Integrating Viscoelastic Auxetic Materials into Fastening Systems for Enhanced Track Performance

Auxetic structures, characterized by their negative Poisson’s ratio (NPR), exhibit unique deformation properties, such as lateral expansion when stretched, which make them highly effective for applications requiring enhanced energy absorption and vibration suppression. When integrated with viscoelastic materials, known for their ability to dissipate energy through both elastic and viscous mechanisms, these structures have the potential to significantly improve the performance of railway fastening systems. The combination of auxetic structures with viscoelastic materials has not been extensively explored in railway engineering, particularly in the context of vibration control and dynamic load mitigation. This study seeks to fill this gap by investigating the integration of viscoelastic auxetic materials into railway fastening systems, aiming to enhance vibration damping and improve track performance. The research focuses on the dynamic behavior of these materials under typical train-induced load conditions, with the objective of assessing their effectiveness in reducing vibrations and improving the track performance. Using advanced numerical simulations and experimental testing, the performance of viscoelastic auxetic fastening systems (VAFS) is compared to conventional fastening systems (CFS). The results indicate that viscoelastic auxetic systems offer superior vibration attenuation, effectively reducing the amplitude of vibrations transmitted to surrounding structures. Furthermore, the unique deformation characteristics of the auxetic materials contribute to better energy absorption, enhancing the overall performance of the fastening systems. The findings highlight the potential of these materials to provide an effective solution for vibration control in modern railway systems, particularly for urban and subway systems.

کلیدواژه ها:

Viscoelastic materials ، Auxetic structures ، Fastening systems ، Railway track