I know the examples. They are really cool and show the strength of Calculix.
Well, I tried and it's not shear locking. The results for the B32R element are exactly the same - 20% in error. I read CCX 2.13 manual and see that similar examples/issues are discussed there. The manual says displacements are quadratic (2nd order polynomial), which implies that displacement and rotations are both interpolated independently to 2nd order, unlike in the classical beam element.HarryvL wrote: ↑Sat Apr 07, 2018 7:59 am... Also, I now think I know why the CCX 3-Node element behaves so poorly. It's probably shear locking. That's what you can get when you use volume elements for beams, plates and shells. The same element with reduced integration (B32R) should perform much better for this example.