.. _V3.05.102:

**v3.05.102** SSLX102 - Bent bent pipe
=====================================================

**Summary:**

This test validates the modeling of ovalization phenomena in pipes: an elbow, extended by straight pipes, is subjected to a bending moment. This causes an ovalization in the elbow that spreads and is damped in the parts straight, and which changes the stiffness of the entire pipe. To verify the accuracy of the results, we test the flexibility of the entire pipe (value of the displacement at the end for a given moment) and the shell elements DKT are tested.

The test case includes six models:


* For modeling A, the elbow is meshed into shells (modeling DKT), pipe modeling is used for the parts straight, the connection is ensured by a COQUE_TUYAU connector.


* For B and C models, modeling TUYAU is assigned to the entire pipe: TUYAU_3M for B and TUYAU_6M for C (:math:`M` = Fourier modes).


* In D modeling, the pipe is meshed into shells (elements COQUE_3D), the ends are meshed into beams to apply the loads.


* E modeling: Modeling TUYAU (3 Fourier modes) is assigned to the entire pipeline.


* For the F modeling, the elbow is meshed into solid meshes, the parts are meshed into TUYAU elements, and the connection is ensured by a 3D_ TUYAU connection.

Modeling A validates the good transmission of the ovalization (mode 2) between the elements TUYAU, and validates the connection COQUE_TUYAU, the two models B and C make it possible to validate the elements TUYAU (with 3 and 6 Fourier modes) in linear elasticity and the last modeling makes it possible to validate the good transmission of the ovalization (mode 2) between the elements TUYAU, and validates the connection 3D_ TUYAU.


.. toctree::
    :hidden:

    self

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

    Probl_me_de_r_f_rence
    Solution_de_r_f_rence
    Mod_lisation_A
    Mod_lisation_B
    Mod_lisation_C
    Mod_lisation_D
    Mod_lisation_E
    Mod_lisation_F
    Synth_se_des_r_sultats