POST-BUCKLING CUT-OFF OF CURVED STIFFENED PANELS (COMPOSITE SKIN & STRINGER)
POST-BUCKLING CUT-OFF OF CURVED STIFFENED PANELS (COMPOSITE SKIN & STRINGER)
(OP)
Fellow Stress Engineers:
Do any of you have any references to post-buckling cut-off as applied to the above structural form? I've taken a look at the manual for the software we're using, but, as expected, it doesn't really enlighten me. I need to use engineering judgement on a low concession RF, so I need a handle on the theory.
Thanks in anticipation.
Louis
Do any of you have any references to post-buckling cut-off as applied to the above structural form? I've taken a look at the manual for the software we're using, but, as expected, it doesn't really enlighten me. I need to use engineering judgement on a low concession RF, so I need a handle on the theory.
Thanks in anticipation.
Louis





RE: POST-BUCKLING CUT-OFF OF CURVED STIFFENED PANELS (COMPOSITE SKIN & STRINGER)
by "post-buckling" do you mean diagonal tension ? if DT then i don't think there's a cut-off, failure is defined by several scenarios; possibly the best reference is the cert analysis that'll show the MS for B/P design and that'll show how touchy the design is.
Quando Omni Flunkus Moritati
RE: POST-BUCKLING CUT-OFF OF CURVED STIFFENED PANELS (COMPOSITE SKIN & STRINGER)
A note in one of our output files suggests that the "post-buckling cut-off" parameter is a limit applied to the loading to prevent debonding of stringer from skin. It appears in "incomplete diagonal tension" analysis and is derived from 1.50 & 1.25 limits on local buckling loads in compression & shear respectively. In my case I get "post-buckling cut-off" parameter = 1.4 and "post-buckling cut-off" RF = 0.97. I feel that it is very likely that engineering judgement will see me through, but I need more theory to do it...
Louis
RE: POST-BUCKLING CUT-OFF OF CURVED STIFFENED PANELS (COMPOSITE SKIN & STRINGER)
Quando Omni Flunkus Moritati
RE: POST-BUCKLING CUT-OFF OF CURVED STIFFENED PANELS (COMPOSITE SKIN & STRINGER)
RE: POST-BUCKLING CUT-OFF OF CURVED STIFFENED PANELS (COMPOSITE SKIN & STRINGER)
Quando Omni Flunkus Moritati