[GiDlist] Surface mesh from solid mesh

windowsXP GiD9.0.4
Hi GiD team
I have results of a 3D stress analysis (quadratic tets) and want to be
able to compare the deformed meshes from 2 analysis to visualise how
much the surface moves between the 2 results, the original mesh for the
2 analysis are identical.

I have tried exporting the deformed mesh as a gid ascii mesh from the
postprocessor then importing it into the preprocessor but can find no
way of turning this into a surface only mesh i.e. throwing away all the
internal elements. I have done something similar in the past but with
surface meshes from a shell element analysis where I have been able to
export the surface mesh & re-import this as triangle element geometry.
So if I can find a way to convert this solid mesh into surface only mesh
I should be able to do what I want.

I have also tried importing both deformed meshes (add no share) into the
preprocessor but seem to be unable to import each to a different layer
to make visualisation easier?
Open multiple in the postprocessor doesn’t help either.
I have also tried using utilities list nodes to export the coordinates
of the nodes of interest but it will only list the first 100 entries?

Any suggestions most welcome.
Regards
mark

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Hello,
You can use the option Files–Export–Post information–ASCII
boundaries…
which writes the boundaries of your volumes, and its results, in ASCII
files: name.msh and mane.res.
If your mesh is deformed when you select this option, then the saved
boundary is also deformed.
Is that what you want?

best regards,

Miguel Pasenau

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-----Mensaje original-----
De: gidlist-admin at gatxan.cimne.upc.edu
[mailto:gidlist-admin at gatxan.cimne.upc.edu] En nombre de Smith, Mark
Enviado el: lunes, 30 de noviembre de 2009 14:25
Para: GiD_list
Asunto: [GiDlist] Surface mesh from solid mesh

windowsXP GiD9.0.4
Hi GiD team
I have results of a 3D stress analysis (quadratic tets) and want to be
able to compare the deformed meshes from 2 analysis to visualise how
much the surface moves between the 2 results, the original mesh for the
2 analysis are identical.

I have tried exporting the deformed mesh as a gid ascii mesh from the
postprocessor then importing it into the preprocessor but can find no
way of turning this into a surface only mesh i.e. throwing away all the
internal elements. I have done something similar in the past but with
surface meshes from a shell element analysis where I have been able to
export the surface mesh & re-import this as triangle element geometry.
So if I can find a way to convert this solid mesh into surface only mesh
I should be able to do what I want.

I have also tried importing both deformed meshes (add no share) into the
preprocessor but seem to be unable to import each to a different layer
to make visualisation easier?
Open multiple in the postprocessor doesn’t help either.
I have also tried using utilities list nodes to export the coordinates
of the nodes of interest but it will only list the first 100 entries?

Any suggestions most welcome.
Regards
mark

Please be advised that this email may contain confidential information.
If you are not the intended recipient, please do not read, copy or
re-transmit this email. If you have received this email in error,
please notify us by email by replying to the sender and by telephone
(call us collect at +1 202-828-0850) and delete this message and any
attachments. Thank you in advance for your cooperation and assistance.

In addition, Danaher and its subsidiaries disclaim that the content of
this email constitutes an offer to enter into, or the acceptance of,
any
contract or agreement or any amendment thereto; provided that the
foregoing disclaimer does not invalidate the binding effect of any
digital or other electronic reproduction of a manual signature that is
included in any attachment to this email.


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