Experimental Studies on Buckling of 7075-T6 Aluminum Alloy Integrally Stringer-Stiffened Shells
Abstract
An experimental study of the buckling of closely spaced integrally stringer-stiffened cylindrical shells under axial compression was carried out to determine the influence of shell and stiffener geometry on the applicability of linear shell theory. 38 specimens fabricated from 7075-T6 aluminum alloy with different geometries were tested. Most test specimens were designed to fail in general instability and under low critical stresses to assure elastic buckling. Agreement of experiments with linear theory was found to be governed primarily by the stringer area parameter, (A(1)/bh) and the shell geometry parameter, Z. Values of linearity, rho, (ratio of experimental buckling load to the predicted one) higher than 80% were obtained in the ranges Z>1000 and (A1/bh)> 0.5 and a clear trend towards rho = 1 was observed with increasing values of these parameters. Correlation with linear theory was also found to be influenced by panel unstable postbuckling behavior.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1971
- Accession Number
- AD0740546
Entities
People
- Josef Singer
- Tanchum Weller
Organizations
- Technion – Israel Institute of Technology