RBE2 versus RBE3
RBE2 versus RBE3
(OP)
Can anyone explain the difference between an RBE2 and RBE3?
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RE: RBE2 versus RBE3
RE: RBE2 versus RBE3
RE: RBE2 versus RBE3
Assume you have a plate with a rigid box attached to it by 4 screws. Using the location of center of mas of the box you place a node there, apply downward force (weight), other applied forces, and run it.
You use RBE2 in this case because the box adds stiffness to the body, but you do not want/need to model the box.
RE: RBE2 versus RBE3
I have a clarification regarding your discussion..
Actually RBE2 elements does not add stiffness to the model..
But it is a constraint element that prescribes the displacement relationship between two or more
grid points.
You can find in the formulation of RBE2 element, it does not have stiffness factor and it will not mathematically affect the changes in results..
It will only transfer load with out any loss..
Karthik
RE: RBE2 versus RBE3
RE: RBE2 versus RBE3
The RBE2 is a rigid connection typically attaching a single node to other multiple nodes. Depending on what DOFs you are transmitting (translations and/or rotations) you are slaving those nodes to the single master. If you consider just translations (to be simple) then the slave nodes will have the same displacements as the master. There will be no relative displacement between the slaves. Does this change the stiffness ? Well it sure does if you look at the nodes that have no relative displacement (slaves and master alike).
But it does change the stiffness matrix.
So go figure.....
RE: RBE2 versus RBE3