Timoshenko beams issue

[Roger Bergua]

Hi all,

I have been trying to model a cantilever beam in pyChrono.

When using Euler-Bernoulli beams, everything seems to work as expected. However, I get large displacements (~1.83 m instead of ~0.89 m) when using the Timoshenko beams. For reference, I have added the response from a third code (SubDyn). See the attached image: Wrong_Timoshenko_beams_behavior.jpg

Interestingly, if the discreization is increased very significaly, the expected results are obtained. See the attached image: Fine_discretization_Timoshenko.jpg

I'm not sure what is the issue. But it does not look consistent.

Attached you can also find the pyChrono input file used in *.txt format.

Thanks in advance for the support!

Roger