Model a cylindrical peg

[ConorWalsh]

hello all,


I am currently trying to set up a contact model to model a cylindrical peg being inserted into a cylindrical hole in 3 dimensions and monitor the contact forces and moments on the peg based on various lateral and angular misalignments.


I am planning on modeling the peg and the hole as solid models and using the contact wizard for the conatct analysis. However the device that is holding the peg, a simple end-effector, is designed with a shell elements at the base and so the need to be able to model the solid to shell conection.


I see that shells have 6dof at each node, three translation and three rotation, and solids have only have three translation ,UX,UY,UZ and I am thinking that the loads will not be transferred correctly.


I have the endeffector platform as shell elements as I exploit the three rotational dof to make simple ball joints by releasing the degrees of freedom of the applicable nodes. I.e. free to rotate in RX,RY,RX and I have 6 beams connecting via these 'ball joints' to the base plate. The end-effector is similar to the stewart platform with a top and base plate and 6 legs (beam elements) connecting the two via ball joints.


I hope you can help
Thanks in advance


Conor

 

[brad]

A good start is to state what program you are using; the correct answer to your question is often program-specific.

Brad

 

[ConorWalsh]

Hello

I am using Ansys 6.1

Regards
Conor