Teixeira et al 2026 Hybrid composite tubes under torsion natural versus AcadMatSci8251

Although composite materials have been studied and validated through various tests, research on torsional behavior in tubular structures remains limited. The main objective of this work is to compare the torsional behavior of laminated composite and hybrid tubes incorporating both aluminum and composites. In this study, prepregs were manufactured using hand lay-up techniques and subjected to various treatments including fiber pretreatment with sodium hydroxide to enhance adhesion to the matrix. Specimens were fabricated with configurations such as sisal and glass fibers, followed by thermal analysis and torsional tests. The results indicate that the glass:aramid [0◦]/epoxy laminate exhibited higher thermal stability compared to the sisal2 [0◦]/epoxy laminate, with specific temperatures recorded during the curing process. Moreover, under torsional loading, the sisal2 [0◦]/epoxy/Al specimen achieved a higher torque performance than its glass:aramid counterpart. These findings suggest that hybrid composites can offer superior properties for applications requiring both strength and lightweight characteristics.