Von Mises Stress

[k111er]

Can anyone suggest a reference for a simplified definition of Von Mises Stress (preferably one that does not require vector math, or use of a Mohr Circle) I need to be able to explain this to non-engineers...
Your help would be appreciated.

 

[CoryPad]

The link below provides introductory information. It isn't very good, but maybe it can be a start for you.

http://www.efunda.com/formulae/soli...riteria/failure_criteria_ductile.cfm#VonMises

 

[k111er]

Thanks, CoryPad. I've been checking the efunda site today, and had found that as well. If you come across anything else suitable, please let me know.

 

[brad]

The following definition was essentially stated on the website mentioned above. This is what I have used to explain Von Mises to engineers and some nonengineers. I'll use engineering terms in parentheses. This is not rigorous, but it's accurate.

"Materials are generally tested by stretching a piece of metal (a uniaxial tension test). Real parts have much more complicated loads--twisting, bending, shearing, etc. Von Mises stress is a calculation which takes these complicated loads and figures out what their stretching (uniaxial tension) equivalent is. With this Von Mises stress, people can compare complicated loading (stresses) in a part to the simple values (uniaxial tension) which are published in books)."

Brad