FRIC2D

A boundary element code for investigating frictional faults in two dimensions. The code incorporates the development of secondary fractures associated with fauting and fracture propagation by tensile failure.

 

Frictional slip along faults (prescribe tolerance and iteration limit for convergence) Friction evolves from static to dynamic values over a presribed slip weakening distance Development of tensile failure along fautls where max principal tension exceeds tensile strength (e.g. regions of slip gradient) Propagation by tensile failure at opening or mixed-mode fracture tips

• FRIC2D version 3.2.8 modified October 2016 ftp site
• FRIC2D version 1 documentation in HTML format (documentation doesn't not describe recent updates to Fric2D but provides abundant information on set up of input files and how the code works)
• Original development of iterative frictional slip was added to the code TWODD that investigated opening mode fracture propagation
  • Cooke, Michele L. and David D. Pollard, 1997. Bedding plane slip in initial stages of fault-related folding Journal of Structural Geology Special Issue on Fault-Related Folding, vol. 19, pp. 567-581.
• Development of tensile damage along faults
• Cooke, Michele L., 1997.  Fracture localization along faults with spatially varying friction, Journal of Geophysical Research, vol. 102, pp. 22,425-22,434.
• Incorporation of slip weakening
• Savage, Heather M. and Michele L. Cooke, 2010. Unlocking the effects of friction on fault damage zones, Journal of Structural Geology, 1732-1741, doi:10.1016/j.jsg.2009.08.014.

Sandbox

A boundary element code for investigating cross-sectional deformation of frictional faults in two dimensions with arbitrary topography. The code has the same functionality of Fric2d and superposes lithostatic loading due to arbitrary topography before finding the solution to the boundary value problem.<

Includes all features of Fric2d listed above Incorporates arbitrary topography specified within a separate topography file ( x_loc y_loc)

• Version 3.1 June 2016 (consistent with fric2d 3.2.7) ftp site
• Del Castello, Mario and Michele L. Cooke, 2007. Underthrusting-accretion cycle: Work budget as revealed by the boundary element method, Journal of Geophysical Research, 112, B12404, doi:10.1029/2007JB004997.

GROW: GRowth by Optimization of Work

A model tool that grows faults by searching for the propagation path that optimizes external work

The code is a perl script wrapper around the Boundary Element Method code FRIC2D that run successive models to explore the fault propagation path that minimizes external work. This software was written by Jess McBeck for her MS thesis.

• The latest version of GROW is posted on Github along with sample files and User manual.
• GROW user's manual (pdf) written by Jess McBeck
• When using please cite:
  • McBeck, Jessica, Elizabeth H. Madden and Michele L. Cooke, 2016. Growth by Optimization of Work (GROW): A new modeling tool that predicts fault growth through work minimization, Computers and Geoscience, 10.1016/j.cageo.2015.12.019

Other tools available by request

We have a variety of scripts and modified versions of codes to address specific problems. If you are interested in the tools listed below conact Michele Cooke.

• Fric2d_SW tracks the evolution of deformation with propagation of a slip event.
  • Savage, Heather M. and Michele L. Cooke, 2010. Unlocking the effects of friction on fault damage zones, Journal of Structural Geology, 1732-1741, doi:10.1016/j.jsg.2009.08.014.
• Veins simulates the effects of fluid pressure on deformation of fractures
• Scripts to calculate work components. We have developed a variety of perl scripts that track the evolution of external work, frictional work, work against gravity within modeled sysste.