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how can we add friction in ptcv advance joint. I see no option here
Thanks and regards
Hi @deepak3139 ,
Friction can only be added to the following non-compliant joints - Ball, Revolute, Translation, Cylindrical, and Universal. What is the PTCV joint attached to? Possible workarounds would be to model a nonlinear force that behaves as friction on the component. OR you can model a contact entity between the two parts and apply friction.
Best,
Christopher Fadanelli
Hi @Christopher_Fadanelli,
If friction can only be added to non-compliant joints such as Ball, Revolute, Translational, Cylindrical, and Universal joints, is it possible to use a compliant joint to represent the friction behavior of a joint?
My current approach is to model the joint as a compliant revolute joint. I plan to assign a stiffness of approximately 1×10⁵ to the five constrained DOFs, while keeping the rotational stiffness about the joint's Z-axis equal to zero. Then, I would tune the compliance parameters (stiffness) of Z rotational axis to reproduce the joint's friction characteristics.
Would this be a reasonable approach, or is there a more appropriate way to represent friction when a compliant joint is required?
Thanks!!!
Hello @tonynguyen_1432, friction is the equivelant of compliant joint's damping. We want the force to be affected by the velocity of the joint (like friction does). Other than that, this is a valid approach and is commonly used. Just keep in mind that the constrains applied by the joints will be force constrains (linear to the stiffness you will apply) and not motion constrains. Hope this helps! Best regards, Orestes
Thank you!!
