Please read the paper <a href="http://www.vtk.org/pdf/AdaptorFramework.pdf">http://www.vtk.org/pdf/AdaptorFramework.pdf</a>. This may help shed light on the topic. The point is, rather than trying to shoehorn FEM data structures into VTK (which is not pretty), you can build adaptors from VTK to native FEM codes and data structures.<br>
W<br><br><div class="gmail_quote">2008/7/3 Pierre JUILLARD <<a href="mailto:pierre.juillard@gmail.com">pierre.juillard@gmail.com</a>>:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div>Hi all,</div>
<div> </div>
<div>I would like to have information about the best way to handle FEM data in VTK file.</div>
<div> </div>
<div>Mainly, we use shell meshes (triangles or quadrangles) and the following data would be manipulated in VTK:</div>
<div>- reduced element or fully integrated (1 or 4 integration point in the neutral fibre)</div>
<div>- different integration point over thickness per element (1, 3, 5, 7, 9, 11, ...)</div>
<div>- different integration algorithms over thickness (GAUSS, SIMPSON,
....) defining different weight and locations of these integration
points over thickness</div>
<div>- stress tensor at each integration point over thickness</div>
<div>- strain tensor at each integration point over thickness</div>
<div>- effective plastic strain at each integration point over thickness</div>
<div>- thickness at each integration point in the neutral fibre</div>
<div>and possibly additional results per integration points...</div>
<div> </div>
<div>This topic seems to have already been tackled.</div>
<div>Indeed, I have read several posts about the vtkLSDynaReader class, as well as its documentation on </div>
<div><a href="http://public.kitware.com/VTK/doc/nightly/html/classvtkLSDynaReader.html" target="_blank">http://public.kitware.com/VTK/doc/nightly/html/classvtkLSDynaReader.html</a></div>
<div> </div>
<div>As it is indicated in one of the post, the ultimate goal would be
to benefit from vtk format/library to manipulate FEM data, and from
ParaView as PostProcessor</div>
<div> </div>
<div>However, from these posts, it seems that VTK is not really fitted
to store FEM data, and for such a purpose, a good knowledge in VTK is
necessary. It may also be necessary to extend it.</div>
<div> </div>
<div>Most notably, it seems currently possible to have only one scalar
field, vector field, and tensor field per element. In the last VTK
versions, has this "limitation" been overriden?</div>
<div>Is it possible to store several fields of different types per element?</div>
<div> </div>
<div>Would you have some advices about the best way to proceed?</div>
<div>Is there somewhere some guidelines/tutorials?</div>
<div> </div>
<div>It the VTK format has still some limitations, is it foreseen to override them in the next release?</div>
<div> </div>
<div>I thank you for your help.</div>
<div> </div>
<div>Cheers,</div>
</div>
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<br></blockquote></div><br><br clear="all"><br>-- <br>William J. Schroeder, PhD<br>Kitware, Inc.<br>28 Corporate Drive<br>Clifton Park, NY 12065<br><a href="mailto:will.schroeder@kitware.com">will.schroeder@kitware.com</a><br>
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