Better Tetra4(C3D4) to Tetra10(C3D10) converter tool?

1

Hi, everyone! Does anybody have or know a tool that can convert C3D4 element to C3D10 in the format of calculix or abaqus inp file? I have wroten a fortran program that can work correctly, but the performance is worse, it’s too slow for me. Converting about 90000 C3D4 elements will cost about 5min on my laptop (ThinkPad P15 Gen2 with 32GB Memory) !

So, I am looking for a better tool that can convert elements to second order faster. Better can be call for use in other program like fortran etc.

Thanks for all your help!

2

Gmsh should be able to do it with the SetOrder 2 command.

1 Like
3

Can you explain it in more detail? I am not very familiar with gmsh. My mesh data is a “.vol” file generated by calling netgen in my fortran program then I read the node and element information from the vol file.

Can gmsh convert directly through the “vol” file, or do I need to convert it to “.msh” format first?

4

it can be opening in CGX and typing command mids to convert to/from any quadratic element

5

Thank you！ I’ll try that. Now I solved the problem using the method that @Calc_em mentioned above by calling gmsh. Because my inp file is writen in fix format, using cgx I need to change it to free format. I’ll try it later.

6

Netgen vol mesh format also can be read by CGX, then setting to quadratic as previously. described. However, calling to generate quadratic element seems to be possible directly in Netgen, but maybe another reason to not to use.