Connect Beam Elements

[Mohse Elbaz]

Hello everyone,

I am trying to create a simple model with beam elements, but it’s turning out not to be so simple.

The problem is that when I apply a load on the beam elements, the beam "flies away" or detaches. I have tried several approaches to fix it, but I haven’t succeeded.

Here are the relevant input cards I’m using:

• *CONTACT_AUTOMATIC_GENERAL

• *LOAD_BEAM_SET

• *MAT_PLASTIC_KINEMATIC

About the beam elements:

• Each beam element is 35 mm long

• Each beam has 3 nodes

Also, the bottom part of the model is fully welded (fixed support).

I suspect the problem is related to the connection between the beam elements, because when I tried a single cantilever beam, the model worked perfectly.

Can anyone help me understand what might be wrong and how to fix this?

Thanks in advance!

[Mohse Elbaz]