.. _R3.08.03:

**r3.08.03** Calculation of the characteristics of a beam of any cross section
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**Summary:**

The principle of calculating the various characteristic quantities of beam sections is presented. These are established from the geometric characteristics of the cross section of the beam.

These values are to be provided to operand SECTION: 'GENERALE' of operator AFFE_CARA_ELEM [:external:ref:`U4.42.01 <U4.42.01>`]. To determine them, numerical methods are presented, and implemented in command MACR_CARA_POUTRE.

In the case of sections' RECTANGLE 'and' CERCLE ', the characteristics are calculated directly in AFFE_CARA_ELEM using simplified formulas that are explained here.




.. toctree::
    :hidden:

    self

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

    Les_caract_ristiques_g_om_triques
    Les_coefficients_de_cisaillement_et_le_centre_de_cisaillement
    Les_constantes_li_es___la_torsion
    Calcul_de_la_constante_de_gauchissement
    Bibliographie