Importing a model from another software to rfem5 will the mesh element details be among the imported file too
Hi Chukwudalu, thank you for your suggestion.
To be honest, I don't think importing an FE mesh is a good idea. It completely contradicts the current concept of RFEM.
In RFEM, we try to automate the mesh generator as much as possible to create a good FE mesh. With the FE mesh refinements, we provide the user with a tool that allows the mesh to be adjusted. However, the specific coordinates of the FE nodes are always determined by the RFEM mesh generator. Importing a mesh would violate this principle.
The option to import a mesh would raise the question of what should happen if the user changes something in the model. Should the mesh be deleted or not? Both options would have very unpleasant consequences. If the mesh is deleted and regenerated during the next calculation, very large changes in the calculation results may occur under certain circumstances. If the mesh is not deleted, the calculation will not match the modeling, and design errors would be inevitable.
Frank
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Hi Chukwudalu,
in addition to Frank's answer:
You can significantly impact the generated mesh by inserting nodes, lines and surfaces into members, surfaces and solid elements, respectively, because they act as constraints for the meshing algorithm. Therefore, I recommend you to use this approach to influence the mesh generation the way you like it to be.
And of course, the geometry can be prepared in another software and imported into RFEM 6 using one of our numerous import options:
https://www.dlubal.com/en/downloads-and-information/documents/online-manuals/rfem-6/003855
I hope this helps you. Were happy to assist you, if you have any further questions.
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Wow you guys just blessed my day, I first use multiple lines to mesh my surface then I click on generate mesh, my mesh elements were generated as the way the line is meshed
Also I want to ask if there is a ratio that can guide me to mesh my surface from least mesh size to the highest mesh size to avoid distortion that normally occur when mesh size change
You are welcome 
You mean like an option in the settings? Or do you mean an approach/technique how to create the meshing layout?
Yes a mesh technique that will guide me to mesh my surface from least mesh size to highest mesh size to avoid mesh distortion for smooth transition
I understand. I am afraid that I cannot provide you with information about this. But maybe my colleague @marc.gebhardt can help you better as he as more to do with meshing and mesh optimization ...
Hi Chukwudalu,
It's great to see you diving deep into our 3D-solid mesh generation!
We are constantly optimizing our software to meet customer requirements and make their work even more pleasant. This also applies in particular to the 3D-Mesh. We have already many new features in the timeline in this regard.
If you have any models, where you have problems, I would be pleased if you share them to me. So we can see what can help you now and what will be prioritized for the development.
If you want to experiment yourself, you can try our import options (e.g. stl), if you have already generated a mesh that works for you. Also, you can take a look at our Dlubal API. Maybe you can combine it with an external package, p.e. gmsh.
Best regards,
Marc