• Version
• 411 Downloads
• 814.69 KB File Size
• 1 File Count
• December 4, 2015 Create Date
• December 4, 2015 Last Updated

National Advisory Committee for Aeronautics, Technical Notes - Critical Combinations of Shear and Direct Axial Stress for Curved Rectangular Panels

A solution is presented for the problem of the buckling of curved
rectangular panels subjected to combined shear and direct axial stress.
Charts giving theoretical critical combinations of shear and direct axial
stress are presented for panels having five different length—width
ratios.

Because the actual critical compressive stress of rectangular
panels having substantial curvature is known to be much lower than
the theoretical value, a semiempirical method of analysis of curved
panels subjected to combined shear and direct axial stress is presented
for use in design.

An investigation was made to determine the combinations of shear
and direct axial stress that cause simply supported curved rectangular
panels to buckle. Because panels having substantial curvature are
known to buckle in compression at a stress well below the theoretical
value, the solution must be at least partly empirical. In order to
eliminate the necessity for an extensive test program, a theoretical
solution to the problem is presented and is modified for use in design.
The modifications to the theoretical interaction curves are based
upon results of tests on the buckling of curved rectangular panels
under combined shear and axial compression and incorporate results
for curved panels subjected to shear alone (reference 1) and axial
compression alone (references 2 and 3). The resulting empirical
interaction curves are expected to give a good approximation to the
actual critical combinations of shear and direct axial stress.