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Wang, Z. (author), Almeida, José Humberto S. (author), Ashok, Aravind (author), Wang, Zhonglai (author), Castro, Saullo G.P. (author)Variable-angle filament-wound (VAFW) cylinders are herein optimized for minimum mass under manufacturing constraints, and for various design loads. A design parameterization based on a second-order polynomial variation of the tow winding angle along the axial direction of the cylinders is utilized to explore the nonlinear steering-thickness...journal article 2022
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Castro, Saullo G.P. (author), Almeida Jr., J.H.S. (author), St-Pierre, Luc (author), Wang, Z. (author)Measuring the geometric imperfections in cylindrical shells is a critical step necessary to create accurate numerical models that can capture the imperfection-sensitive behavior of these structures. Modern composite structures, such as variable–angle filament–wound (VAFW) cylinders, have a unique imperfection signature that is still unknown to...journal article 2021
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Design, modeling, optimization, manufacturing and testing of variable-angle filament-wound cylindersAlmeida, José Humberto S. (author), St-Pierre, Luc (author), Wang, Z. (author), Ribeiro, Marcelo L. (author), Tita, Volnei (author), Amico, Sandro C. (author), Castro, Saullo G.P. (author)This work demonstrates the potential of manufacturing variable-angle composite cylinders via filament winding (FW), called VAFW. The proposed design strategy allows different filament angles along the axial direction by dividing the cylinder into regions of constant angle called frames. Designs using two, four, or eight frames are herein...journal article 2021