Which subroutine can be used to obtain reaction forces of a node at the end of each increment? 2

[alima2065]

Hi,
I need to know the reaction forces of a specific node at the end of each increment to use it in other subroutines. I found that URDFIL could be a solution but it was difficult to manage it and I could not find a good tutorial to explain how it works. Do you know any other method (subroutine, routine, etc. )that can extract reaction forces?
Thanks in advance,
Mohammad Ali

 

[FEA way]

URDFIL seems like a good choice (best source of information about it - "Abaqus User Subroutines Reference Guide"). However, it should be also possible to use UEXTERNALDB for this purpose.

 

[Mustaine3]

When you define the output request as sensor, then it is also passed into UAMP.

 

[alima2065]

Dears FEA way and Mustaine3, thanks for your reply.
The method suggested by Mustaine3 was easy to implement but the sensor's results show a very minor difference with the ODB (e.g., ODB:39709.1 sensor:39710.7460937500 ). I have no idea about the source of this mismatch.

Regarding the UEXTERNALDB, could you please give more information. I have used it before for using the external database to read data. However the documentation noted that it can also be used to calculate or read history information at the beginning of each increment, I could not find any example. Should I call a routine?

 

[alima2065]

Ok, the mismatch was because of this fact that there was no more increment after the last increment. So the data of the sensor was not read for the last increment.