×
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

How to Change Young's modulus in during unloading Step in ABAQUS

How to Change Young's modulus in during unloading Step in ABAQUS

How to Change Young's modulus in during unloading Step in ABAQUS

(OP)
Dear all,
I am new to abaqus. I want to change the Young's modulus in during unloading Step in my non-linear kinematic hardening material. I have tried field variable which changed when I see in ABAqus Viewr, BUT unfortunately, I did not see any influence on Stress-strain curve before and after applying field variable. I also tried to change it by using subroutine as mentioned in this link (http://www.eng-tips.com/viewthread.cfm?qid=295995) but no use. In simple words I just want to see the effect of young's modulus while unloading. (i.e after decreasing its values from 300GPa to 150Gpa) it should show some effect in slop.
I have prepared a very simple model which takes some seconds to complete.
I will be really thankful if someone could tell me:

1)how can I different E dependent on PEEQ?
Or Simply
2) How can i use different E on each step.
LINK to my sample example= http://files.engineering.com/getfile.aspx?folder=b...
OUTPUT= http://files.engineering.com/getfile.aspx?folder=7...
Thanks in advance
regards,

RE: How to Change Young's modulus in during unloading Step in ABAQUS

- Make you material pure elastic for the tests
- Define an initial condition and set the variable to 1
- Output RF2 at the node with the enforced displacement and look at that
- Consider a dummy step in between were only the FV is modified
- A full integrated element might be better suited for this test

RE: How to Change Young's modulus in during unloading Step in ABAQUS

(OP)
Dear Mustaine3,
Thanks for your such a nice and brief response. I have followed your given instructions and saw change in One Element test (although quite minor) BUT when I applied the same method to my real simulation, it did not give me any change in behavior. I am uploading my .inp file (LINK: http://files.engineering.com/getfile.aspx?folder=8... ). It will take only 30min to complete. I am also uploading results before and after the change of E which are SAME. I was expectecting more softening but unfortunately I did not get. I have also tried it to fully 3D model with fully integrated elements.


regards,

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