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Sub-modelling for the ratchetting failure of insulated rail joints

journal contribution
posted on 06.12.2017, 00:00 by Nirmal MandalNirmal Mandal, Manicka DhanasekarManicka Dhanasekar
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 nonlinear 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.

History

Volume

75

Start Page

110

End Page

122

Number of Pages

13

ISSN

0020-7403

Location

United Kingdom

Publisher

Pergamon

Language

en-aus

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Centre for Railway Engineering; Queensland University of Technology; TBA Research Institute;

Era Eligible

Yes

Journal

International journal of mechanical sciences.