Learning Forum

[Chao Ma]

hi, I'm working on a reciprocating actuator seal ring simulation. I used the axisymmetric model to explore the contact pressure of the seal ring. I gave the cylinder a downward displacement load to compress the seal (I know this is unreasonable in the axisymmetric model, but I ignored the strain effect of the cylinder). The sfe command was used to apply a penetration load to the contact unit on the right side of the sealing ring to simulate the inner cavity pressure, but the simulation always reported an error, indicating that the element on the rubber O-ring was seriously distorted.

I also noticed that the results have warnings about sudden changes in contact status

Is it a problem with the mesh quality? If so, I have run it before using a sparser grid and got complete results without reporting an error. This time I reduced the grid size of the rubber O-ring to the normal size before, but an error occurred. What is the reason?

I'd appreciate it if anyone could give me some advice!

[Akshay Maniyar]

 

Hi Chao,

Please check the below videos on O-Ring and selecting the correct contact and target side, which can help you to improve the setup.

Analysis of an O-ring Seal — Lesson 3 – ANSYS Innovation Courses

How to Designate the Contact | Ansys Innovation Courses

Also, check for the below video which suggests some corrective ways for element distortion.

How to Handle Element Distortion Errors in Hyperelastic Materials — Lesson 3 – ANSYS Innovation Courses

 

Thanks,

Akshay Maniyar

 

 

 

[Chao Ma]

Thank you! I'll study it right away and try to improve my model.