Structural Efficiency and Post-buckling Strength of J- and Hat-stiffened Composite Panels

Abstract

The aim of this study was to explore post-buckling strength potential of two different stiffener types and evaluate structural efficiencies of those by making a comparison. This has been done by first determining the buckling and post-buckling behavior of J-and hat-stiffened composite panels under compression loading. By making a structural efficiency definition, the experimental results of J-and hat-stiffened panels for initial buckling and post-buckled responses of the panels were compared with predicted and analytical results.

Evaluating the compressive strength of stepped scarf repaired single stiffener composite panels

“…The mode of failures is shown in Figure 9. The expected debond of skin/stiffener was evident, [21][22][23][24][25] as well as the failure of the stiffener (crippling) at the 45°ply. 24,25 Similar failure at the 45°ply, and delamination was observed at the skin as well.…”

“…The expected debond of skin/stiffener was evident, [21][22][23][24][25] as well as the failure of the stiffener (crippling) at the 45°ply. 24,25 Similar failure at the 45°ply, and delamination was observed at the skin as well. The panel failed due to the crash of the stiffener.…”

Effect of the stiffener stiffness on the buckling and post-buckling behavior of stiffened composite panels – Experimental investigation

“…Zimmermann et al [20] studied experimentally the buckling and post-buckling behaviors of stiffened composite with different skin thickness and different T-stiffener number. Elaldi [21] compared the post-buckling strength and structural efficiencies of J-shape and hat-shape stiffened panels through experiments. Bisagni et al [22] performed the buckling and post-buckling tests on the cylindrical shells stiffened by different stringer number under compression load.…”