dynamics (2D)
'''''''''''''

:Sources:

.. collapse:: dynamics.py (click to expand)

.. literalinclude:: examples/python/solid_mechanics_model/dynamics/dynamics.py
:language: python
:lines: 9-

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

.. literalinclude:: examples/python/solid_mechanics_model/dynamics/material.dat
:language: text

:Location:

``examples/python/solid_mechanics_model/`` `dynamics <https://gitlab.com/akantu/akantu/-/blob/master/examples/python/solid_mechanics_model/dynamics/>`_

In ``dynamics``, an example of a dynamic simulation solved with an explicit time intergration is shown. This examples
model the propagation of a wave in a bar. The geometry is depicted in :numref:`fig-ex-dynamics_geom`. A pulse is impose
as an initial displacement over the bar. Results are depicted in :numref:`fig-ex-dynamics_displ`.

The explicit time integration scheme is set with:

.. code-block:: python

model.initFull(_analysis_method=aka._explicit_lumped_mass)

This example shows how to create a new functor to set the boundary conditions. This is done by creating a class that inherits from ``aka.FixedValue`` (``MyFixedValue(aka.FixedValue)`` in this case).
The boundary conditions are then applied with:

.. code-block:: python

model.applyBC(MyFixedValue(0, aka._x), "XBlocked")
model.applyBC(MyFixedValue(0, aka._y), "YBlocked")

.. _fig-ex-dynamics_geom:
.. figure:: examples/python/solid_mechanics_model/dynamics/images/bar_geom.svg
:align: center
:width: 70%

Plate with a hole geometry.

.. _fig-ex-dynamics_displ:
.. figure:: examples/python/solid_mechanics_model/dynamics/images/bar.gif
:align: center
:width: 70%

Displacement magnitude.