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The research aimed to investigate the stability of thin-walled composite columns with a Z-shaped cross-section, subjected to axial compression under varying temperature conditions. The test specimens were fabricated using a carbon-epoxy composite with asymmetric ply arrangements. These specific configurations were chosen due to their resistance to thermal distortions, a result of the high-temperature curing process (HTCS laminates). The experimental setup included a universal testing machine for applying axial loads, a thermal chamber to control temperature conditions, and the ARAMIS optical system for 3D deformation measurements. The key outcome of the study was the identification of the effects of both temperature variations and the arrangement of unsymmetric composite layers with mechanical couplings on the structural stability of the columns. A significant contribution of the research was the integration of advanced experimental techniques to assess the critical buckling state of thin-walled composite structures with Z-shaped cross-sections. The study highlighted the influence of thermo-mechanical properties on both the stability and load-bearing capacity of these structures, offering insights for their application in high-temperature environments. The novelty lies in the interdisciplinary approach, combining material science and structural engineering to address stability challenges in composite structures.
