[Gmsh] Variable thickness surface

[Christophe Geuzaine]

> On 30 Mar 2020, at 12:57, Julian <julian.henneberg at googlemail.com> wrote:
> 
> Hello,
> 
> 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. 
> 

You can indeed interpolate a function on the 2D mesh; the API allows you to create a "post-processing view" for this quite easily (see e.g. demos/api/view.py).

Christophe


> Hi Mathieu,
> Have a look at the Gmsh Tutorial 7:
> http://geuz.org/gmsh/doc/texinfo/gmsh.html#t7_002egeo
> HTH
> 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
> Julian
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine