Learning Forum

[Rameez_ul_Haq]

Please observe the warnings below.

[Rahul Kumbhar]

These are caution warning. You may not have to worry about them if your results are okay. nThe first warning is about remeshing of contact surfaces on rigid bodies if there is any change. It is okaynThe second is always shown when there is change in contact status like no contacts to contact or vice-versa. These are pointers for user to understand what is ahppening with contacts. If it is not supposed to change status then you have to take correct action.nThird warning suggest remote point /mass/ joints attached to large surface. Nothing to worry about accuracy. This generally slows down the solution time a lot but if you are okay with that you can ignore it.nThe fourth warning suggest large slip in contact. Again it is caution to see if it is desirable. In summary warnings are not about solution accuracy but helping hands to understand what is happening in solution.n

[Rameez_ul_Haq]

,(1st warning) I mesh a rigid body in a mechanical model but the mesh is not apparent. I then tried to import that rigid body to a static structural module and create a contact between this rigid body and another body already present in the static structural, but ANSYS showed me this warning. I mean what am I supposed to do? Are the contacts formed or not?n(4th warning) In which cases should I prefer small sliding and in which cases should I go for large sliding? If the deflections or rotations are expected to be small, then should I turn on the small sliding assumption? If I have large deflections and rotations within my analysis, and I am putting the LARGE DEFLECTION OFF, then how would that create any kind of problem within my analysis?n

[Rameez_ul_Haq]

I was reading a document, published by ANSYS, regarding small sliding option and here is a small portion of that document:n,so according to this document, if you have large sliding within the model and you are still turning small sliding on, then it is going to affect the solution accuracy and might even cause convergence problems. So does large sliding mean Large rotation and deflection? If it does, then turning ON the Large Deflection option automatically turns off the small sliding option, or we have to do it manually? nHow can I turn finite-sliding option ON? I mean turning ON the Large Deflection option automatically turns on the finite-sliding option, or we have to do it manually somewhere?n

[Rahul Kumbhar]

For first warning you dont need to do anything. For fourth warning, you should turn ON large deflection. That is nonlinear option. If the solver is giving you this warning then there is no harm in turning ON large deflection. But if you are ok with large sliding with linear solution then it is okay. You should get the finite sliding with nonlinear option.n

[Rameez_ul_Haq]

Array, where can I find Number with too much sliding Contact Results Tracker?n