## General Mechanical

#### setting of frictional contact

• Maroš Mojto
Subscriber
Hi all,

I would like to know whether it is possible to define contact on the base as a normal deformation of contact itself. Let's say we have an ideal model where are ideal (without gaps/penetrations) frictional contacts. However, I need to apply imperfections that may be in the form of existing gaps between selected contact pairs.

See attached figure, where you can see my problem. It is about two conical tubes that are slipped together.

Do is anyone have an idea how to process it?

thank you

assembling

lower part

upper part

• Ashish Khemka
Ansys Employee

Hi,

As long as you have the two bodies modeled as separate entities – you can define frictional contact between them.

Frictional Contact | Ansys Innovation Courses

Regards,

Ashish Khemka

• Maroš Mojto
Subscriber

Hi,

Thank you for your answer, but I explained it not clearly. I attached the figure to make it more clearly.

I already have a valid frictional contact between the two separate solids. But I want to define the gap (distance) between these surfaces. As I said, these surfaces are parts of two separate solids. What I want to do is include the mathematical distance between this surface. If the global deformation of the solids and their surfaces causes these two surfaces to come together by this defined distance, the contact after that will be active. But if the deformation is less than this distance, it will behave as non-contact.

• Ashish Khemka
Ansys Employee

Hi,

If you are modeling the gap in the geometry then use a pinball radius to set proper detection for contact.

Be a Pinball Wizard with Contact Regions in ANSYS Mechanical - PADT (padtinc.com)

Regards,

Ashish Khemka

• Maroš Mojto
Subscriber

Hi,

Yes, it is true.

But I do not know how to create this gap without changing the model in SpaceClaim.

I put this question on the table because I have an experience with another FE software, and there was a possibility to define the activity of contact according to the deformation between the contact surfaces.

thank you
Maroš