[ GiDlist ] interface elements

[Miguel A. de Riera Pasenau]

Hello,

when meshing inside GiD, all the elements must be quadratic or not.
That is, you can not mix 2 node linear elements with quadratic elements
( 3 node triangles or 4 node quadrilaterals).
But you can mix 3 node linear elements ( 2 nodes at the end of the line +
+ one in the middle) and quadratic elements ( 6 node triangles or 8/9 node
quadrilaterals). Or you can mix 2 node linear elements and non quadratic
elements ( 3 node triangles or 4 node quadrilaterals).
To achieve this, after selecting the element type you want for the surfaces,
you must be also tell GiD to mesh the lines:
select 'Meshing-Mesh criteria-Mesh-Lines' in the menu bar and
click over the lines from the geometry from which you want the line elements.

One way to get what you want is to mesh your model with elements ( 3 node lines
and 6 node triangles or 8/9 node quadrilaterals), and then
in your problem type ( .bas) transform each 3 node linear element into two
2 node lines.

Hope it helps

miguel

Aldo Ghisi wrote:

Hi,

is it possible to implement interface elements with GiD? I mean i.e. a
linear element with 2 nodes at each extremum that are each one connected to
the nodes of quadratic elements nearby.
Thank you in advance.

ALDO GHISI
Department of Structural Engineering
Politecnico di Milano
Piazza Leonardo da Vinci 32, 20133 Milano, Italy
Tel.: +39 02 2399 4218
Fax.: +39 02 2399 4220
E_mail: aldo.ghisi at polimi.it

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Miguel A. de Riera Pasenau miguel at cimne.upc.es http://gid.cimne.upc.es