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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 subjects of the study were thin-walled composite columns with closed cross sections manufactured using the
autoclave technique. The composite profiles were characterized by the fact that they had a constant height and
arrangement of laminate layers, however, varied cross-sectional shapes. The study was conducted using several
interdisciplinary experimental research methods and advanced numerical simulations. In the course of the
research, both forms of structural stability loss were registered, and damage to composite structures was
assessed. In the course of the research, the influence of the shape of the cross-section on the stability and load-
carrying capacity of the structure was evaluated. A measurable effect of the conducted research was the
determination of the structure’s post-buckling equilibrium paths, which made it possible to determine the
structure’s behavior in the full range of loading. In addition, the author’s numerical models developed enabled
validation of parallel experimental studies. The developed numerical models were based on a failure criterion
known as progressive failure analysis - which allowed a thorough assessment of the failure mechanism of the
composite material.
