otaviobarodrigues
Student
- Feb 29, 2024
- 5
Hello, everyone.
I am currently modeling a pipe-in-pipe system using ABAQUS. In my setup, the outer pipe is fixed, while the inner pipe is deformable and undergoes buckling. For contact interactions, I have applied general/hard contact, enabling simulations with automatic stabilization. A constant damping factor works well.
When I introduce tangential frictional contact (using the Lagrange or Penalty method), some models converge, but the energy results (ALLSD/ALLIED) exhibit irregularities. This lack of smoothness is affecting the numerical results, particularly when comparing them to analytical solutions. A constant damping factor and dissipated energy fraction for automatic stabilization produces the same results.
My question is: how can I smooth the ALLSD results when friction is included? how to avoid static/stick friction?
I have attached a graph of ALLSD/ALLIE (%). In this example, the simulation does not converge, but the lack of smoothness is particularly noticeable after 1.5. Additionally, I am attaching the .inp and .fil files for reference.
I am currently modeling a pipe-in-pipe system using ABAQUS. In my setup, the outer pipe is fixed, while the inner pipe is deformable and undergoes buckling. For contact interactions, I have applied general/hard contact, enabling simulations with automatic stabilization. A constant damping factor works well.
When I introduce tangential frictional contact (using the Lagrange or Penalty method), some models converge, but the energy results (ALLSD/ALLIED) exhibit irregularities. This lack of smoothness is affecting the numerical results, particularly when comparing them to analytical solutions. A constant damping factor and dissipated energy fraction for automatic stabilization produces the same results.
My question is: how can I smooth the ALLSD results when friction is included? how to avoid static/stick friction?
I have attached a graph of ALLSD/ALLIE (%). In this example, the simulation does not converge, but the lack of smoothness is particularly noticeable after 1.5. Additionally, I am attaching the .inp and .fil files for reference.
