Learning Forum

[JooJaehoon]

In static structural, when the contact condition between objects is set to frictional, movement occurs when the pushing force exceeds the maximum static friction force. When movement occurs at this time, what happens to the interaction at the contact surface in the program? No forces acting? Or does the reaction force act as much as the normal force multiplied by the set friction coefficient?

 

 

[Akshay Maniyar]

 

Hi Joo,

When the contact condition between objects is set to frictional in a static structural analysis, and movement occurs when the pushing force exceeds the maximum static friction force, the interaction at the contact surface does not cease. Instead, the nature of the interaction changes.

The force component in the tangential direction, which is the frictional force, tries to prevent the sliding of bodies over each other. According to the Coulomb friction model, the body starts sliding only when the applied force is more than or equal to the product of normal force times the coefficient of friction. When the applied force exceeds this product, the body transitions from a static state (sticking state) to a dynamic state (slipping state). Please check the below links for more details on frictional contact.

Contact Mechanics | Ansys Innovation Courses

3.9. Set the Real Constants and Element KEYOPTS (ansys.com)

Thanks,

Akshay Maniyar

 

[JooJaehoon]

[JooJaehoon]

So can I ask another question?

I am currently researching the separation of mechanical parts using ANSYS static structural.
I was analyzing the contact condition by setting it to frictional, but in static structural, I could only set the static friction coefficient.
Is there a way to set the dynamic friction coefficient in static structural?

[Akshay Maniyar]

Hi,

Please check the below KM.

Example of Static and Dynamic friction coefficient definition in Workbench. - Ansys Knowledge

Thanks,

Akshay Maniyar

[JooJaehoon]

thank you. Thanks to your response, I can plan my next step.