Abstract
This work presents the results of an experimental investigation on stringer-stiffened panels made of carbon fabric reinforced plastic. Three different panel configurations have been considered, namely, a flat panel configuration and two low curvature panel configurations with radii of 1500 mm and 3000 mm, respectively. The constructive characteristics of each configuration were optimized in such a way that the panel weight is minimized and the structure is capable to work in post-buckling without switch in buckling modes and/or significant load gaps. Two specimens for each panel configuration were manufactured by Agusta. The initial geometrical imperfections were measured and subsequently analyzed on the unstiffened surface of the specimens. Thereafter, axial compression tests were performed up to collapse. Experimental data, which were acquired during the tests, demonstrated the strength capabilities of the identified structures to operate in postbuckling, allowing further weight savings.
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