@article{fdi:010057043,
  title = {{E}ffective friction law for small-scale fault heterogeneity in 3{D} dynamic rupture},
  author = {{L}atour, {S}. and {C}ampillo, {M}. and {V}oisin, {C}hristophe and {I}onescu, {I}. {R}. and {S}chmedes, {J}. and {L}avallee, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e address the problem of modeling dynamic rupture on multiscale heterogeneous faults in 3{D}. {U}nder the assumption of slip-weakening friction, we numerically construct effective friction laws that integrate the effects of small-scale heterogeneity during the rupture. {T}his homogenization process is based on the description of the initial phase of the rupture by the dominant unstable spectral mode. {I}ts dynamics is influenced by the geometry of the fault, the static friction heterogeneities and the friction law. {W}e first define a periodic small-scale heterogeneous model, introducing heterogeneity in the distribution of the static friction coefficient. {W}e then describe a method for constructing this effective friction law. {A}pplying this new law homogeneously on the fault permits to reproduce the dynamic evolution of the heterogeneous fault. {F}urthermore, we show that the effective friction law can be used to replace small-scale heterogeneities in two-scale heterogeneous models, while preserving their effects. {W}e study three kinds of two-scale models, with growing complexity: first periodic at both scales, then periodic only at small scale, and finally irregular at both scales. {T}his homogenization method can be adapted to the case where the heterogeneity is introduced in the initial stress rather than in the static friction value. {F}inally, we show in a simple example that the effective friction law permits to reproduce the transition between subshear and supershear rupture propagation, originally produced by heterogeneities on the fault.},
  keywords = {},
  booktitle = {},
  journal = {{J}ournal of {G}eophysical {R}esearch. {S}olid {E}arth},
  volume = {116},
  numero = {},
  pages = {{B}10306},
  ISSN = {0148-0227},
  year = {2011},
  DOI = {10.1029/2010jb008118},
  URL = {https://www.documentation.ird.fr/hor/fdi:010057043},
}