Published July 5, 2024 | Version 2.8.0
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Tamaas, a high-performance library for periodic rough surface contact

  • 1. ROR icon Institut Jean Le Rond d'Alembert
  • 2. ROR icon École Polytechnique Fédérale de Lausanne
  • 3. ROR icon Johns Hopkins University
  • 4. ROR icon University of Freiburg
  • 5. ROR icon Institut de Recherche en Génie Civil et Mécanique


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 (and more with MPI distributed parallelism).

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 (see README below for selected references).

Tamaas is under active development on GitLab.


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Additional details

Related works

Is derived from
Journal article: 10.1016/j.cma. 2019.04.006 (DOI)
Is supplement to
Journal article: 10.21105/joss.02121 (DOI)


Contact mechanics of rough surfaces 200021_162569
Swiss National Science Foundation
Tribology of Polymers: from Atomistic to Continuum Scales P2ELP2_191720
Swiss National Science Foundation


Repository URL
Programming language
C++, Python
Development Status