Buckling of compression plate in composite section

[malbek]

Hi All,

I have an unusual problem which I am trying to get some guidance on. I have a composite section which is being used in bending. The section comprises a glass fibre and mineral wool filled core with thin steel plates bonded either side. I am trying to establish how much buckling restraint the core will give to the plate in compression. Given the compressive stiffness of the core and adequate bond, I am looking for a means of estimating the transverse restraint that the core would provide to the plate between its edge restraints. I could then estimate any extra capacity beyond that for a plate with similar edge restraint conditions but no uniform transverse restraint to the plate surface. Any Guidance anyone can suggest for this would be much appreciated!

Thanks,
M

 

[prex]

I would start by using the formulae for buckling in a column with lateral elastic restraint, that are found in many books on elastic stability (Timoshenko&Gere 2nd ed.has it in 2.10).
Don't know if something similar exists in the literature for plates, but the analysis as a beam for bending in one direction only should give a reasonable estimate.

prex

http://www.xcalcs.com

: Online engineering calculations

http://www.megamag.it

: Magnetic brakes and launchers for fun rides

http://www.levitans.com

: Air bearing pads

 

[malbek]

Thanx prex, I'll check these out.

 

[rb1957]

you could consider the two faces alone (the core is effectively a spacer) ... you could calc I (per inch width), t*d^2/2, and a column allowable.