stiffness_matrix (2D)
'''''''''''''''''''''

:Sources:

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

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

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

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

:Location:

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


``stiffness_matrix`` shows how to get the stiffness matrix from a mesh. It is done with::
model.assembleStiffnessMatrix()
K = model.getDOFManager().getMatrix('K')
stiff = aka.AkantuSparseMatrix(K).toarray()