Learning Forum

[azzah.balqis]

Hi everyone,

I have hyperelastic simulation

I have head soil nail cover with balloon, it is inside the soil. Then I put pressure around the inner surface of balloon. I need to get balloon inflating about 2 cm.

I try to put pressure gradually, right now I reach 1,6 mm with pressure 136 kpa (it has already needed 2 days to be solved)

to get 2 cm target, it will be about 1000 kPa. but i got element distortion on balloon element and there is newton rapshon in soil element.

I have tried refine the mesh again and again but there is limited capacity of my computer. is there anything i could do to reach 1000 kPa.

Thank you

this is the model before failure

 

 

 

[Aurojyoti Prusty]

Hi,

There is various reason of the element distortion in hyperelastic materials. You can refer to the following video to adress the same.

Handling Element Distortion Errors in Hyperelastic Material Models Using Ansys Mechanical — Lesson 3 (youtube.com)

Hope this would help.

Thanks,

Aurojyoti.

[azzah.balqis]

Thank you.

I have done most of the solution in the video.

If I have newton rhapson residual in soil element but the element distortion in balloon element.

Which one should I do refine mesh? soil or balloon mesh?