Element deletion using subroutine: help with element status output
Element deletion using subroutine: help with element status output
(OP)
Hi all,
I am running an explicit simulation with vuanisohyper subroutine. I've included a simple failure criterion using element deletion which seems to work well.
My problem is that I can't seem to get abaqus to change the element status from 1 to 0 for deleted elements. stateNew(k,1) is the calculated stress, stateNew(k,2) is my damage flag which equals zero when the failure criterion is reached. In the material definition in the .inp i have
*DEPVAR, delete=2
2
1,USVM,"User stressVM"
2, damage, "damage flag"
and in the subroutine I have
c Failure criterion
c
if(stateNew(k,1).gt.failurestress) then
field(k,2)=0.0
end if
c
stateNew(k,2)=field(k,2)
Can anybody spot my mistake?
Aisling
I am running an explicit simulation with vuanisohyper subroutine. I've included a simple failure criterion using element deletion which seems to work well.
My problem is that I can't seem to get abaqus to change the element status from 1 to 0 for deleted elements. stateNew(k,1) is the calculated stress, stateNew(k,2) is my damage flag which equals zero when the failure criterion is reached. In the material definition in the .inp i have
*DEPVAR, delete=2
2
1,USVM,"User stressVM"
2, damage, "damage flag"
and in the subroutine I have
c Failure criterion
c
if(stateNew(k,1).gt.failurestress) then
field(k,2)=0.0
end if
c
stateNew(k,2)=field(k,2)
Can anybody spot my mistake?
Aisling





RE: Element deletion using subroutine: help with element status output
Can You post your inputdeck and the subroutine.
I can take a look for them.
Regards,
Bartosz
RE: Element deletion using subroutine: help with element status output
Thanks,
Aisling
RE: Element deletion using subroutine: help with element status output
Thank you for the files. I see your model use submodel option.
I need also global model to run the analysis.
Regards,
Bartosz
RE: Element deletion using subroutine: help with element status output
If you have any general comments either, please, don't hold back!
RE: Element deletion using subroutine: help with element status output
RE: Element deletion using subroutine: help with element status output
Do the values of statenew(k,1) and statenew(k,2) come out as expected as the analysis progresses? How about the STATUS variable, does its value change at all? As a further check I would print the value of statenew(k,2) at the end of the 'vuanisohyper_inv' subroutine to make sure it is being passed in correctly from vusdfld.
RE: Element deletion using subroutine: help with element status output
RE: Element deletion using subroutine: help with element status output
RE: Element deletion using subroutine: help with element status output
At the beginning of the simulation all element status =1.
As the simulation progresses the failure criterion of some elements are met, setting status=0.
These elements are deleted from view immediately, so I never see any elements with status=0.
So it was working all along. and now that I look closely I can see the element erosion taking place, D'OH!