×
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

Can anyone help me how to calculate

Can anyone help me how to calculate

Can anyone help me how to calculate

(OP)
Can anyone help me how to calculate von mises stresses in beam elements ( i/m using beam188 in ansys) ? maybe some books or links where i can find ?

von Mises stress = (0.5*((s1-s2)^2+(s2-s3)^2+(s3-s1)^2))^0.5 according to definition, becouse s2 and s3 are 0 von miss=s1=sx is it correct?

regards

RE: Can anyone help me how to calculate

Hello,

s1,s2, and s3 are the main stresses. They depend on the state of stress you have. if you have only axial stress two of them are 0. If you have a plane stress state, you have two of them, and if you have a more complex state, you will have all 3.You can even have more than 3 if the shear stress effects are not negligible. Check on your university library for the book "mechanics of materials", from Beer, Johnston and De wolf. It is applied to structural mechanics. It focus metallic parts, but for what you want to know, it is there. The formula you stated is the Von Mises stress. You should add 6(s12^2 +s23^2 + s31^2)to the formula if you want to apply the formula to a case where shear stresses are not negligible, which is certainly not the case if you are applying only axial loadings

on http://en.wikipedia.org/wiki/Von_Mises_yield_crite... ,you can see a table with the von mises criterion solved for different load conditions



regards,
Hugo

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