It was informative to see the effect of the shell DOF effect when connecting via a cylindrical surface vs a straight edge. Especially understanding the little nuances when considering the not so obvious like the effect of buckling on the cylinder shell to solid interface. Thank you.
Hello and thank you for the video. I have two questions. In 1st presented case - share topology case - do you perhaps hnow which contact formulation is used by Workbench? I cannot find any info on that, I allready checked the ds.dat file. In 2nd presented case - contact case - I would like to know which contact formulation are you using here? Under Details of "Contact region" you have "Advanced" options. Could you tell us which "Formulation" did you select? Thank you and best regards
Hi thanks for questions. 1 when you do shared topology - you don't have a contact, for bodies that share topology by default. Because you will have same nodes on both bodies 2 When you create an any contact (no mater edge to face, face to face) you can choose aby formulation you need - bonded (MPC), no separation (can be MPC, can be contact), frictional, frictionless, rough - it's classical contact with several types of formulation - pure penalty (the oldest, simplest , but not the best in most cases), lagrangian (best quality, but very complex in most cases), augmented lagrange (used by default in most cases because give better accuracy than pure penalty, and no so complex as lagrangian). when you need to connect shell to solid and make it work as one object - it's bonded (MPC) in most cases. If you don't control it with preferences, you can always check ansys input file (*.dat) and options for contatc pairs. they have good descriptions in help
What will happen if a shell element with a large thickness, like the cube example you showed, is pressed towards the solid body. Will the force only be applied to the nodes where the shell element is defined or over the whole thickness of the element. I hope you understand this question. I have run into some problems trying to model a brake rotor as a shell, but it seems to be causing major inaccuracies at the contact with the retainer because the force is applied at a smaller area then in reality.
Even bonding between shell edge and solid give some unphysical behaviour, especialy in area close to contact. If you need an adequat "no penetration" contact between thick shell side (which represented by edge) and face (from solid or other shell object), unfortunatelly, you need to use solid formulation. Shell edge will not give possibillity to do that in correct way.
Thank you so much for the informative video. Can you explain how to solve the rotation problem in the straight edge model? I am having a problem because I have mede a model where I have a shell connected to the beam and the beam rotates with the shell, and I have made another model where I connect shell to 3D beam and I cannot mimic that effect.
@@nuno_costa_2700 2 way - 1. merge nodes (if its possible 2. Manually create contact between end of beam and edge of shell. It can be done in fully manual way, or in semiautomatic (you need to change preferences for Contact "folder"
