Mesh Number and Mesh size

[ulke simsek]

Hi every one,

i have generated my surface mesh by using quick surface pipe, but i want to decrease the mesh number of my model, how can i achive that can i arrange the mesh size in dream 3d,

Best regards,

[Sean Donegan]

DREAM.3D does not currently have the ability to decimate meshes.  You could try reading the mesh into ParaView (when writing your .dream3d, you'll also get a .xdmf file that can be opened by ParaView).  ParaView has a couple filters that can decimate meshes.

-Sean

ulke simsek

Sunday, May 13, 2018 3:15 PM

Hi every one,

i have generated my surface mesh by using quick surface pipe, but i want to decrease the mesh number of my model, how can i achive that can i arrange the mesh size in dream 3d,

Best regards,

--
You received this message because you are subscribed to the Google Groups "dream3d-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to dream3d-user...@googlegroups.com.
To post to this group, send email to dream3...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/dream3d-users/54eb55fc-30a9-4749-81bb-80a7c831d188%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[Farhan Rahman]

Sean, 

A similar question: does the number of element generated by the 'ABAQUS Hexahedron writer' filter depend on the density of the .stl input file (if used)? 

I'm using a .stl file as input, and someone suggested that, I may be able to reduce the element number generated by DREAM3D by reducing the number of triangles (faces) in the .stl input file. I've reduced the .stl input file resolution in Solidworks and also in Meshlab, but I don't see any change in element number of the .inp file generated by the 'ABAQUS Hexahedron writer' filter. 

Thanks, 

Farhan

[Sean Donegan]

You're using one of the sample triangle geometry filters to create a volumetric representation from your STL file, correct?  If so, then the number of elements in your ABAQUS files will end up depending on the (x,y,z) extents (i.e., number of sample points in each dimension) that you use in the sample triangle geometry filter.  You can reduce the total number of elements by reducing these extents numbers.

Note that if you want the grid you are sampling to cover the same spatial range, you would also have to change the resolution along with the extents.  For example, let's say you use a sampling grid that has extents 100x100x100 with a resolution of 2,2,2.  The total real-space dimensions is then 200x200x200, and the resulting geometry would have 1000000 elements.  If you reduce the extents to 50x50x50, you would then have a geometry with only 125000 elements, but you would need to change the resolution to 4x4x4 to ensure that the geometry covers the same spatial range.

hope that helps,

-Sean

Farhan Rahman

Monday, May 14, 2018 8:40 AM

To view this discussion on the web visit https://groups.google.com/d/msgid/dream3d-users/cfc30879-bca4-4d2d-a8d3-3bb5deba9c5f%40googlegroups.com.

For more options, visit https://groups.google.com/d/optout.

Sean Donegan

Monday, May 14, 2018 6:49 AM

[Farhan Rahman]

Sean, thanks. It was helpful. 

[Aniket Chakrabarty]

Dear Sir,

I have a similar query. I am trying to generate an artificial microstructure through DREAM 3D. The pole figure data is obtained from the CTF file of  2D EBSD data. This artificially generated microstructure is to be imported into ABAQUS so that it could be run with a crystal plasticity code.

But I am seeing that I am having no control over the mesh size for the ABAQUS input file created by DREAM 3D. A lot of elements are being generated even though the number of grains is 11. Element wise Euler angle data is required for the crystal plasticity material UMAT in ABAQUS. But the number of elements are so many that firstly I can hardly manage them and secondly there is no assurance that the code will run on a computer with some minimal or ordinary configuration.

Is there no way that i can really reduce the number of elements and hence increase the mesh size. In this way the entire problem will not only be manageable but also the code could be run on an ordinary computer.

Please help me out sir. Even if there is no Filter in DREAM 3D to control the mesh size please tell me if we can somehow export some IGES file from DREAM 3D so that it can be imported into ABAQUS. But in that case again we will not have the grains in form of element sets. Please suggest me sir how to get out of this problem

[Michael Jackson]

http://www.dream3d.io/Filters/SyntheticBuildingFilters/InitializeSyntheticVolume/index.html

The web page shows how to adjust what I believe you describe as the "mesh" size.

_________________________________________________________
Mike Jackson                  mike.j...@bluequartz.net
BlueQuartz Software                    www.bluequartz.net
Principal Software Engineer                  Dayton, Ohio

--

You received this message because you are subscribed to the Google Groups "dream3d-users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to dream3d-user...@googlegroups.com.
To post to this group, send email to dream3...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/dream3d-users/31ee99e1-7758-445d-ad13-ff42830985ae%40googlegroups.com.