Issue with Mat Law 42

Altair Forum User

Hi, 

 

I'm using Mat LAW 42 for the spinal disc in my simulations. It's important that I can use this material, since I'm using material properties from literature. So I don't want to use another material such as a foam material, ect. My issue is that the type 2 contact is somehow loosing rigidity. Please look at this pictures: 

Zero Load: 

<?xml version="1.0" encoding="UTF-8"?>

2000N Load:

<?xml version="1.0" encoding="UTF-8"?>

2000N Load when packing Vertebrea inside a RBody: 

<?xml version="1.0" encoding="UTF-8"?>

So the last image is how I would like to have it, but without choosing my vertebreas to be rigid. 

My contact settings are: 

and my Material Properties are:

Thanks for your help. Best

Jonas

 

Andy_20955

I assume the LAW42 material is the disc that is colored and Vertebrae is grey.  Are there any warning messages in your *0.out file?

 

Which is part is slave and which part is master?

 

Is there other TYPE7 contact? 

What material is the vertebrae and what element (they look like tetra) but are they 1st or 2nd order?

Thanks,

Andy