In a groundbreaking study published in the *International Journal of Lightweight Materials and Manufacture*, researchers have explored the dynamic behavior of a thick composite beam reinforced with carbon nanorods (CNRs) derived from recycled potato peels. The study, led by Fatemeh Bargozini from the Department of Solid Mechanics at the University of Kashan in Iran, delves into the spinning and whirling vibrations of a composite beam made of glass fibers, epoxy resin, and CNRs. The findings could have significant implications for maritime and other industries that rely on lightweight, high-performance materials.
The research team synthesized CNRs using a hydrothermal method from recycled potato peels, offering an eco-friendly and cost-effective alternative to traditional nanotubes. By incorporating just 0.32% CNRs into the composite beam, the natural frequency increased by an impressive 46.6%, as demonstrated through experimental and numerical analyses. This enhancement in performance is attributed to the increased stiffness of the composite beam, which is directly linked to the Young’s modulus of the materials involved.
Bargozini and her team utilized the sinusoidal shear deformation beam theory and the neutral axis to formulate their equations, solving them using the Ritz method. Their study examined various parameters, including rotational speeds, axial force, Young’s modulus, aspect ratio, temperature changes, volume fraction of CNR, and thickness. The results were visualized through Campbell diagrams, which plot the natural frequencies against rotational speeds.
One of the key findings is that higher temperatures lead to a decrease in natural frequency, while increasing the Young’s modulus boosts the natural frequency. The volume fraction of CNR also plays a crucial role, with higher fractions leading to increased damped and undamped natural frequencies. Interestingly, the angular velocity along the y-axis has a more significant impact compared to other axes, and the traction force enhances the natural frequency of the rotating structure.
“The findings indicate that CNR is an economical and eco-friendly substitute for nanotubes,” Bargozini stated. This discovery opens up new avenues for applications in aviation, terrestrial, and maritime transportation, as well as in rotating turbines, structures, and rotary drilling machinery.
For the maritime sector, the implications are particularly exciting. The use of lightweight, high-strength materials can lead to more fuel-efficient vessels, reduced emissions, and improved performance. The study’s findings could pave the way for the development of advanced composite materials that are not only stronger and more durable but also more sustainable. As the industry continues to seek innovative solutions to meet environmental regulations and operational demands, the use of CNRs derived from recycled materials could be a game-changer.
In summary, the research conducted by Bargozini and her team highlights the potential of CNRs as a viable and sustainable alternative to traditional nanotubes. The study’s findings, published in the *International Journal of Lightweight Materials and Manufacture*, offer valuable insights into the dynamic behavior of composite beams and their applications in various industries, including maritime. As the world moves towards more sustainable and efficient solutions, the use of eco-friendly materials like CNRs could play a pivotal role in shaping the future of transportation and manufacturing.