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Tamaas (from تماس meaning "contact" in Farsi) is a high-performance rough-surface periodic contact code based on boundary and volume integral equations. The clever mathematical formulation of the underlying numerical methods allows the use of the fast-Fourier Transform, a great help in achieving peak performance: Tamaas is consistently two orders of magnitude faster (and lighter) than traditional FEM!

This means we can tackle such difficult problems as elastoplastic contact of rough surfaces with upwards of 100 million degrees-of-freedom on a single compute node. The image below shows the plastic zone in the material bulk for such a simulation:

© 2019, Laboratoire de Simulation en Mécanique des Solides, EPFL.

Their are a few repositories available under the umbrella of the project:

  • rTAMAAS: the main trunk containing the latest source code
  • rEXPOLIT: a helper library for symbolic integration at compile time in C++

Online documentation can be found on To give proper credit to Tamaas and the researchers who have developed the numerical methods that it implements, please cite the JOSS paper and the appropriate references therein.

Event Timeline

anciaux created this project.Sep 11 2017, 16:26
anciaux added a member: rezzonico.
anciaux added a member: varini.
anciaux added a member: fourestey.
anciaux added a member: culpo.
anciaux added a member: richart.
frerot changed the visibility from "Project Members" to "Custom Policy".Sep 25 2017, 10:06
frerot changed the edit policy from "Project Members" to "Custom Policy".
frerot added a member: rey.Nov 10 2017, 08:24
anciaux changed the visibility from "Custom Policy" to "Public (No Login Required)".Apr 1 2019, 09:55
frerot added hashtags: #contat, #highperformance, #fft.
frerot removed hashtags: #contat, #highperformance, #fft.Apr 1 2019, 11:30
frerot set this project's image to F10738590: profile.Apr 1 2019, 13:02
frerot updated this project's image from F10738590: profile to F10738591: profile.
frerot updated this project's image from F10738591: profile to F10738597: profile.
frerot updated this project's image from F10738597: profile to F10738600: profile.Apr 1 2019, 13:05
frerot updated this project's image from F10738600: profile to F10738722: profile.Apr 1 2019, 13:58
frerot updated this project's image from F10738722: profile to F10738740: profile.Apr 1 2019, 14:03
frerot updated this project's image from F10738740: profile to F10738779: profile.Apr 1 2019, 14:13
frerot updated this project's image from F10738779: profile to F10738782: profile.
frerot added a member: berardini.
frerot set this project's color to Grey.Oct 3 2019, 12:35
frerot set this project's color to Green.
frerot edited Description. (Show Details)
frerot edited Description. (Show Details)