Learning Forum

[Ben_Ben]

I am inflating a bag like structure with a pressure. As seen here: bag before and after inflation

It needs to contact with several other bodies. However, it fails to contact with some of the bodies. 

Here is an example of a successful contact: Before and After

Here is an example of an unsuccessful contact: before, during and after 

Both of the bodies are marked as targets with the inflated bag as the contact. The contact is a simple frictional contact. I have tried frictionless but this didn't help. 
Here are my contact settings:


Thanks, 

Ben

[Ram Gopisetti]

Hi, i am not aware if you use any single surface airbag contact in your model, if not use it, 

increase the stiffness factors by using the lsdyna contact definition. 

cheers, ram 

[Ben_Ben]

How do I find the lsdyna contact definition? I haven't used single surface airbag contact in this model. 

I'm using Workbench LS-Dyna are these availble? 

[Ben_Ben]

I have found the lsdyna contact definition, what settings are you suggesting I change?:


I am still using normal contact not single surface airbag contact

Are you referrring to the airbag option under LS-Dyna Pre?:

[Ben_Ben]

I got the contact to work by using a soft constraint formulation. Not sure why, but it works now.