01-25-2024, 03:12 AM
I'm trying to implement my own RBE3 according to the Mystran manual and I've noticed something that looks like a familiar type of wrong behavior. I'm not really sure if it is wrong or not or if Mystran also behaves this way. I haven't used Mystran before but I'd like see what other people think of it before setting up Mystran and learning how to define a model.
In my implementation, when I apply a moment load about the x axis, it causes the correct moment about x but also another moment about the y axis as shown in the attached picture. Note that the independent nodes are on an inclined face, not in a plane normal to the applied moment.
If you've used RBE3 before, would you expect this beam to bend as well as twist?
I'm suspicious of this because CalculiX has a similar issue with its moment loads on beams which are internally converted to MPCs similar to an RBE3.
In my implementation, when I apply a moment load about the x axis, it causes the correct moment about x but also another moment about the y axis as shown in the attached picture. Note that the independent nodes are on an inclined face, not in a plane normal to the applied moment.
If you've used RBE3 before, would you expect this beam to bend as well as twist?
I'm suspicious of this because CalculiX has a similar issue with its moment loads on beams which are internally converted to MPCs similar to an RBE3.