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http://dx.doi.org/10.17703/JCCT.2021.7.2.405

Analytical Study on Fatigue Behavior of Resilient Pad for Rail Fastening System  

Choi, Jung-Youl (Dept. of construction engineering, Dongyang University)
Publication Information
The Journal of the Convergence on Culture Technology / v.7, no.2, 2021 , pp. 405-410 More about this Journal
Abstract
In this study, a finite element analysis was performed applying a nonlinear material model and fatigue load conditions to evaluate the service life and spring stiffness of the resilient pad for rail fastening system. As a result of the fatigue analysis, the rate of change in spring stiffness compared to the initial condition was about 16%, indicating that fatigue hardening occurred. As for the stress generated in the longitudinal direction of the resilient pad, the difference between the stress generated at the center and the edge was about 10 times or more. In addition, it was analyzed that the equivalent stress of the outer boundary was more than twice as large as that of the central part. Therefore, it was analyzed that the damage and deformation of the resilient pad are the corners of the resilient pad under actual service conditions. The fatigue life diagram of the resilient pad (S-N curve) was derived using the equivalent stress of the resilient pad according to the fatigue cycles. Using the fatigue life diagram of the resilient pad derived in this study, it is considered that it can be used to predict the fatigue life under the relevant conditions by calculating the equivalent stress of the resilient pad under various load conditions.
Keywords
Spring stiffness; Equivalent stress; Resilient pad; fatigue; S-N curve; Finite element analysis;
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