[Gmsh] Variable thickness surface

Julian julian.henneberg at googlemail.com
Mon Mar 30 12:57:06 CEST 2020


I am using gmsh for modelling 2D components and I am trying to find out how
I can set a thickness to the plate/shell elements. First I was thinking
about assigning regions of different thicknesses to different physical
groups but by this approach I can specify only a constant value which is
not what I need.

According to this conversation from the mailing list it should be possible.

> Hi Mathieu,
> Have a look at the Gmsh Tutorial 7:
> http://geuz.org/gmsh/doc/texinfo/gmsh.html#t7_002egeo
> Ruth
> Dr. Ir. Ruth V. Sabariego
> University of Liege, Electrical Engineering & Computer Science,
> Applied & Computational Electromagnetics (ACE),
> phone: +32-4-3663737 - fax: +32-4-3662910 -
> http://ace.montefiore.ulg.ac.be/

On 13 Oct 2011, at 12:27, Mathieu ARQUIER wrote:
> Hello,
> First of all, thank you very much for developing GMSH !!! I used it for
> several years now as pre-processor to create meshes for my structural
> calculation software and it works very well :).
> Now, I want to go further and would like to create variable thickness
> shell elements. So, I was wondering if there is a way to interpolate a
> scalar field inside a 2D meshed surfaced (i.e. the thickness) ? Basically,
> I want to define a surface with a variable thickness (let's say I know the
> value at some nodes of its border), and, once the meshing has been done, I
> want to retrieve the value of the interpolated thickness at each new
> created nodes inside the surface in order to define variable thickness
> shell elements.
> Do you see any way to do so ?
> Thank you in advance !
> Best regards,
> Mathieu ARQUIER
> Structural Engineer
> mathieu.arquier at gmail.com

I checked the tutorial 7 he referred to. In my opionion this examples
controls the size of the elements by using a *.pos file and not controlling
the thickness. So my question is how I can assign a thickness for example
to a rectangle area as a linear function from 1 to 10 in x-direction and
constant in y-direction?

Best regards
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