Change search
ReferencesLink to record
Permanent link

Direct link
Assessment of methods for calculating contact pressure in wheel-rail/switch contact
University of Leoben.
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
University of Leoben.
Chalmers University of technology. (Charmec)
Show others and affiliations
2008 (English)In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 265, no 9, 1439-1445 p.Article in journal (Refereed) Published
Abstract [en]

 Two models for wheel-rail rolling contact that are based on the half-space assumption are compared in this paper: Hertz and the non-Hertzian method implemented in the computer program CONTACT. These two models are further restricted by the assumption of linear-elastic material behaviour. Moreover, one elastic and one elastic-plastic finite element model of the contact are investigated with the commercial code ABAQUS. The finite element method is not limited by the half-space assumption or applicable to a linear-elastic material model only. The objective is to assess the four methods based on calculated contact pressure, contact patch size and penetration depth. Contact loads and contact locations, used as input data in the analysis, are taken from a vehicle dynamics simulation in the software GENSYS. The comparison is performed at a given cross-section in the crossing panel of a selected turnout design. To fulfil the requirements of the half-space assumption, the dimensions of the contact area must be small compared to the radii of curvature of the bodies in contact. On the selected cross-section, however, the half-space assumption does not hold since the smallest radius of rail curvature at the contact point is 13 mm, which is comparable to the largest semi-axis of the contact area. Nevertheless, it is found that the contact pressure distributions calculated using Hertz and CONTACT correlate well with those results obtained from the finite element method as long as no plastification of the material occurs.

Place, publisher, year, edition, pages
Elsevier, 2008. Vol. 265, no 9, 1439-1445 p.
Keyword [en]
wheel-rail contact; crossing; contact pressure and contact forces; finite element modelling; multibody dynamics
National Category
Infrastructure Engineering
Research subject
Järnvägsgruppen - Infrastruktur
URN: urn:nbn:se:kth:diva-76131DOI: 10.1016/j.wear.2008.02.039ISI: 000258891700037OAI: diva2:490864
QC 20120208Available from: 2012-02-08 Created: 2012-02-06 Last updated: 2012-02-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textSciencedirect

Search in DiVA

By author/editor
Gebretsadik, Elias Kassa
By organisation
Highway and Railway Engineering
In the same journal
Infrastructure Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 85 hits
ReferencesLink to record
Permanent link

Direct link