Dynamic behavior and vibration analysis of pre-stressed composite-metal hybrid cylinder under high-speed rotation

Pre-stressed composite-metal hybrid cylinders (PS-CMHCs) have gained widespread use in high-speed rotating devices within the nuclear field due to their superior properties compared to monolithic metals and fiber-reinforced composites. The design and fabrication of PS-CMHCs require a comprehensive understanding of the interplay among various design parameters. This study focuses on investigating the dynamic behavior and vibration characteristics of rotational PS-CMHCs, specifically considering the filament winding (FW) process. To validate the finite element (FE) modeling method, an analytical modeling approach is employed. The dynamic characteristics, including stress evolution, material nonlinearity, vibrations, and buckling, are analyzed. Numerical results indicate that stress relaxation effects resulting from FW remain consistent regardless of winding stress, allowing for the determination of optimal thickness. The significance of composites in load-bearing capacity is emphasized. Vibration and buckling analyses reveal that the composite layers have a less significant effect on stiffness compared to buckling strength. While, the winding angle has slight effects on both. Additionally, increasing winding stress reduces both vibrations and buckling strength. These findings provide valuable insights for safety design and application of PS-CMHCs.