×
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

ASME Analysis

ASME Analysis

ASME Analysis

(OP)
I'm trying to analysis a pressure vessel by FEM according to ASME code, This analysis must be make with maximum shear stress theory (Tresca). It is possible analysis with NX6?

RE: ASME Analysis

Dear Richard,
The Tresca yield criterion is based on the Maximum Shear stress theory. This theory predicts failure of a material to occur when the absolute maximum shear stress (tmax) reaches the stress that causes the material to yield in a simple tension test. The Maximum shear stress criterion is used for ductile materials.
• tmax ≥ slimit/2
• tmax is the greatest of txy, tyz and txz
Where:
• txy = (s1 - s2)/2;
• tyz = (s2- s3)/2;
• txy = (s1- s3)/2
• and s1, s2 and s3 to be the principal stresses.

Hence:
Factor of safety (FOS) = slimit/(2*tmax)

In NX AdvSim you can plot the Maximun Shear stress, as well as the three principal stresses, vonMises, Octaedral and Mean stress that will allow you to assess your results according ASME requirements.

Best regards,
Blas.

 

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