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Subject: Re: How to mesh --- Please help!
Author: David Gross
Date: 1998-12-17 08:10:00

In case you didn't notice, you're trying to model a very thin-walled
cylinder --
r/t ratio approaching 30. It is understandable why the solid92 (tet)
elements would require a very large number...

You can improve things significantly by going to a brick element (e.g., 45
or 95) and taking whatever measures are required to accomplish a mapped
mesh. Even in this case, however, you will need a fairly fine mesh to keep
the element aspect ratios down below 20, above which they begin to complain.

The best solution is to make use of shell elements (e.g., 63). These
elements were made for thin-walled applications like yours. Most likely,
these elements will have the capabilities you need.

Best Regards,

David Gross

>From: Tham

>Hi,

>Im trying to mesh a hollow cylinder , with the outer radius is 203 mm and
>thickness 7.1 mm, the length of the column is 4010 mm. I managed to model
>the column using Ansys build-in modelling tools (hollow cylinder), but when
>I tried to mesh it (after selecting the solid92 element and entering the
>material properties), it hangs most of the time. Then, I try to set the
>mesh to coarser (Im using smart meshing tool), and finally Ansys managed to
>mesh the cylinder but with huge number of elements and nodes! (more than
>100,000).

>So, the question is what should i do to reduce the elemnet size? I tried to
>set the element size coarser by using the global size but still can't mesh
>it properly.

>Thanks in advance.

>Rgds,
>Clement Tham

Posts possibly associated with message #66AuthorDateScore
63How to mesh --- Please help!Clement Tham1998/12/17 
64Re: How to mesh --- Please help!Marc Seidel1998/12/17 
66Re: How to mesh --- Please help!David Gross1998/12/17 
67Re: How to mesh --- Please help!Xiao Gong1998/12/17 
68Re: How to mesh --- Please help!Tom Davis1998/12/17 
69Re: How to mesh --- Please help!Steve Owen1998/12/17 
70Re: How to mesh --- Please help!Paris Altidis1998/12/17 
74Re: How to mesh --- Please help!Peter Budgell1998/12/17 
77Re: How to mesh --- Please help!Viktor Doundakov1998/12/17 
78Re: How to mesh --- Please help!Jan Christian Anker1998/12/17 
89Re: How to mesh --- Please help!Dan Bohlen1998/12/18 
93Re: How to mesh --- Please help!Clement Tham1998/12/21