Learning Forum

[Bill Tapp]

Hey everyone,

I am struggling with the transition from Explicit Dynamic to LS DYNA. I am conducting a numerical study on FOPS structures to create a set of formulas. I am struggling with allowing material failure on the latest full version of this program(2023). How do i actually enable material failure? I am using non linear materials at very high velocities and they destroy it on Explicit Dynamic but on LS DYNA do not.

 

Cheers for your time

Bill

[Armin_A]

Hi Bill,

Did you use any failure criteria within the Autodyn (explicit dynamic)?

As far as I know, Autodyn automatically deletes elements once a strain limit is reached (provided that this option is not disabled by the user).

In Workbench LS-DYNA, when you open Engineering Data, there are several failure models available under the Toolbox. In addition, check the MAT_ADD_EROSION under LS-DYNA External Model-MAT (also available under the Toolbox) which serves to erode or delete elements once a certain criterion is met.