Talk:Contrib:Claws/Code Aster/10 x cases/liaison mail
Hoi Claus
Very nice! This coupling with liaison_mail is a item that has been interested me for long but never had time to study it. This makes it all much easier.
One question about your calculation: how do you prevent the rotation of the component with the pressure applied to it? Maybe I just didnot read carefully enough and I overlooked the obvious.
Thank you once again.
kind regards - kees
Thanks for the input.
Bear in mind that the page is not done yet (feb 10) so it will change a bit when I pull myself together and get it done.
About your question: Damn good question! At first I thought it was because I used LIAISON_UNIF; this makes the 'press' face not rotate and deform, like it was welded to the source of the pressure. But! and this is a big but, if I remove LIAISON_UNIF and and apply e.g. PRESS_REP instead of FORCE_FACE (-Fz), the pressure face starts to bend - and that just doesn't make sense. I get some errors on the calculation that might be related. As far as I can tell the two meshes are too different and the 'calculation might produce incorrect results' - I however, haven't had time to refine mesh and play around with it recently. Do you have a suggestion?
I will investigate more when I get the time - right now Im playing with beams and shells for some semi-actual work :)
! l'angle forme par le vecteur normal courant a 1 face et le vecteur normal moyenne, au noeud N6559 , est superieur a 10 degres et ! ! vaut 16. degres.
! PROJ_CHAMP (ou LIAISON_MAIL) : ! ! Nombre de noeuds projet�s sur des mailles un peu distantes : 22. ! ! (la distance � la maille est sup�rieure � 1/10i�me du diam�tre de la maille) ! ! ! ! Le noeud NS22841 est projet� le plus loin � la distance 0.154085 !
Two images: with and without LIAISON_UNIF - as you can see, without unif the hinge applies torsion to the pin that it sits on, and it shouldn't do that. Something is amiss.
without_UNIF.png
with_UNIF.png
