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Civil Engineering Association Software Software Installation Problems & Bugs Archive Problem Beam formulation Plaxis and Geostudio

Beam formulation Plaxis and Geostudio
 southsoniks

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#1
07-31-2010, 04:06 PM
[/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




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 southsoniks

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#2
09-03-2010, 07:49 PM
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




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 freequo

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#3
10-03-2010, 06:33 PM
Southosniks, I'm not so sure that Plaxis uses Timoshenko beam formulation. From where did you obtain that information.




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 ynopum

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#4
10-03-2010, 07:34 PM
Mindlin's beam theory, actually!



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#5
10-03-2010, 08:04 PM
(10-03-2010, 07:34 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..




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 ynopum

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#6
10-03-2010, 08:27 PM
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.




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 freequo

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#7
10-04-2010, 05:34 AM
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.




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 ynopum

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#8
10-04-2010, 06:23 AM
Take another look in the manual :dash2: :
[Image: 38238113446960095678.png]



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 southsoniks

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#9
10-12-2010, 08:55 AM
Ok. I see that I missread something. Btw, If you use Mindlin theory with width of beam 1m, it transforms to Timoshenko theory.




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 ynopum

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#10
10-12-2010, 06:06 PM
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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