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#1 2010-12-27 18:54:34

rcbsimoes
Member
Registered: 2010-12-09
Posts: 41

Which "Maille"

Dear All,

when one uses SMESH (module in Salome) to mesh an imported solid,

which maille (tetra4 tetra10 etc etc) does one get, when:

one uses "Automatic Tetrahedralization".??
one uses "Automatic Hexahedralization".??
or what ever other options available...

not sure if i understood the affe_mode.
this keyword should be used to define one, but SMESH already defines one for me?
when we use "MECANIQUE" + "3D", we don't define a maille do we, code aster uses the SMESH one?
is this it??

greetings
rui

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#2 2010-12-27 21:23:48

Claws
Member
From: Denmark
Registered: 2009-03-23
Posts: 375

Re: Which "Maille"

For surfaces: when you use auto. tetra. you get TRIA3, if converted to a quadratic mesh you end up with TRIA6
When you use auto. hexa. you get QUAD4, if converted to a quadratic mesh you end up with QUAD8

TETRA4 and HEXA8 with volumes -> TETRA10 and HEXA20 with quadratic elements.

I think what you're referring to with AFFE_MODI etc. is a misunderstanding. There are (several) ways ASTER can manipulate with a loaded mesh: convert it from a linear to a quadratic mesh (eg. TRIA4 -> TRIA10) with CREA_MAILLAGE -> LINE_QUAD. That way you don't have to do it in Salomé - it can save a lot of memory to do it in ASTER, or you might not even have enough memory to do it in Salomé.

2nd: ASTER can convert TRIA6 and QUAD8 to TRIA7 and QUAD9 - i.e. create a node in the middle of a face - this is necessary to use e.g. COQUE_3D elements.
This is done under CREA_MAILLAGE -> MODI_MAILLE: TRIA6_7, QUAD8_9.

ASTER will read and use the mesh created in Salomé or other, and determine what elements it has upon loading.

Hope this clears it up for you :)

Regards

Claus


Opensuse 15
http://www.caelinux.org/wiki/index.php/Contrib:Claws/Code_Aster

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#3 2010-12-27 23:45:22

rcbsimoes
Member
Registered: 2010-12-09
Posts: 41

Re: Which "Maille"

thanks Mr Claus,

clearer now.
rui

ps. I meant "AFFE_MODELE".

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