Tetra parabolic in Radioss

ivanIEV
ivanIEV Altair Community Member
edited November 2020 in Community Q&A

Hello everybody, 

 

I simulate quasi static tasks within Radioss. Models that I use cannot be meshed with hexa(design is too complex) but the quality of linear tetra isn't sufficient. Parabolic tetra seems reasonable solution, but I faced crashes with different control types, for CST, for example, it is spontaneous mass growth in contact area(always in the middle nodes). Does anybody have experience with such issue? Any tips regarding usage of parabolic elements?

 

Regards,

Ivan

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Answers

  • Yuhao He_20868
    Yuhao He_20868
    Altair Employee
    edited November 2020

    Instead of using second order tetra element, you could try using first order tetra, but with Itetra=1 in the /PROP/TYPE14 property card. It is a better tetra formulation that overcomes many common limitations of first order tetra elements.

    Here is the note from the user manual: Quadratic /TETRA4 formulation with six DOF per node and four integration points.

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