Learning Forum

[pv00170]

I want to use an EKILL command in Static Structural as I don't know how to import CFD results into Explicit Dynamic (seems impossible to drag Fluent-solution to Explicit Dynamic-Setup).

Therefore I am using the following code found in: "https://simutechgroup.com/performing-ekill-element-death-in-mechanical"

! kill elements (EKILL Element Death) for which nodes have values above a designated value…
!
/com, #############################################
/com, #
*get,myncmls,active,,solu,ncmls ! cumulative number of load steps
*if,myncmls,gt,0,then ! if this is after the first
cmsel,s,elem_to_kill_body ! ELEMENT component to be checked
nsle ! nodes on these elements
SELTOL,1.0e-12 ! stay within range below
! #########
nsel,r,s,eqv,230,2000000 ! re-select nodes with results above a value <<<
! #########
SELTOL ! selection tolerance back to default
*get,numnode,node,,count ! how many nodes with result above?
*if,numnode,gt,0,then
esln ! elements with any node selected
*get,numelem,elem,,count
*if,numelem,gt,0,then
ekill,all
*endif
*endif
allsel
*else
! if first load step, have result written to in-memory database
fini
/config,noeldb,0 ! write results into the database
/solu ! continue with solution
*endif
/com, #
/com, #############################################
!

I have never used APDL but I assume that the following lines have to be ammended:

cmsel,s,elem_to_kill_body ! ELEMENT component to be checked

In here "elem_to_kill_body" I have to substitute with my Named selection to be checked

nsel,r,s,eqv,230,2000000 ! re-select nodes with results above a value <<<

In here I have to change "r,s,eqv,230,2000000" in order to check stresses above a definned value

I want to delete cells with stresses greater than a value, how should I change the previous command?

Thank you,

[Erik Kostson]

Hi

 

See the help manual (command reference) and the nsel command for more details.

Also see this as the nsel command you have is taken from here:

https://simutechgroup.com/performing-ekill-element-death-in-mechanical/

All the best

Erik

[pv00170]

Hi Erik, I have also another question: does this APDL only work when using "Large deformations"?

[Erik Kostson]

Hi

The nsel command just selects some nodes, do not believe there is such a restriction. Again the help manual would mention it, so have a look there.
All the best

Erik