Guru's,
What's the "poop" with a Buckling analysis? I have a rod with a
spherical ball on one end, and a pin hole on the other. The actual
application would have the ball end in a typical ball socket and the
other end pinned in a clevis type arrangement. I run static analysis by
holding the bottom half of the ball socket surface and applying a
bearing load on the pin hole. Stresses are very acceptable.
I do a hand calculation on the critical buckling load (
) and get a BLF (buckling load
factor, which is defined in Mechanica as the factor which multiplied by
the actual load would equal the critical buckling load) of 1.52.
I run a buckling analysis in Mechanica and it spits out a BLF of
0.45.... PLUS when I look at the displacement results, I see it's
first buckling mode going off perpendicular to what I would expect:
Doesn't seem right... I would have expected it to pivot about the pin
AXIS, not perpendicular to it. Is this somehow related to the boundary
conditions I've placed on the static model analysis? And if so, what
would be the correct constraints and loads? OR; I seems to recall
reading something a long while back, years ago, that the buckling
analysis in Mechanica isn't so correct... Any thoughts? Comments and
advice are very welcomed!
thanks in advance...
Paul Korenkiewicz
FEV , Inc.
4554 Glenmeade
Auburn Hills, MI, 48326-1766
