Restart Analysis

[Mohamedsayed]

Hello
My model crashes at step4, increment 11. The total number of steps in that model are 12 steps. So i need to restart the model again from Step4, not from the beginning.

When i opened the Abaqus/CAE, i got a message about recovering the changes, i let the software recovers these changes, now i see in the job module, the status of the job is (running).

Does that mean i do not need to restart the model and it will continue from step 4, increment 11?

 

[burningDiesel]

Recovering changes is probably recovering after a crash of the CAE, and is only recovering your .cae model file.
Did your job crash, or did it just not converge?

 

[neslon]

If you want to restart a job you need to create a restart inp () with this datalines

INP file (an example):
**---------------------
*Restart, read, step=3
** STEP: step4
**
*Step, name=step4
*Dynamic, Explicit
, 0.015
*Bulk Viscosity
0.06, 1.2
** BOUNDARY CONDITIONS
**
** Name: BC-BALLOON Type: Displacement/Rotation
set-1,1,1
**
** LOADS
**
** Name: EP-D Type: Pressure
*Dsload, op=NEW, amplitude=amp
SRF-1, P, 2
**
** OUTPUT REQUESTS
**
*Restart, write, number interval=1, time marks=NO
**
** FIELD OUTPUT: F-Output-2
**
*Output, field, number interval=5
*Node Output
A, RF, U, V
*Element Output, directions=YES
EVOL, LE, PE, PEEQ, S,
**
** HISTORY OUTPUT: H-Output-1
**
*Output, history, variable=PRESELECT
*End Step
**---------------------

Basically, what you need to include in this inp file is the first line (*Restart, read, step=3) and then go to your original inp and copy the datalines related to step4 and paste them in the restart inp.

Put this inp file in the folder of your original inp, name it whatever you want, for example restart.inp and then in a dos window and in the directory of the inp files execute the folowwing order

abaqus job=restart oldjob=name_of_your_old_ojb inter

I hope it helps.

 

[Mohamedsayed]

It crashes,

Thank you Guys for your help. So in the restart input file, i do not need to input any model data ( nodes, element connectivity, ....etc.). Right?

In other words, I just need to input the steps (*steps, loads, and output requests) which were not completed in the first time. Right?

Thanks again.

 

[neslon]

Yes, you don't need to use any model data only steps input from step nº4 until your final step.