×
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

Maximum plastic strain for low carbon steel ?

Maximum plastic strain for low carbon steel ?

Maximum plastic strain for low carbon steel ?

(OP)
Hi All

I have a low carbon steel wire , 1033 , which when I applied a tension test on it , and from the force displacement curve I got the true stress-strain curve , but I wonder why the maximum strain that I have got is 0.14 , in which as in the test , the wire breaks, but in standards and some other resources , I see this material has a maximum true strain of 2 , to calculate the true stress - true strain I have used all the instructions that is in every related source :

true stress = eng stress*(1+strain)

True strain=ln(1+eng strain)

RE: Maximum plastic strain for low carbon steel ?

just one sample?

RE: Maximum plastic strain for low carbon steel ?

(OP)
Thank you

That link has exactly what I did ! no I did 3 samples, 3 diameters, but in all of them I have calculated the max true strain low, not close to 2 , would you tell me, what could be the reason ?

RE: Maximum plastic strain for low carbon steel ?

Hi

I think on page three of the link it shows a graph of true strain and engineering strain, so assuming I am not misunderstanding what I read the true strain appears to be an ideal theoretical case but because of work hardening within the material and other flaws or inclusions the strains don't quite match.

“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein

RE: Maximum plastic strain for low carbon steel ?

(OP)
Thank you all

the problem was from my side , i am sorry , I had written LOG instead of ln in excell

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