Modeling A
==============


Characteristics of modeling
-----------------------------------

The 0.25 m long double-supported structure, extending between X = -0.1 m and X = 0.15 m, is connected in volume in the zone of overlap, which extends between the positions 0.0 m and 0.05 m, to a 3D model by the 3D option POU_ARLEQUIN of the keyword LIAISON_ELEM of the operator AFFE_CHAR_MECA.

It is modelled by Timoshenko beam elements (POU_D_T) and linear solid elements (PENTA6 and HEXA8).


.. image:: images/10000200000004B5000001D8F3159758216CC258.png
    :width: 2.9091in
    :height: 1.3154in


.. _RefImage_10000200000004B5000001D8F3159758216CC258.png:

**Image** 3.1-1 **: 3D volume model mesh**

DYNA_LINE_TRAN calculate the dynamic response of the structure for 3 s, due to a nodal force with a value equal to 100 N on the 3D mesh node located at X = 0.02 m.


Characteristics of the mesh
----------------------------


.. csv-table::

    "Number of stitches HEXA8 ", "150"
    "Number of stitches PENTA6 ", "50"
    "Number of stitches POU_D_T ", "20"


**Table** 3.2-1


Tested sizes and results
------------------------------

The tables below give the numerical values tested in this test case. These are the minimum and maximum movements in Z of a 3D mesh node located at X = 0.04 m.


.. csv-table::

    "**Identification**", "**Maximum instants**", "**Reference type**", "**Reference value**", "**Tolerance**"
    "Minimal Z displacement", "2.205 s", "'AUTRE_ASTER'", "-0.00033054"," 7.00%"
    "Maximum Z displacement", "2,700 s", "'AUTRE_ASTER'", "+0.00033065"," 7.00%"


**Table** 3.3-1 **: Summary of tested results**

The responses of the 1D and mixed 1D-3D models of the structure are represented on the graph below.


.. image:: images/100002000000030D0000024CD9F1C8DD04E4A2A9.png
    :width: 5.5071in
    :height: 2.6992in


.. _RefImage_100002000000030D0000024CD9F1C8DD04E4A2A9.png:

**Image** 3.3-2 **: Responses of 1D and mixed 1D-3D models**