General

Safety Evaluation of TSM Prototype Electronically Controlled Pneumatic Train Brake System on Brake Rack

Performance standards for Electronically Controlled Pneumatic (ECP) freight brake systems for use on the North American railroads are being developed by working groups composed of personnel from the railroad industry, the railroad supply industry, and AAR technical staff. Draft specifications (S-...

Experimental 3-D Residual Stress Measurement in Rails via Thermal Annealing

This report describes a novel method to determine three-dimensional (3-D) residual stresses in railroad rails. The method uses Moire and Twyman/Green interferometry to measure the deformation of rail slices during a stress relief process which is accomplished by thermal annealing (heat treatment...

Fire Safety of Passenger Trains Phase I: Material Evaluation (Cone Calorimeter)

As part of the passenger equipment rulemaking required by Congress, the Federal Railroad Administration (FRA) has proposed that its existing fire safety guidelines be made mandatory. A major conclusion of a FRA-funded 1993 study by the National Institute of Standards and Technology (NIST) was...

Rail Vehicle Crashworthiness Symposium

This document contains the proceedings of the Rail Vehicle Crashworthiness Symposium held at the Volpe Center in Cambridge, Massachusetts on June 24, 25, and 26, 1996. These proceedings have been developed from a transcript of the symposium and the material used by the presenters at the...

Analyses of Rail Chill Effect

The principles of heat transfer are applied to analyze the so-called “rail chill” effect, which refers to heat loss by conduction from a hot rail vehicle wheel through the contact area into a cold rail, the wheel having been heated by friction braking. A difference of more than a factor of two is...

Experimental Determination of Release Fields in Cut Railroad Car Wheels

A new approach to the measurement of residual stresses in railroad wheels is investigated using a saw cut method of releasing stresses in the structure. High-sensitivity moire interferometry combined with Michelson interferometry provides full-field information about the distribution of...

Influence of Contact Patch Resistance on Loss of Shunt at Highway-Railroad Grade Crossing: Appendix D

Influence of Contact Patch Resistance on Loss of Shunt at Highway-Railroad Grade Crossing: APPENDIX A

Influence of Contact Patch Resistance on Loss of Shunt at Highway-Railroad Grade Crossing

Results of testing completed to date have revealed no promising mitigation techniques to reduce or eliminate loss of shunt on highway/rail grade crossing island circuits. During the course of this test program, results have shown that resistive films that develop on the running surfaces of wheels...

Investigation on CWR Longitudinal Restraint Behavior in Winter Rail Break and Summer Destressing Operations

This report presents the results of investigations on the rail anchor/fastener effects on rail movement and the resulting rail force distribution in continuous welded rail (CWR)track during rail breaks and destressing operations. Two types of tests are used, one for simulating winter rail break...

« First
‹‹
…
441
442
443
444
445
446
447
448
449
…
››
Last »

USA Banner

General