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How do loads applied to RBEs translate to models?

Hi,

Say I have a rigid body element in a hole, with one independent node in the middle and the dependent nodes being the inside surface of the hole. Now if I apply a force to the independent node and it is pointing towards one side of the hole, how does the force translate to the hole? Will it apply compression on one side of the hole and tension on the other? Or will it just apply a compression on one side?

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Cheers,

Josh

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Rahul Rajan_21763

While post processing you can visualize behaviour. It should apply compression on one side of the hole and tension on the other.

Altair Forum User

Thanks for that, Rahul! In that case, do you have any suggestions on how to simulate bolted joints and radial loads into a bearing housing?

QuyNguyenDai

For loading, don't use RBE2 but use RBE3 (interpolation element).

Altair Forum User

Hi Nguyen,

I've done a bit of research into RBE3s because I haven't used them before, but still don't quite understand them.

Is there a way I can set up my RBE to transfer ONLY compression loads, NOT tension loads?

This is how I'd go about simulating a bolt in shear loading.

Cheers!

Josh

Altair Forum User

Hi,

Im looking at the same thing as you Josh! Still trying to find the way to do it

Thanks

Cara

Altair Forum User

Is there a way I can set up my RBE to transfer ONLY compression loads, NOT tension loads?

I dont think it is possible with RBEs, as the RBE2s are stiffer and pushes/pulls the nodes equally.

In order to have only compression load to transfer and no tensions, the nodes which you think will under go should be connected to elements which has almost no stiffness.

Altair Forum User

Hi Prakash,

thanks for that! Is there some other specific way you'd recommend modelling bolts in shear loading?

Maybe a solid model with high stiffness?

I am specifically looking to model how an aluminium part will distort around steel bolt. The bolt is going to be the constraint and the load will be applied elsewhere on the part.

Thanks!

Josh

Altair Forum User

As @Q.Nguyen-Dai suggested try with RBE3 with different weight factors

Altair Forum User

Thanks Prakash,

I'll have a deeper look into RBE3s then.