FULL SCALE TEST ON A RAILROAD SECTION UNDER REALISTIC STRAIN-TIME-HISTORY Department of Design and Industrial Management - University of Naples Federico II

Format:

Conference/Event

Author/Creator:

De Iorio, A., author.

Conference Name:

Automotive and Transportation Technology Congress and Exposition (2001-10-01 : Barcelona, Spain)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

The design optimisation of a track structure requires the knowing of the realistic service loads, obtainable by means of "on-track tests". The track design is obviously based on the static and dynamic load distribution applied to the rails, but also depends on the distribution of these loads through the rails and then to a number of sleepers. Moreover, there are effects of the rail stiffness and trackbed modulus influencing the forces which should be applied in a laboratory test. The knowedge is of great importance when, for example, one has to deal with the testing of new rail fastening assemblies. However in-service tests show two big drawbacks. The first is involved with the stopping of the traffic on line which must be planned and managed within a short time; the second is related to the impossibility of leading the system parameters close to their critical values to point out the mechanical strength of the adopted structural components. To overcome these problems, even if in a partial way, a full scale testing machine has been designed and buit at the Department of Design and Industrial Management of the University of Naples. The aim is to reproduce real strain-time history recorded during "on-track tests" and the relative movement of the rail to the sleepers. Also a numerical model has been set up for a better understanding of the stress-strain history and subsequently forecasts the critical conditions in the fastening systems. The present work has been developed within a research project whose goals are:

Notes:

Vendor supplied data

Publisher Number:

2001-01-3301

Access Restriction:

Restricted for use by site license