Bending stress from 2 bending moments in different planes
Bending stress from 2 bending moments in different planes
(OP)
Hi!
The problem is the same as this (though with a circular cross section):
Link
How to calculate this?
Do I take the resulting moment vector and calculate bending stress, or calculate both separately and add them together?
Thanks for any help!! :)
The problem is the same as this (though with a circular cross section):
Link
How to calculate this?
Do I take the resulting moment vector and calculate bending stress, or calculate both separately and add them together?
Thanks for any help!! :)





RE: Bending stress from 2 bending moments in different planes
if you use moment components and add you run the risk of being (unknowingly) conservative. Mx*r/I +My*r/I is conservative (why?).
the "proper" way is to maximise the function Mx*r*cos(theta)/I +My*r*sin(theta)/I ... using the reulstant M is much easier !
Quando Omni Flunkus Moritati
RE: Bending stress from 2 bending moments in different planes
RE: Bending stress from 2 bending moments in different planes
if so, I think the answer would be the same either way (superposition).
RE: Bending stress from 2 bending moments in different planes
RE: Bending stress from 2 bending moments in different planes
this is correct, though i think apply the resultant moment is more intuitive. this is a special case, 'cause the round section has no "special" direction for the major/minor principal axes.
Quando Omni Flunkus Moritati
RE: Bending stress from 2 bending moments in different planes
RE: Bending stress from 2 bending moments in different planes