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

Abstract

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

Controlling Anthropogenic and Natural Seismicity: Insights From Active Stabilization of the Spring‐Slider Model

“…Nevertheless, its thickness is linked with the softening response of the system, that is, the reduction of friction in function of slip, rate of slip, and other variables related to multiphysical couplings. This region of extreme shearing usually consisted of ultracataclastic materials, and it has a complex structure (Ben‐Zion & Sammis, ; Brodie et al, ) due to various physicochemical phenomena that take place during preseismic slip and coseismic slip (see Anthony & Marone, ; Rattez et al, , , ; Reches & Lockner, ; Scuderi et al, ; Tinti et al, , among others). As a result, the apparent friction, F , does not depend only on the extent and the rate of slip, but also on the evolution of the microstructural network, the grain size, the presence and pressure of interstitial fluids, the temperature, time (state) and the reactivation of chemical reactions (Brantut & Sulem, ; Veveakis et al, , , among others).…”

“…Nevertheless, its thickness is linked with the softening response of the system, that is, the reduction of friction in function of slip, rate of slip, and other variables related to multiphysical couplings. This region of extreme shearing usually consisted of ultracataclastic materials, and it has a complex structure (Ben-Zion & Sammis, 2003;Brodie et al, 2007) due to various physicochemical phenomena that take place during preseismic slip and coseismic slip (see Anthony & Marone, 2005;Rattez et al, 2018aRattez et al, , 2018bRattez et al, , 2018cReches & Lockner, 2010;Scuderi et al, 2017;Tinti et al, 2016, among others). As a result, the apparent friction, F, does not depend only on the extent and the rate of slip, , v = .…”

Weak phases production and heat generation control fault friction during seismic slip

“…However, in natural conditions faults are rarely dry and are usually saturated with pressurized fluids, a scenario difficult to study experimentally at high velocity 13 . The presence of fluids can trigger other mechanisms like cavitation 29 , pressure-solution [30][31][32] , or thermal pressurization [33][34][35][36] . The addition of such mechanisms could in turn either change the steady state response of the system or induce transients which could drive the system far from its steady-state response 22,37 .…”

Multiphysics Modeling of a Brittle‐Ductile Lithosphere: 2. Semi‐brittle, Semi‐ductile Deformation and Damage Rheology

“…In order to describe the physics behind these observations, different modeling approaches have been developed over the last decades, including Cosserat continuum (Rattez, Stefanou, & Sulem, ; Rattez, Stefanou, Sulem, Veveakis, et al, ), different flavors of capped plastic models (Grueschow & Rudnicki, ; Poulet & Veveakis, ; Rutter & Glover, ), phase field approaches (Bryant & Sun, ; Sun et al, ), a poro‐visco‐elasto‐plastic model including a bulk viscosity by Yarushina and Podladchikov (), and damage rheologies (Hamiel, Liu, et al, ; Hamiel, Lyakhovsky, et al, ; Karrech et al, , ; Lemaitre, ; Lyakhovsky et al, ). Common to all these efforts is to arrive at a consistent integration of micromechanical aspects into a macroscale averaged constitutive model of the rock sample.…”

“…Developing a physical framework relevant to these applications requires accounting for diverse spatial and time scales over which to describe the coupling and non-linearities between the different physical processes while relying on observations, whether from laboratory experiments or geological observations. In order to describe the physics behind these observations, different modeling approaches have been developed over the last decades, including Cosserat continuum Rattez, Stefanou, Sulem, Veveakis, et al, 2018), different flavors of capped plastic models (Grueschow & Rudnicki, 2005;Poulet & Veveakis, 2016;Rutter & Glover, 2012), phase field approaches (Bryant & Sun, 2018;Sun et al, 2011), a poro-visco-elasto-plastic model including a bulk viscosity by Yarushina and Podladchikov (2015), and damage rheologies (Hamiel, Liu, et al, 2004;Karrech et al, 2011Karrech et al, , 2011Lemaitre, 1985;Lyakhovsky et al, 1993). Common to all these efforts is to arrive at a consistent integration of micromechanical aspects into a macroscale averaged constitutive model of the rock sample.…”