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The research was conducted under project No. 2021/41/B/ST8/00148, financed by the National Science Centre, Poland. This research was funded in whole or in part by National Science Centre, Poland [2021/41/B/ST8/00148]. For the purpose of Open Access, the author has applied a CC-BY public copyright license to any Author Accepted Manuscript (AAM) version arising from this submission.
The purpose of the research was to analyze the experimental-numerical influence of the type of cross-section on the
stability of thin-walled composite columns with closed (rectangular) cross-sections. The subject of the investigation
was thin-walled composite structures made of CFRP composite (carbon fiber reinforced polymer), characterized by
a closed rectangular cross-section shape of the profile and a identical ply configuration. In this study, experimental
and numerical investigations of axially compressed columns were performed to determine the values of buckling
loads and buckling forms. Experimental investigations were performed using a universal testing machine with an
optical deformation measurement system. In parallel with the experimental tests, numerical simulations were made
using the Finite Element Method (FEM). The numerical studies conducted using dedicated numerical models and
the experimental studies made it possible to carry out a thorough analysis of the impact of the cross-sectional shape
on the buckling phenomenon of the structure. The novelty of the present paper is the use of interdisciplinary testing
methods to compare the effect of cross-sectional geometry on the stability of thin-walled composite columns.
