Local Buckling of thin shell NACA airfoils
Local Buckling of thin shell NACA airfoils
(OP)
Can anyone point me to empirical or analytical local buckling of unstiffened and stiffened thin shell NACA airfoils under bending and/or torsion and other types of loading.





RE: Local Buckling of thin shell NACA airfoils
I would also need to know the material your wing/strut/? is made of.
Steven Fahey, CET
"Simplicate, and add more lightness" - Bill Stout
RE: Local Buckling of thin shell NACA airfoils
Thanks, I am talking of extruded one piece thin-walled (unstiffened) hollow NACA shaped profile. I am looking for local bucking design criteria for the minimum thickness of the skin thickness with respect to profile section geometry.
I have found data for elliptical, D shaped, tubes etc. but not for actual NACA profiles. I could use elliptical section for approximation the data I have found was for bending with respect to the minor radius of the elliptical section, while I am looking for bending with respect to the major radius of the elliptical section which is the weakest.
RE: Local Buckling of thin shell NACA airfoils
Also, check out Bruhn, Chapter C4, assuming we are talking about a strut, I would specifically send you to section C4.15.
If all else fails, there's the Needham and Gerard methods (Bruhn Chapter C7), etc.
Good Luck,
--
Joseph K. Mooney
Director, Airframe Structures - FAA DER
Delta Engineering Corporation
RE: Local Buckling of thin shell NACA airfoils
Edition of Roark?
Edition of Bruhn (printing year)?
RE: Local Buckling of thin shell NACA airfoils
Did you mean table 10.1 for torsion? If so this is not dealing with local buckling (elastic instability). I looking for elastic instability in bending (mainly) and in torsion.
RE: Local Buckling of thin shell NACA airfoils
Jacobs Publishing, Inc.
10585 North Meridian St. Suite 220
Indianapolis, IN 46290
Ph: (317) 844-9400
Oh yea, and 7th edition of Roark & Young.
Hope this is of help,
--
Joseph K. Mooney
Director, Airframe Structures - FAA DER
Delta Engineering Corporation
RE: Local Buckling of thin shell NACA airfoils
Thanks.