Difference between vonmises and maximum principal stress
Difference between vonmises and maximum principal stress
(OP)
Hi
I need to know two things..
1.what is the difference between vonmises and maximum pricipal stress.
2.I heard that vonmises is apt for static analysis and max. principal is for dynamic analysis..Why?
Hope you guys will help me to understand the concept.. thank u verymuch in advance
I need to know two things..
1.what is the difference between vonmises and maximum pricipal stress.
2.I heard that vonmises is apt for static analysis and max. principal is for dynamic analysis..Why?
Hope you guys will help me to understand the concept.. thank u verymuch in advance





RE: Difference between vonmises and maximum principal stress
1) look it up in any text
2) no idea, never heard it. both are failure criteria, wys of combining stress components together to get a scalar stress to compare to an allowable.
the biggest difference between them is that vM is strictly an elastic stress (ie up to yield) but is often applied (conservatively) to ultimate. max principal has no such limitations (it's just a vector combination of stress components).
RE: Difference between vonmises and maximum principal stress
Han primo incensus
RE: Difference between vonmises and maximum principal stress
RE: Difference between vonmises and maximum principal stress
I can't say that I'm in a field (civil / structural) where I look at principal stresses very much. However, it may be that the directionality of the principal stresses make it more important for other failure states (fracture, buckling, et cetera).
RE: Difference between vonmises and maximum principal stress
RE: Difference between vonmises and maximum principal stress