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Correct typo in pair_granular.rst #1800

merged 1 commit into from Jan 6, 2020


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jibril-b-coulibaly commented Dec 6, 2019


The documentation states that tangent stiffness k_t equals 8G, instead of 4G/(2-\nu).
The calculation performed by PairGranular::mix_stiffnessG() is correct, this patch only corrects the typo in the documentation.

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Jibril B. Coulibaly, Northwestern University


By submitting this pull request, I agree, that my contribution will be included in LAMMPS and redistributed under either the GNU General Public License version 2 (GPL v2) or the GNU Lesser General Public License version 2.1 (LGPL v2.1).

Backward Compatibility

No backward compatibility issue

Implementation Notes

The value of k_t = 4G/(2-\nu) is consistent with the literature (e.g. Radjaï and Dubois, 2011, ISBN: 978-1-848-21260-2), and with what the documentation of the pair style gran_hooke states.

Post Submission Checklist

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  • The feature or features in this pull request is complete
  • Licensing information is complete
  • Corresponding author information is complete
  • The source code follows the LAMMPS formatting guidelines
  • Suitable new documentation files and/or updates to the existing docs are included
  • The added/updated documentation is integrated and tested with the documentation build system
  • The feature has been verified to work with the conventional build system
  • The feature has been verified to work with the CMake based build system
  • A package specific README file has been included or updated
  • One or more example input decks are included

Further Information, Files, and Links

Correct formula for tangent stiffness, consistent with `PairGranular::mix_stiffnessG()`
@akohlmey akohlmey requested review from athomps and sjplimp Dec 17, 2019
@akohlmey akohlmey self-assigned this Dec 17, 2019
@sjplimp sjplimp requested review from dsbolin and removed request for athomps Dec 19, 2019
@akohlmey akohlmey merged commit 0dda120 into lammps:master Jan 6, 2020
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