Beam formulation Plaxis and Geostudio
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Author: southsoniks
Last Post: southsoniks
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Beam formulation Plaxis and Geostudio
#1
[/i]Hello!
I was wondering does anyone knows which type of beam formulation (Euler - Bernoulli or Timoshenko) does Plaxis and Geostudio uses. I tried to find out throughout manuals but there isn't any clue.
Thanks
Best regards
#2
I find out that Geostudio uses Euler-Bernoulli beam formulation, while Plaxis uses Timoshenko beam formulation.
Hope someone else than me finds this useful.
s
#3
Southosniks, I'm not so sure that Plaxis uses Timoshenko beam formulation. From where did you obtain that information.
#4
Mindlin's beam theory, actually!
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#5
(10-03-2010, 08:34 PM)ynopum Wrote: Mindlin's beam theory, actually!

i think that Mindilin's is for plate (thick plate), just like Kirchove Love for thin plate..
#6
Yes. The program is plane strain, and what we say that is beam represents a plate (1 m strip of it). It is written in the manual.

It is always a good idea before asking something for any program to check its documentation.

But it seems that the starter of this thread is banned for some reason, so answering was useless.
#7
I wouldn't say that is useless. I'm also researching beam formulation for FE analysis.
Unlike southsoniks,maybe, I did take a look in Plaxis manual, but there is no word about formulation, only test functions.
#8
Take another look in the manual :dash2: :
[Image: 38238113446960095678.png]
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#9
Ok. I see that I missread something. Btw, If you use Mindlin theory with width of beam 1m, it transforms to Timoshenko theory.
#10
I am curious why think that the beam formulation is important, especially in ground-engineering. Usually in this field have huge error in the input data; then the geometry is not precise; then the material behavior laws are far from the reality (elasticity theory, small displacements !!), and finally the FEM errors itself. Maybe your interest is just for some theoretical comparison.
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