.. _R3.08.09:

**r3.08.09** Multi-fiber beams in large movements
=========================================================

**Summary:**

This document presents the treatment of large displacements of the multi-fiber beam element POU_D_TGM activated by the keyword DEFORMATION =' GROT_GDEP '.

It makes it possible to combine both material nonlinearity (description of the fiber section) and geometric nonlinearity. The description of major movements remains approximate and assumes small time steps.

This element is suitable for characterizing the ruin of truss structures.

Note1: The treatment of large displacements for the other beam elements is described in [:ref:`R3.08.01 <R3.08.01>`].

Note2: The keyword RIGI_GEOM =' OUI 'makes it possible to deactivate the particular treatment of large displacements and aims to write the balance of the beam on the deformed configuration.


.. _Ref390748768:




.. toctree::
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    self

.. toctree::
    :maxdepth: 2
    :numbered:

    Position_du_probl_me
    Notations
    Pr_sentation_de_la_d_marche
    Description_th_orique_de_l__l_ment
    Impl_mentation_dans_Code_Aster
    Validation
    Bibliographie