Scalability test (3D)
`````````````````````

:Sources:

.. collapse:: cohesive_extrinsic.cc (click to expand)

.. literalinclude:: examples/c++/scalability_test/cohesive_extrinsic.cc
:language: c++
:lines: 20-

.. collapse:: material-elastic.dat (click to expand)

.. literalinclude:: examples/c++/scalability_test/material-elastic.dat
:language: text

:Location:

``examples/c++/`` `scalability_test <https://gitlab.com/akantu/akantu/-/blob/master/examples/c++/scalability_test>`_

This example is used to do scalability test, with elastic material or cohesive elements inserted on the fly.
The `cube.geo` should generate a mesh with roughly 4'500'000 elements and 730'000 nodes. The `cube.msh` file included is a `tiny` cube only to test if the code works.

To run the full simulation the full mesh has to be generated `gmsh -3 cube.geo -o cube.msh`

The simulation consist of a cube with a compressive force on top and a shear force on four sides as shown in the figure bellow

.. figure:: examples/c++/scalability_test/images/cube.svg
:align: center
:width: 60%

This examples was used to run the scalability test from the JOSS paper the
full mesh and results presented in the following graph can be found here:
`perf-test-akantu-cohesive
<https://gitlab.com/akantu/performance-testing-cohesive/-/tree/publications/joss?ref_type=tags>`_

.. figure:: examples/c++/scalability_test/images/TTS.svg
:align: center
:width: 60%