I'm modeling a pipe in Patran, and I'd like to try bar3 and bar4 elements. I assing the properties CBEAM to my geometry, but when I create the mesh, Patran tell me bar3 and bar4 don't support that property, and I need to use bar2. Doesn't work even with CBAR, CROD or CPIPE. How can I use bar3 then? Seems like no properties work.

Thank you for helping me out.

  • $\begingroup$ AFAIK Nastran doesn't have any curved beam elements with 3 or 4 nodes. Patran can generate input for other FE programs that do have such elements. $\endgroup$
    – alephzero
    May 20, 2019 at 20:25
  • $\begingroup$ It’s just a straight beam with a circle section $\endgroup$
    – gbos
    May 20, 2019 at 20:36

1 Answer 1


It's been forever since I've used patran, but in Nastran what you are looking for is CBEAM3. that's a 3 noded beam. CBEAM is strictly 2 nodes.


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