The influence of mechanical coupling on the buckling behaviour of cfrp column profiles
Referat wygłoszony
| Status: | |
| Autorzy: | Falkowicz Katarzyna, York Christopher B. |
| Rok wydania: | 2025 |
| URL do źródła | LINK |
| Język: | angielski |
| Źródło: | X International Conference of Computational Methods in Engineering Science – CMES’25 |
| Miasto wystąpienia: | Cedzyna |
| Państwo wystąpienia: | POLSKA |
| Efekt badań statutowych | NIE |
| Abstrakty: | angielski |
| The study focuses on the analysis of three recently identified classes of mechanically coupled laminates exhibiting matching Extension–Twisting (B₁₆/B₂₆) couplings. The considered stacking sequence configurations fulfill the Hygro-Thermally Curvature Stable (HTCS) condition, ensuring immunity to thermal warping deformations resulting from the high-temperature curing process. The investigation was performed on thin-walled carbon fibre reinforced plastic (CFRP) profiles subjected to axial compression, with the aim of quantifying how selected types of mechanical coupling influence both the buckling and postbuckling response. The research methodology included algorithm development for synthesis of laminates with precisely matched orthotropic ABD stiffness properties in order to quantify the effects of adding specific mechanical coupling properties through stacking sequence tailoring. The baseline design represents a fully isotropic material onto which Extension- Twisting coupling is then added. Further mechanical couplings are then introduced to assess the influence of Extension-Shearing and/or Bending-Twisting. Analytical and Numerical (finite element) analyses were conducted to assess the influence of the coupling terms on the critical buckling load and mode shape interaction. Experimental validation tests were performed on selected profile sections using a universal testing machine with bespoke support fixtures. The results demonstrate that the presence of Extension–Twisting coupling modifies the stability characteristics of composite profiles, leading to interesting changes in the critical load and buckling mode development. The findings highlight the potential of controlled mechanical couplings in the design of advanced, tailored-stiffness composite thin walled structures |
