×
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

Low cycle fatigue analysis. HELP!!

Low cycle fatigue analysis. HELP!!

Low cycle fatigue analysis. HELP!!

(OP)
Hi, i'm trying to run a low cycle fatigue analysis of an osteporotic bone fracture with a fracture plate and some screws on abaqus 6.10.
Im trying to evaluate the stiffness loose of the system.
I defined the young's modulus in the elastic behaviour of the bone; then i defined some points of the plastic behaviour of the bone (yield stress= 2 Mpa).
Then i wrote in the keywords editor, in the material properties: "*DAMAGE INITIATION, CRITERION=HYSTERESIS ENERGY", and i introduced the constants c1 and c2 (41.6e-6 and -1.433).
I defined a variable force and took information about the displacement of a point for evaluating the stiffness lost.

The system lost stiffness for thre cycles and then, the displacement of the point stablished; but i want that the system keep loosing stiffness for about 1000 cycles.

How can i do that? I'm doing someting wrong? what values of the parameters should i write? and do i need to define a damage evolution?

Thanks a lot for your help!

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