Comparison of Radioss Interfaces


This article provides a comparison of the various Radioss interfaces. 

 

Here is a table comparing Lagrangian contact interfaces:

 

Here is a table comparing ALE interfaces:

 

The behavior of a Type 2 interface changes based on the selected SpotFlag parameter.
Based on the SpotFlag parameter, a tied interface can have failure defined and even switch to penalty formulation, as opposed to being a kinematic constraint. Below is a table comparing all the available options for the SpotFlag parameter in /INTER/TYPE2

 

Regarding the choice between Spotflag = 27 or 28:

 

 

Below is a link to the "Contact Definition for Crash Analysis" YouTube video comparing interfaces as well:
https://www.youtube.com/watch?v=kQnMhFM9iAE

This video covers the following topics: