کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
783702 | 1465005 | 2013 | 13 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Sub-modelling for the ratchetting failure of insulated rail joints Sub-modelling for the ratchetting failure of insulated rail joints](/preview/png/783702.png)
Insulated rail joints are critical for train safety as they control electrical signalling systems; unfortunately they exhibit excessive ratchetting of the railhead near the endpost insulators. This paper reports a three-dimensional global model of these joints under wheel–rail contact pressure loading and a sub-model examining the ratchetting failures of the railhead. The sub-model employs a non-linear isotropic–kinematic elastic–plastic material model and predicts stress/strain levels in the localised railhead zone adjacent to the endpost which is placed in the air gap between the two rail ends at the insulated rail joint. The equivalent plastic strain plot is utilised to capture the progressive railhead damage adequately. Associated field and laboratory testing results of damage to the railhead material suggest that the simulation results are reasonable.
Journal: International Journal of Mechanical Sciences - Volume 75, October 2013, Pages 110–122