Abstract
The more demanding requirements for the reduction of vibration in passenger railways and urban railway lines have led to a trend towards lower-stiffness rail fastening systems accompanied by greater deformation of their rubber components. Nonlinearities under large deformation due to the boundary conditions, geometric properties, intrinsic hyperelasticity and viscidity of the rubber material, and dynamic nonlinear features such as the Payne effect have become prominent and cannot be ignored. In this research, a shear-type fastening system and a bonded compression-type rail fastening system have been designed and produced using the same rubber material. A set of mechanical experiments of the used rubber material was first performed to obtain the rubber properties; this information was later used as an input to a three-dimensional finite element model constructed using Abaqus. Laboratory tests of the two fastening specimens were then performed to obtain the quasi-static and dynamic displacement–force curves. Later, the three-dimensional finite element models were presented, and the calculated curves were compared to the measured values. Finally, the two fastening systems were comparatively analyzed, and the influences of their various nonlinear properties were discussed. The combined experimental and numerical analyses of the nonlinear properties of the two typical types of rail fastening systems are believed to enhance the understanding of their mechanical behavior and to improve the product design, structural optimization, and testing in practice.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call