Fpenmax is only applied on initial penetration?

gslee

Hi,

 

I learned that when initial penetration is too deep, Fpenmax is applied.

 

'The node stiffness is deactivated if the Penetration ≥ Fpenmax * Gap, whatever the value of Inacti.'

 

In above sentence, 'Penetration' is only initial penetration or any penetration?

 

Thanks.

 

Simon Križnik

Hi,

 

Fpenmax is the maximum fraction of initial penetration. 

To deactivate node from interface during simulation (to avoid deep penetrations leading to timestep drop) use dtmin in contact definition or interface minimum time step entered in /DT/INTER/DEL.

gslee

Thank you so much.

 

I thought that Fpenmax is applied on all penetrations at every contact.