Numerical investigation of the fatigue performance of elastic rail clips considering rail corrugation and dynamic axle load

• DOI: 10.1177/0954409720926016
• Publication Date: 2020-05-19T08:54:11Z
• Authors: Ping Wang; Jun Lu; Caiyou Zhao; Mingming Chen; Mengting Xing
• Keywords: Fastener

To analyze the reasons for rail clip fracture, characteristics of corrugation were first measured using a meter. The vibration acceleration fastener clips at sections with/without was measured, and effects on analyzed. After this, vehicle--track coupling dynamic model refined system established in order to study stress critical points. Finally, grinding limits determined based fatigue analysis method damage accumulation theory from aspect life clip. results showed that main wavelength fracture section approximately 40 mm. caused by too large. Under normal installation conditions, maximum 1490 MPa small circular arc rear arch, which identical on-site location. intrinsic frequency 810 Hz. Rail excited triggered forced clip, induced resonance speed 120 km/h large cyclic amplitude with increased 44 68 when compared without corrugation. naturally occurring arising For metro lines designed km/h, it suggested control amplitudes mm, 50 30 mm 160 below 0.04, 0.08, 0.16, 0.19 0.2 respectively, taking into account