modeling of a Euler Bernoulli beam with solid elements

[chulminy]

Hi Experts

I'm modeling a simply-supported beam structure and computing natural frequency. I got natural frequencies of the beam similar to analytic solutions using wire-beam element. However, I don't know how I can model it with solid elements. The assumption for Euler-Bernoulli beam is the section should remain plane after deformation and normal to the deformed axis of a beam. In the wire-beam case, I don't the beam section is always located at the normal to the

http://www.eng-tips.com/threadminder.cfm?pid=799#

"wire" but, I don't know how to set it up with the solid element.

If you know answer, please give me comments.

Thanks

 

[burningDiesel]

Using solid elements you will always take into account transverse shear stiffness. If your beam is thin enough, this is not an issue. If it is too thick, you shouldn't be using Euler-Bernoulli beams!
So actually I don't understand your problem.

 

[chulminy]

Thanks for, sdebock. Your answer is really helpful for me. I just want to make a Euler beam model with solid elements, no more or no less. Is there way that I can put constraints or boundary conditions so that my "solid" beam model behave like Euler beam?

 

[dimvoly]

What would be the purpose, can you let us know?

I'd imagine it would be a nightmare to specify plane sections remain throughout the beam and whatever other assumptions there are.

 

[chulminy]

Thank you for comments. This is for a research purpose. I'm modeling moving force, mass and oscillator on a beam to simulate moving cars on the bridge.

I know several people already have worked on this topic but, I want to compare FEM results with theoretical equations (closed form solutions)

However, the existing theoretical solutions are based on the assumption of Euler-Bernoulli.

Unfortunately, I don't know how to model moving mass and oscillator on the wire beam in ABAQUS, but I can do this on the solid beam.

That's why I am trying to find a way to make them the Euler-Bernoulii condition.

Does anyone help?

 

[burningDiesel]

I'm guessing modeling the mass and ocillator on the wire beam is easier
Is there a reason you can't just put these on the beam central nodes?

 

[chulminy]

To be honest, I don't know how can I model moving mass and oscillator on a wire beam. There is no specific reason.

If you know how to model it, could you give me some ideas? I think moving load is not difficult but, how can I move mass on a wire beam?

Please help...

 

[burningDiesel]

use node to surface contact, define a mass element and link it to a node, move the node.