefanou

Sulem

et al. 2018

Journal of the Mechanics and Physics of Solids

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“…Another important step in order to deal with more realistic scenaria would be the incorporation of the full viscoplastic model [14] along with the momentum balance law for the mixture. This would allow the presented theory to be applied to real geological models, where the effect of the geometry along with the possible uncertainties is expected to lead to even more complex dynamics.…”

Section: Discussionmentioning

confidence: 99%

“…Note that the effects of thermal pressurisation as well as that of the convective terms are neglected following the analysis in [8]. Here, we extend our previous consideration and adopt the visco-plastic flow law of [13,14] for the material, where the effect of high pore-pressure and temperature is taken into account:˙…”

Section: Problem Formulation-previous Workmentioning

confidence: 99%

Analysis of Dynamics in Multiphysics Modelling of Active Faults

et al. 2016

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Instabilities in Geomechanics appear on multiple scales involving multiple physical processes. They appear often as planar features of localised deformation (faults), which can be relatively stable creep or display rich dynamics, sometimes culminating in earthquakes. To study those features, we propose a fundamental physics-based approach that overcomes the current limitations of statistical rule-based methods and allows a physical understanding of the nucleation and temporal evolution of such faults. In particular, we formulate the coupling between temperature and pressure evolution in the faults through their multiphysics energetic process(es). We analyse their multiple steady states using numerical continuation methods and characterise their transient dynamics by studying the time-dependent problem near the critical Hopf points. We find that the global system can be characterised by a homoclinic bifurcation that depends on the two main dimensionless groups of the underlying physical system. The Gruntfest number determines the onset of the localisation phenomenon, while the dynamics are mainly controlled by the Lewis number, which is the ratio of energy diffusion over mass diffusion. Here, we show that the Lewis number is the critical parameter for dynamics of the system as it controls the time evolution of the system for a given energy supply (Gruntfest number).

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“…The integration in time is implicit using the solver provided by Redback [5] (Moose framework). In Fig.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…The mathematical system is then integrated numerically in order to study the post-bifurcation regime of the problem [4]. The numerical simulations are performed using the FE code called Redback [5]. The numerical analyses permit to verify and to complete the theoretical predictions [8] in the post-bifurcation regime for a fault gouge under THM couplings.…”

Section: Introductionmentioning

confidence: 99%

Localisation of Deformation for Shearing of a Fault Gouge with Cosserat Microstructure and Different Couplings

Rattez

Stefanou

Sulem

et al. 2017

Springer Series in Geomechanics and Geoengineering

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In this paper, we show the impact of Thermo-Hydro Mechanical couplings (THM) on the stability of a saturated fault gouge under shear. By resorting to Cosserat continuum mechanics, that allows to take into account rotational degrees of freedom, we regularize the problem of localisation and we predict the thickness of a shear band. A linear stability analysis of the homogeneous state is performed and then the system of equations is integrated using a Finite Element (FE) analysis. These analyses can be used for studying the evolution of the thickness of the principal slip zone in a fault under undrained adiabatic shear. Good agreement is found between theoretical predictions and field observations.

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Multi-Physics Modelling of Fault Mechanics Using REDBACK: A Parallel Open-Source Simulator for Tightly Coupled Problems

Cited by 50 publications

References 36 publications

The importance of Thermo-Hydro-Mechanical couplings and microstructure to strain localization in 3D continua with application to seismic faults. Part II: Numerical implementation and post-bifurcation analysis

The importance of Thermo-Hydro-Mechanical couplings and microstructure to strain localization in 3D continua with application to seismic faults. Part II: Numerical implementation and post-bifurcation analysis

Analysis of Dynamics in Multiphysics Modelling of Active Faults

Localisation of Deformation for Shearing of a Fault Gouge with Cosserat Microstructure and Different Couplings

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