User Subroutine

[barney75]

Hi guys,
I'd like to specify the maximum time increment of a step while the step is running. I mean, I'd like to implement a subroutine that after a step increment is finished, some outputs are extracted from the fil, then I perform some calculation with this outputs then on the basis of the results I'd like to impose the time increment of the next step increment inorder to increase or decrease it as a function of the calculation results. Is it possible?
I hope it is clear.

Thanks
Bye

 

[guru64]

UEXTERNALDB : This subroutine is called at the end of every increment. You can call other programs from this.

URDFIL : This reads the file file.

So in principle you can read the fil file and and do some calulcations on the field values. But to set the time increment.? anyone knows?

 

[barney75]

Any suggestion guys?

Bye

 

[xerf]

Maybe a combination of ABAQUS Scripting Interface(ASI) and RESTART might work. You can use ASI to script model generation/update and to extract data from the .odb files.

 

[barney75]

Hi guys,
thanks for the answers.
Actually I'd like to avoid so complicated procedure using restart....therefore at the end of the day no user subroutine for the scope to impose directly the step increment :-(

See you

 

[potf]

Hi,

that's exactly the purpose of the variable DTIME in the subroutine URDFIL mentioned by guru64.

 

[barney75]

Hi potf,
yes u are right. I read only the overview and so I missed that one....always read till the end of the page!!

Thanks a lot guys

Bye