Simplified bolt connection with beam element and rigid constraints

Bolts are the most common topic here, so you can find many threads and examples about them. However, in PrePoMax/CalculiX, they are usually modeled using solid elements, sometimes springs or rigid links (couplings/rigid body constraints). The approach with beams is more tricky. Here are some examples:

For the other 1D element approaches see those threads:

And a video example here: https://www.youtube.com/watch?v=AiLCzKAOdx0

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