Risa 3d orthogonal plates
Risa 3d orthogonal plates
(OP)
If I model an inverted L (end of small leg fully supported, end of longer leg laterally supported - loads down long leg) using plates I get very large deflections. The results point to rigid body movement or the plate formulation cannot handle this situation. Has anyone else had a similar experience with plates.





RE: Risa 3d orthogonal plates
What sort of Mesh are you using? Whether or not the structure is properly meshed will largely determine the accuracy of the results. A poorly meshed model can greatly exaggerate the drilling boundary condition issue I mentioned above.
RE: Risa 3d orthogonal plates
Thanks for your reply. I have square 20 mm x 20 mm x 3 mm thick elements with full translational fixity some distance removed from the orthogonal intersection so drilling will not be a problem. I found that if I make the elements larger 100 mm x 100 mm the problem of large deflections evaporates. Now I am curious if the formulation of the element has limitations on the size/thickness ration. The formulation is in Bathes book, which I own, so I may have to plow through the maths. Thanks again for your interexst.
RE: Risa 3d orthogonal plates
This is supposed to be the RISA Floor forum.
forum1419: RISA Technologies: RISA-3D