Learning Forum

[Suresh Varma]

hello, i am unable to converge the solution of an non linear problem where I use a thin glass to bend onto to solid body which is fixed. 

 

 1/4 system taken for solving using symmetry regions and with a mesh size of 0.02 m.

 

I am using frictionless contact and with a fixed top surface of sub-structure and surface pressure on the bottom face of the thin glass.

[Sampat Kumar]

Hi Suresh, 
Have you checked the large deformation is "ON"? How many substeps you have used for this simulation? 

Regards,
Sampat

[Suresh Varma]

hello sampat yes i have used the large delfections on and i have tried using 10, 50, 100 substeps.

[Erik Kostson]

 

 

Hi

See this discussion for help with convergence (go through all of the video).

https://www.youtube.com/watch?v=sZf5p_evqOk

https://www.youtube.com/watch?v=O-qTAiE8Kdo

Finally I would apply the pressure on the surface load and consider making the curved part rigid body instead of fixing all displacements. Also consider using 1/2 symmetry so you have both sides (so mirror it along XY plane) of the rigid form and the glass panel.

All the best

Erik

 

 

[Sampat Kumar]

 

Hi Suresh, 
As Erik correctly mentioned, using 1/2 symmetry and the application of the boundary conditions will help you get the required convergence result. Also, you can follow the attached video, which will help you understand better.

Apart from this, I am suggesting some points that might be helpful to simulate this problem. Please change some contact settings and let me know if it worked or not. 

1. Make the contact behaviors Symmteric and apply the trim contact “off”. 
2. Turn off the ” small sliding”
3. Select the Add offset, and Ramped effect in the interface treatment. 
Please let me know if these settings helped you get the required convergence or not.

Regards,
Sampat

 

 

[Suresh Varma]

Hello dear Erik and samapat ,

I have edited it and changed some contact changes but still i cannot converege the solution. so i have attached link to the file here may be this would help understand. I will go through the video provided and anlayse much further now.

https://drive.google.com/file/d/1s6P5xV916IbAyE8BqrEDGtM8HXun7gQU/view?usp=sharing

Thank you 

with best regards 

Suresh varma. 

[Sampat Kumar]

Hi Suresh, 
We Ansys employees are not allowed to handle external data or eternal links. Outside of the Ansys employees can help you with the file. You can go through the video that Erick mentioned. 

Regards,
Sampat

[Suresh Varma]

hello Sampat, thank you for the update my main issue here I guess is that my top body even with symmetry the body is not getting constraints and moving in different directions. so, is it good if I create a hollow box around it initially and use that body as a solid rigid body?

Thank you 

Suresh varma.