Screw lateral restraint behaviour of timber and polymeric based railway sleepers

Yu, Peng and Manalo, Allan ORCID: https://orcid.org/0000-0003-0493-433X and Ferdous, Wahid ORCID: https://orcid.org/0000-0002-4473-4722 and Salih, Choman ORCID: https://orcid.org/0000-0002-8705-8779 and Heyer, Tom and Schubel, Peter ORCID: https://orcid.org/0000-0003-1610-0922 (2022) Screw lateral restraint behaviour of timber and polymeric based railway sleepers. Engineering Failure Analysis, 139:106514. pp. 1-18. ISSN 1350-6307


Abstract

Broken spikes/screws were reported to fail in bending at the sleeper hole due to repeated lateral force and have become a major challenge for hardwood timber sleepers. The emergence of polymeric based composite railway sleepers further highlighted this problem as they are perceived to have limited screw lateral restraint. It is thus significant to evaluate the lateral restraint behaviour of timber and the timber replacement composite sleepers. This study investigated the lateral strength of timber, synthetic composite and Ultra High Molecular Weight Polyethylene plastic sleepers at the standard required displacement of 5.1 mm as suggested by the American Railway Engineering and Maintenance-of-way Association and up to failure. The results showed screw yielding and sleeper material hardening even before 5.1 mm displacement while timber and synthetic composites exhibited ultimate lateral strength almost half of plastics’ performance due to the relatively weak shear capacity in the fibre direction. The grain/fibre shear-out failure was noticed in the orthotropic sleeper materials (timber and synthetic composites) while the isotropic material (plastic) mainly exhibited bearing failure. Based on the isotropic hardening rule and Hill's criterion, the developed finite element models predicted very well the screw lateral deformation and strength of timber and composite sleepers.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 27 Jul 2022 23:09
Last Modified: 04 Oct 2022 03:06
Uncontrolled Keywords: 3D finite element analysis; Plastic railway sleepers; Screw lateral failure analysis; Stress distribution; Synthetic composites
Fields of Research (2020): 40 ENGINEERING > 4017 Mechanical engineering > 401706 Numerical modelling and mechanical characterisation
40 ENGINEERING > 4016 Materials engineering > 401609 Polymers and plastics
40 ENGINEERING > 4005 Civil engineering > 400505 Construction materials
Socio-Economic Objectives (2020): 12 CONSTRUCTION > 1203 Construction materials performance and processes > 120304 Polymeric materials and paints
12 CONSTRUCTION > 1203 Construction materials performance and processes > 120399 Construction materials performance and processes not elsewhere classified
12 CONSTRUCTION > 1203 Construction materials performance and processes > 120306 Timber materials
Funding Details:
Identification Number or DOI: https://doi.org/10.1016/j.engfailanal.2022.106514
URI: http://eprints.usq.edu.au/id/eprint/50277

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