.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "examples/gallery_examples/00-mapdl-examples/contact_elements.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        :ref:`Go to the end <sphx_glr_download_examples_gallery_examples_00-mapdl-examples_contact_elements.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_examples_gallery_examples_00-mapdl-examples_contact_elements.py:


.. _ref_contact_example:

Contact Element Example
~~~~~~~~~~~~~~~~~~~~~~~

This example demonstrates how to create contact elements for general
contact.

Begin by launching MAPDL.

.. GENERATED FROM PYTHON SOURCE LINES 35-39

.. code-block:: Python

    from ansys.mapdl import core as pymapdl

    mapdl = pymapdl.launch_mapdl()








.. GENERATED FROM PYTHON SOURCE LINES 40-43

Enter the pre-processor, create a block and mesh it with tetrahedral
elements.


.. GENERATED FROM PYTHON SOURCE LINES 43-53

.. code-block:: Python

    mapdl.prep7()

    vnum0 = mapdl.block(0, 1, 0, 1, 0, 0.5)

    mapdl.et(1, 187)
    mapdl.esize(0.1)

    mapdl.vmesh(vnum0)
    mapdl.eplot()




.. image-sg:: /examples/gallery_examples/00-mapdl-examples/images/sphx_glr_contact_elements_001.png
   :alt: contact elements
   :srcset: /examples/gallery_examples/00-mapdl-examples/images/sphx_glr_contact_elements_001.png
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 54-59

Second a volume block above the existing block and mesh it with
quadratic hexahedral elements.  Ensure that these blocks do not
touch by starting it slightly higher than the existing block.

Note how these two blocks do not touch and the mesh is non-conformal.

.. GENERATED FROM PYTHON SOURCE LINES 59-68

.. code-block:: Python


    mapdl.esize(0.09)
    mapdl.et(2, 186)
    mapdl.type(2)
    vnum1 = mapdl.block(0, 1, 0, 1, 0.50001, 1)
    mapdl.vmesh(vnum1)
    mapdl.eplot()





.. image-sg:: /examples/gallery_examples/00-mapdl-examples/images/sphx_glr_contact_elements_002.png
   :alt: contact elements
   :srcset: /examples/gallery_examples/00-mapdl-examples/images/sphx_glr_contact_elements_002.png
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 69-71

Select all the elements at the intersection between the two blocks
and generate contact elements.

.. GENERATED FROM PYTHON SOURCE LINES 71-77

.. code-block:: Python


    mapdl.nsel("s", "loc", "z", 0.5, 0.50001)
    mapdl.esln("s")
    output = mapdl.gcgen("NEW", splitkey="SPLIT", selopt="SELECT")
    print(output)





.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    GENERATE GENERAL CONTACT ELEMENTS
         FEATURE ANGLE FOR SURFACE SPLITTING =   42.0 DEGREES
         ASSIGN SECNUM BASED ON SPLIT SURFACES
         USE EXTERIOR FACES OF SELECTED ELEMENTS ONLY
 
         Number of general CONTA174 elements created =       366
              on exterior faces of 3D solid base elements
         New general contact elements have Section ID from     3 to     4




.. GENERATED FROM PYTHON SOURCE LINES 78-83

Plot the contact element pairs.  Note from the command output above
that the section IDs are 5 and 6.

Here, we plot the element mesh as a wire-frame to show that the
contact pairs overlap.

.. GENERATED FROM PYTHON SOURCE LINES 83-87

.. code-block:: Python


    mapdl.esel("S", "SEC", vmin=3, vmax=4)
    mapdl.eplot(style="wireframe", line_width=3)




.. image-sg:: /examples/gallery_examples/00-mapdl-examples/images/sphx_glr_contact_elements_003.png
   :alt: contact elements
   :srcset: /examples/gallery_examples/00-mapdl-examples/images/sphx_glr_contact_elements_003.png
   :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 88-91

Stop mapdl
~~~~~~~~~~


.. GENERATED FROM PYTHON SOURCE LINES 91-92

.. code-block:: Python

    mapdl.exit()








.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 2.013 seconds)


.. _sphx_glr_download_examples_gallery_examples_00-mapdl-examples_contact_elements.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: contact_elements.ipynb <contact_elements.ipynb>`

    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: contact_elements.py <contact_elements.py>`