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For advice on mechanics in general, including modeling,

you can consult

http://imechanica.org/

Good luck

Frank

You can check if GID is useful for you. Another way is to project NURBS elements into linear finite elements (you can refine the linear elements for better visualization) and use common post-processing tools (such as paraview, tecplot, gid, etc.)

For preprocesser, you can use rhino software for 2D geometries. For 3D solids elements, I don't think you can find a preprocessor.

Hello,

If you have Matlab or Octave, you could try GeoPDEs library, which is available at http://rafavzqz.github.io/geopdes/.

It provides toolboxes and examples for creating NURBS geometries. Moreover, the hierarchical package allows you to produce refinements for the space and mesh easily based on your problem. Finally, there is a dedicated help/mailing list you can look at, and ask some questions if the answer is not already there.

Best regards

Maybe, the paper ( Tools and techniques for building models for isogeometric analysis ) can give you some advice.

Check out www.nutils.org Nutils is an open source numerical utilities software that includes IGA,FEM, DG, etc. The examples file includes an IGA sample code that uses NURBS for the infinite plane strain problem with a hole that you can check out on http://www.nutils.org/en/latest/examples/platewithhole-nurbs/

Enjoy and feel free to reach out if you have any questions.

This chapter, Data Extended Isogeometric Analysis for Strong and Weak Discontinuities

Check out this one https://www.geomiso.com/

Hello,

There is also a good package that can be used under MathLab and Octave. This package is called GeoPDEs and can be reached using the following link:

http://rafavzqz.github.io/geopdes/

Bests,

Mohsen

Dear Thein Lin Aung ,

You can have a look at the Geometry + Simulation Modules (pronounced gismo): https://github.com/gismo/. It is a C++ code that offers (NUR)BS creators and plotting in Paraview.

Best,

Hugo

the geoPDE Toolbox is ok...

http://rafavzqz.github.io/geopdes/

Hi, see

http://nvinhphu.wixsite.com/mysite/resources

For post-processing I encourage you to investigate the Bezier cells data-type that we (Coreform) added to VTK -- making them available in ParaView. Here's the KitWare blogpost on our work, where there's also a link to our full report.

https://blog.kitware.com/implementation-of-rational-bezier-cells-into-vtk/

Regarding pre-processing, we are developing an IGA pre-processor based on the Cubit meshing software from Sandia -- our software is called Coreform Cubit. While Coreform Cubit is a mature traditional meshing software, we're still developing many of the CAE pre-processing capabilities. While Coreform Cubit will eventually be primarily developed to support our Coreform IGA solver, we also intend to support other solvers that have IGA capabilities. For instance, we've been working closely with Idaho National Labs to add Bezier extraction support into their open-source MOOSE FEM code.

When this is complete, users will be able to create IGA models in Coreform Cubit and run simulations in MOOSE! As it is today, you can already pre-process non-IGA MOOSE simulations in Coreform Cubit, as both MOOSE and Coreform Cubit natively digest the Exodus mesh format.

If you're interested in providing feedback or testing Coreform Cubit we provide a free non-commercial "Learning" edition called Coreform Cubit Learn, which is limited to exporting 50k elements. Find more information here: https://coreform.com/products/coreform-cubit/free-meshing-software/

Hi, see

https://sourceforge.net/projects/cmcodes

Thanks