Learning Forum

[Riccardo Petrelli]

I'm using this EKILL script to kill the stiffness of elements that reach a certain threshold, but I don't want this to go to 0 but to decrease by 0.7, I saw that the ESTIF command exists, but I don't know where to insert it. Help? this is for a compression test

 

total_steps=10
subst_int=10
subst_max=20
subst_min=10

 

*do,i,1,total_steps
  /gopr
  time_step=i/total_steps
  time,time_step
  nsubst,subst_int,subst_max,subst_min
  outres,all,all
  esel,all
  solve
  finish

  /post1
    set,last
    
!    esel,s,live
!    *get,live_count%i%,elem,0,count
!    esel,inve,live
!    *get,dead_count%i%,elem,0,count
             
    esel,all
    etable,stress,s,eqv
    esel,s,etab,stress,ARG1
!    *get,stress_ecount%i%,elem,0,count
    cm,kill_stress%i%,elem
    cmsel,s,kill_stress%i%,elem
!    *get,stress_ecount%i%,elem,0,count

    esel,all
    etable,strain,epto,eqv
    esel,s,etab,strain,ARG2
!    *get,strain_ecount%i%,elem,0,count
    cm,kill_strain%i%,elem
    cmsel,s,kill_strain%i%,elem
!    *get,strain_ecount%i%,elem,0,count
    
    allsel
    cmwrite,kill_list,cm
    parsav,all
  finish
  
  /solu
    antype,,restart
    parres
!    *status   
      /input,kill_list,cm
    *do,k,1,i
      ekill,kill_stress%k%
      ekill,kill_strain%k%
!      *status
    *enddo              
*enddo

finish

[Erik Kostson]

Hi

 

It can come in the /solu, just before the ekill command.

Hope this helps

Erik

[Riccardo Petrelli]

 

Is this correct:

estif, 0.8  

/solu
    antype,,restart
    parres
!    *status   
      /input,kill_list,cm
    *do,k,1,i
      ekill,kill_stress%k%
      ekill,kill_strain%k%
!      *status
    *enddo              
*enddo

finish

 

 

 

 

[Riccardo Petrelli]

[Erik Kostson]

No thats is not correct we said in the /solu (it is outside) and before the ekill so:

/solu

...

...

*do,k,1,i

estif,..

....

 

[Riccardo Petrelli]

Thank you very much, i love you

[Riccardo Petrelli]

why this error?

[Riccardo Petrelli]

don't work it

[Erik Kostson]

 

See the help manual (command ref.) – this command needs an Enterprise licence.

All the best

Erik

 

[Riccardo Petrelli]

I have the last question to ask you, thank you for all the answers, tsai saving my life. if I want to reduce the stiffness by 50%, is it right to enter ESTIF, 0.5? Thanks again

[Erik Kostson]

Never used it, but since it is a multiplier it multiplies the element stiffness matrix with 0.5 so you get half of the element stiffness I suppose when you put 0.5 in the command.