Bolt modeling in Workbench
Bolt modeling in Workbench
(OP)
Guys, I am having a problem using the bolt feature in Workbench. I have defined all contacts as No Penetration, but the solver gives a "Rigid Body Motion" error. Can you tell me what is wrong. I have made a simple model of two L brackets clamped together by a single bolt to test out the bolt feature,and am getting the same error.





RE: Bolt modeling in Workbench
Do you have a discrete cylindrical surface 'free in space' that you have applied your bolt load to, or have you applied it to the whole bolt shank?
Is there a nut on the other side of the grey bracket, or is it a blind hole you're threading into?
It's probably a good idea to spell out loads and constraints, as well as post the key solution file information. Also, a mesh indication might help - specifically the hole edges, and the contact surfaces. Do you have the Newton-Raphson contact convergence tools in your level of Workbench?
Cheers
RE: Bolt modeling in Workbench
The hole and the bolt are exactly the same size.I have applied the bolt force to the top circular face of the bolt head (maybe that is the problem).The nut, bolt shank and head are one solid part.I will have to check to see if I have N-R conatact convergence tool.
RE: Bolt modeling in Workbench
You will still need to remove rigid body motions somehow I suspect, but just ground one of the bracket faces to start with to make sure that it not the contact that is giving you issues. If it is the contact, try putting a finer and more uniform (matching) mesh on the contact surfaces to start with.
RE: Bolt modeling in Workbench
RE: Bolt modeling in Workbench
Yes it is.
have you any additional boundray conditions? It might ne flying off into space!!!!
workbench is a bit different from ansys classic. in that when you preload a section it places the cut plane in the middle of the section. Which may (in some cases) be in the engaged threads of your model.
www.priamengineering.co.uk
RE: Bolt modeling in Workbench
Thanks for all the help.
RE: Bolt modeling in Workbench
1. first to tighten the bolt
2. second to apply the load and extract the axial bolt force
www.priamengineering.co.uk
RE: Bolt modeling in Workbench
RE: Bolt modeling in Workbench
RE: Bolt modeling in Workbench
RE: Bolt modeling in Workbench