×
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

bilinear constitutive law

bilinear constitutive law

bilinear constitutive law

(OP)
hello

Does anyone know how to define a bilinear constitutive low in Abaqus?  

RE: bilinear constitutive law

linab,
It is very simple. First thing is to convert from engineering stress and strain to true stress and strain. Following formulas will help:
Stu=Su(1+e)
et=ln(1+e)
I think the symbols are self explanatory. ABAQUS asks for two points to define the bilinear curve. Of course one point (0,0) is already known. Therefore add the following points:
0, Sy
et, Stu.

Gurmeet

RE: bilinear constitutive law

(OP)
10x for ur answer,

but i didnt find a material that can define it.i can only approach it by an hyperelastic material. How can we enter the curve except by a subroutine?

Lina

RE: bilinear constitutive law

Pick plasticity. It will allow you to enter true stress and true strain in a tabular fashion.

Gurmeet

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