Calculix: beam element actually a 3D solid?
Calculix: beam element actually a 3D solid?
(OP)
Hello,
as far as I know, (and the CalculiX manual seems to support it) the B32 element in CalculiX FE library actually is a 20-node 3D solid.
To my understanding (and as have been in FE software I've used before), a 'true' 1D beam element in FEA has a precise analytic solution, while solids haven't.
To those of you that have got any experience with CalculiX, did this feature ever lead to any real problems with results precision?
Thanks and regards,
Alex.
as far as I know, (and the CalculiX manual seems to support it) the B32 element in CalculiX FE library actually is a 20-node 3D solid.
To my understanding (and as have been in FE software I've used before), a 'true' 1D beam element in FEA has a precise analytic solution, while solids haven't.
To those of you that have got any experience with CalculiX, did this feature ever lead to any real problems with results precision?
Thanks and regards,
Alex.
Alex Bausk
Structural engineer
http://bausk.wordpress.com





RE: Calculix: beam element actually a 3D solid?
If you look back on their yahoo group you'll see some test cases I ran demonstrating why a beam element could not be approximated at the time by the existing elements in their library.
Cheers
Greg Locock
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RE: Calculix: beam element actually a 3D solid?
thanks for your input.
I found the discussion you've mentioned on Yahoo groups, as well as some pdfs. One of my first thoughts was, too, possible problems with the torsional behavior of a beam.
I wonder if anyone has actually made any further study or developed any workarounds for this problem since that thread, which is 3 years old by now.
Maybe I'll come up with some ideas when I'm done studying the subject. CalculiX is too much fun to let it be spoiled that easily.
Regards
Alex Bausk
Structural engineer
http://bausk.wordpress.com
RE: Calculix: beam element actually a 3D solid?
There is nothing to stop you from writing your own beam element.
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