.. _sphx_glr_gallery_elements_shell181:

SHELL181 gallery
================

Runnable SHELL181 (4-node shell) examples.


.. raw:: html

  <div id='sg-tag-list' class='sphx-glr-tag-list'></div>


.. raw:: html

    <div class="sphx-glr-thumbnails">

.. thumbnail-parent-div-open

.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="The 4-node flat Mindlin–Reissner shell maps to the natural coordinates (\xi, \eta) \in [-1, 1]^2 and carries six DOFs per node — three translations (u_x, u_y, u_z) plus three rotations (\theta_x, \theta_y, \theta_z) — for 24 DOFs per element.">

.. only:: html

  .. image:: /gallery/elements/shell181/images/thumb/sphx_glr_example_quad4_shell_reference_geometry_thumb.png
    :alt:

  :doc:`/gallery/elements/shell181/example_quad4_shell_reference_geometry`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">QUAD4 shell reference geometry — Mindlin–Reissner shape functions</div>
    </div>


.. raw:: html

    <div class="sphx-glr-thumbcontainer" tooltip="Single QUAD4_SHELL element (a 1 m × 1 m flat plate of thickness t) in pure in-plane tension. Out-of-plane DOFs are suppressed so the problem reduces to plane-stress membrane behaviour: u_x = σ L / E and the Poisson contraction u_y = −ν u_x.">

.. only:: html

  .. image:: /gallery/elements/shell181/images/thumb/sphx_glr_example_shell181_thumb.png
    :alt:

  :doc:`/gallery/elements/shell181/example_shell181`

.. raw:: html

      <div class="sphx-glr-thumbnail-title">QUAD4_SHELL — uniaxial stretch of a flat square plate</div>
    </div>


.. thumbnail-parent-div-close

.. raw:: html

    </div>


.. toctree::
   :hidden:

   /gallery/elements/shell181/example_quad4_shell_reference_geometry
   /gallery/elements/shell181/example_shell181