Buckling of Triangular Plates 2

[TDI]

I have a shear panel which approximates a triangle in shape, height a, base b. I want to find the critical shear buckling stress.
I have some buckling curves for rectangular panels in shear but I think if I idealise my triangular panel as a rectangular panel of dimensions a and b then that will give me a very conservative result.
I seem to recall a method of idealising the triangular panel as a rectangular panel of dimensions 0.67a and 0.67b ie a smaller rectangle, and then using the buckling curves for a rectangular panel to estimate my buckling stress.
Can anyone suggest a better method?

 

[Sparweb]

Could you elaborate on how the panel is being loaded? I keep picturing your structure looks like a gusset, or a covered truss. Is that right?


Steven Fahey, CET

 

[SWComposites]

Use a finite element model, with carefully selected boundary conditions and applied loads.

 

[Lcubed]

I doubt you actually have a triangular shear panel. Have you tried putting shear flows on the edges and achieving translational and rotational balance?

 

[MNLiaison]

"Handbook of Structural Stability - Part I" by Gerard and Becker, NASA TN 3781, has a section on buckling of flat triangular plates loaded either in shear or compression. Download from the NASA Tech Server,

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19930084505_1993084505.pdf

Regards.