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Beam to beam elements connectivity

Hello All,

 

Currently, I am trying to model a layered beam one on top of other. I started with 3 layers with leaving a small gap (0.01 mm) in between. I am interested in connecting the nodes of top layer (one line representing a beam) to the adjacent beam having same number of nodes through beam elements. To be more clear, merging nodes with same element type connectivity (beam to beam).

I actually tried connecting some of the nodes at equal distance with beam connector. But in the visualization and results those connector elements are invisible and did not contribute to capture localized buckling.

My goal is to get top layer buckled and the layer underneath should bend and follows with it. 

Does anyone suggest to do element connectivity through same nodes?

Regards,

Jay Patel 

Comments

Frank Richter's picture

 

Hello

nodes in beam elements are located on the symmetry line, not on the rim. The spatial resolution through the thickness is taken care of by section points. Study the chapter on beam elements in the manual.

I do not know if connector elements can do the job. Anyway, then you have a gap which is quite different from the structure you aim to construct.

My conjecture is that your task is not feasible.

If you use ABAQUS: I recommend you become a member of the ABAQUS mailing list
http://groups.yahoo.com/neo/groups/Abaqus/info
and post there.

Good luck

Frank

------------------------------------------
Ruhr-University
Bochum
Germany

Hello Frank,

Thanks for the clarification. Yes it is really depend on cross-section of the beam. I also tried defining feasible gap which do not overlaps the next layer. Still, I was unable to get localized buckling.

I think making contact with springs and dashpot might work. But it requires relevant calculation to estimate spring stiffness and dashpot co-efficient.

My ultimate goal is to make a structure with layers having different stiffnesses. Making alternate layers of weak and strong layers respectively, the mimic of laminated structure can be captured.

I know in principle it is easy to do with shell elements. But I don't know how we can make layered shell structure in ABAQUS? Because, the contact will be still an issue. 

Could you suggest anything how we can make layers of shells or beam to shell connection?

Thanks,

Jay Patel 

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