[Gmsh] Composite RVE

[Hossam Ragheb]

Apologies for the late reply. Thanks Christophe, It works fine now.

Regards, Hossam

On 14/12/2020 20:50, Christophe Geuzaine wrote:
> CAUTION: This e-mail originated outside the University of Southampton.
>
>> On 10 Dec 2020, at 14:34, Hossam Ragheb <har1g15 at soton.ac.uk> wrote:
>>
>> Hi,
>>
>> I am new to gmsh, so apologies if the answer to my question is obvious.
>>
>> I coded a .geo file (Attached) to create 3D RVE with fibers in a matrix that includes voids.
>>
>> The process simply is :
>>
>>      1- Create box of the matrix material.
>>
>>      2- Create voids using Sphere command and BooleanDifference to remove these from the matrix material.
>>
>>      3- Create fibers as Cylinders and and utilise BooleanFragments to include the cylinders in the matrix.
>>
>> I have one persistent problem, once the mesh is created the fibers are meshed as hollow cylinders, however i need them to be solid.
>>
>> Its interesting behavior. Last thing to note that mesh size affects the outcome, for example when the min/max mesh size is 2, the result is solid cylinders, but with mesh size of 1, it becomes hollow.
>>
>> It there a way to force the meshing algorithm to mesh the cylinder as solid object?
>>
>> I have attached the .geo file, please let me know if you can help.
>>
>> Any suggestions?
>
> The geometry is a bit tricky: it's almost degenerate (with some cylinders very close to the boundary), and the parametrization of some curves does not seem monotonic. I've successfully meshed with the following parameters:
>
> MeshSize{305, 310} = 0.5;
> Mesh.MeshSizeMax = 2; // successfully tested with 1 and 2
> Mesh.AngleToleranceFacetOverlap = 1e-6;
> Mesh.Algorithm3D = 10;
>
> Christophe
>
>
>> Thanks,
>>
>> Hossam Ragheb
>>
>> <RVE_rev1.geo>_______________________________________________
>> gmsh mailing list
>> gmsh at onelab.info
>> https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fonelab.info%2Fmailman%2Flistinfo%2Fgmsh&data=04%7C01%7Char1g15%40soton.ac.uk%7C2d883704735a4170b10908d8a071e9a6%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C637435758392711911%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=gfbYdVnFYMsVlAZMfoBKb%2Fe3EAGSk3YJb5QoADlJ7Zk%3D&reserved=0
> —
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science
> https://eur03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fpeople.montefiore.ulg.ac.be%2Fgeuzaine&data=04%7C01%7Char1g15%40soton.ac.uk%7C2d883704735a4170b10908d8a071e9a6%7C4a5378f929f44d3ebe89669d03ada9d8%7C0%7C0%7C637435758392711911%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=AledTjJM7AOu1pI11gBrPWraciR%2F8Yumu4JvCzoYBnQ%3D&reserved=0
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://onelab.info/pipermail/gmsh/attachments/20201218/536183e0/attachment.html>