Stress estimation around faults : a comparison of various structural representations and mechanical behaviors Behavior laws

Antoine Mazuyer and Richard Giot and Paul Cupillard and Marianne Conin and Benjamin P. Chauvin and Pierre Thore. ( 2017 )
in: 2017 RING Meeting, pages 1--12, ASGA

Abstract

Faults widely disturb the stress eld around them. In this paper we study the diferent structural representations of faults and how the associated mechanical behavior in uences the stress eld. The rst representation is a surface that models the discontinuity. It is associated with a frictionnal contact behavior. The second representation is a volume with a fault core and a damage zone with speci c mechanical properties. We compare how the choice of models and parameters a ects the stress eld. The combination of the two representations is also studied. A simple 3D model composed of a single fault embedded in a homogeneous material is used to compare the two fault representations and their combination. The paper focuses then on the principal stress magnitudes and orientations evolution in the domain following a small perturbation applied on one boundary. The mechanical problem is solved using a Finite Element code that implements frictionnal contact conditions and linear elasticity behavior.

Download / Links

BibTeX Reference

@INPROCEEDINGS{Mazuyer2017,
    author = { Mazuyer, Antoine and Giot, Richard and Cupillard, Paul and Conin, Marianne and Chauvin, Benjamin P. and Thore, Pierre },
     title = { Stress estimation around faults : a comparison of various structural representations and mechanical behaviors Behavior laws },
 booktitle = { 2017 RING Meeting },
      year = { 2017 },
     pages = { 1--12 },
 publisher = { ASGA },
  abstract = { Faults widely disturb the stress eld around them. In this paper we study the diferent structural representations of faults and how the associated mechanical behavior in uences the stress eld. The rst representation is a surface that models the discontinuity. It is associated with a frictionnal contact behavior. The second representation is a volume with a fault core and a damage zone with speci c mechanical properties. We compare how the choice of models and parameters a ects the stress eld. The combination of the two representations is also studied. A simple 3D model composed of a single fault embedded in a homogeneous material is used to compare the two fault representations and their combination. The paper focuses then on the principal stress magnitudes and orientations evolution in the domain following a small perturbation applied on one boundary. The mechanical problem is solved using a Finite Element code that implements frictionnal contact conditions and linear elasticity behavior. }
}