×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Stop criteria on Abaqus

Stop criteria on Abaqus

Stop criteria on Abaqus

(OP)
Dear collages:

I'm performing an analysis of a bolted connection, and I want to know if it is possible to define a criteria of maximum deformation (and then, the analysis stop). For example, about the maximum deformation of the bolt. I send to you in attach a screenshot about results that I have (and the analysis is yet running... Thank you very much.

RE: Stop criteria on Abaqus

or if you are using explicit:

Halting the analysis when the extreme value criterion is met
You can choose to halt the analysis when the extreme value criterion is met. The analysis will stop at the end of the increment following the one in which any of the specified element or nodal variables exceeded the prescribed bounds.
Input File Usage:
Use the following options:

*EXTREME VALUE, HALT=YES
*EXTREME ELEMENT VALUE and/or *EXTREME NODE VALUE

RE: Stop criteria on Abaqus

(OP)
Dear friends:

Thank you very much for your responses. Could you please tell to me additional information about the both two procedures: to develop a subroutine and to perform an explicit analysis (if I have made all the model as implicit)?

Thank you very much.

RE: Stop criteria on Abaqus

(OP)
Dear collages:

I have some questions about the use of subroutines. Is it possible to define a subroutine into Abaqus CAE? If not, how it could be defined, in the *.inp file? As mentioned, my interest is to stop the analysis when a level of deformation is reached on elements. Is it possible to define these elements through the instance where they procede? In my model I have 3 different materials (the bolt, the plate and the profile), with a lot of elements, and I want to define a maximum level according to the material of each instance.

Thank you very much. Regards,

Juan José

RE: Stop criteria on Abaqus

Hi,

The thitd option is to use *FILTER keyword. Unfortunatly it works only with Abaqus/Explicit.
For details see Abaqus documentation: Abaqus Analysis User's Manual, 4.1.3 Output to the output database, Filtering output and operating on output in Abaqus/Explicit, Stopping an analysis when an output variable reaches a prescribed limit.

Subroutines are write with FORTRAN and if you do not have experience it can be difficult at the beginning.
You need to choose any subroutine which have access for outputs, see Abaqus User Subroutines Reference Manual:
- 2.1.6 Obtaining material point information in an Abaqus/Standard analysis
- 2.1.7 Obtaining material point information in an Abaqus/Explicit analysis
- 2.1.9 Obtaining node point information
Next as "IceBreakerSours" alrady mentioned you can use XIT routine (see
2.1.15 Terminating an analysis) or STDB_ABQERR (see 2.1.14 Printing messages to the message or status file) to stop the analysis.

You can also use UAMP subroutine + sensor output and use lFlagsDefine(iStopAnalysis) argument.

Regards,
Bartosz

RE: Stop criteria on Abaqus

(OP)
Dear collages,

Thank you very much. Dear sdebock: could you please give me more information about how to use a halting? How do you specify this in the input archive, you write it? And how do you send the model (I'm a CAE user).

Thank you very much. Regards,

jJ

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources