Radial Compression Behaviors of Filament Wound Risers with Different Winding Angles and CNTs Contents

Compressive behavior is an important aspect of the performance of composite cylindrical/shell/tube structures, and its strength under compression is influenced by various factors, including material parameters, forming parameters, and design parameters. This paper focuses on the effects of the content of carbon nanotubes (CNTs) and winding angle on the compressive behavior of composite risers with metallic liners. First, a full-factorial experiment incorporating winding angles and CNT content was designed, and composite risers were manufactured using the same filament winding process. Second, the variations in compressive force of the composite risers and the failure modes of the risers under radial compression were discussed. Finally, the sensitivity of structural compressive indicators was assessed using a mean method, and the parametric effect was also analyzed. The results show that the metal liner dominates the compressive resistance of composite risers in the linear elastic stage, and larger winding angles cause greater load fluctuations. In comparison to the CNTs content, the winding angle exerts a more substantial influence on the overall compressive performance.