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Thermal Measurements of Commuter Rail Wheels Under Revenue Service Conditions

The report documents the test objective, procedure, and equipment used during the execution of the New Jersey Transit Operational Field Test conducted under the FRA Cracked Wheel Investigation. The report also includes a presentation of all data gathered during the test procedure and illustrates...

Thermomechanical Testing and Microstructural Development of Class L Steel Wheel Alloy

Macrostructure, microstructure, and quantitative metallographic analysis is conducted on Association of American Railroads Class L wheel steel specimens tested in a Gleeble 1500 under combined mechanical compression and resistance heating to temperatures above and below the austenite transformation...

Results and Analysis of the Switchyard Impact Tests

This report presents the results and analysis of series 3 through 7 and series 10 of the FRA/RPI/AAR Switchyard Impact Tests. The test results and analysis are used to evaluate the head shield and the shelf-E coupler as protective devices for hazardous materials tank cars.

Preliminary Analysis of the Effects of Non-Linear Creep and Flange Contact Forces on Truck Performance in Curves

Prediction of wheel displacements and wheel-rail forces is a prerequisite to the evaluation of the curving performance of rail vehicles. This information provides part of the basis for the rational design of wheels and suspension components, for establishing criteria for maintenance of track and...

Railroad Wheel Residual Stress Detection Program- An Evaluation of Residual Stress in Cast Steel Railroad Wheels using Electromagnetic Acoustic Transducers (EMATS)

A nondestructive testing (NDT) method to determine the residual stress in the rims of cast steel railroad wheels has been evaluated by the Association of American Railroads (AAR). The National Institute of Standards and Technology (NIST) has developed an ultrasonic system which uses electromagnetic...

Passenger Rail vehicle Safety Assessment Methodology Volume II: Detailed Analyses and Simulation Results

This report presents detailed analytic tools and results on dynamic response which are used to develop the safe dynamic performance limits of commuter passenger vehicles. The methodology consists of determining the critical parameters and characteristic properties of both the vehicle and the track...

Passenger Rail Vehicle Safety Assessment Methodology Volume I: Summary of Safe Performance Limits

This report presents a methodology based on computer simulation that assesses the safe dynamic performance limits of commuter passenger vehicles. The methodologyt consists of determining the critical design parameters and characteristic properties of both the vehicle and the track, establishing the...

Single Passenger Rail Car Impact Test Volume III: Test Procedures, Instrumentation and Data

A full-scale impact test was performed November 16, 1999 at the Federal Railroad Administration's Transportation Technology Center, Pueblo, Colorado. The test was performed on a Budd Company Pioneer-type commuter passenger car. The purpose of the test was to measure strains, accelerations and...

Fracture Resistance and Fatigue Crack Growth Characteristics of Railroad Wheels and Axles

The effects of chemical composition, temperature and loading rates on the plane strain fracture toughness K sub I sub c of railroad wheels have been determined. Similarly, the effects of these variables were determined for grade U and F railroads axles. The carbon content was determined to be the...

Evaluation of a Prototype Acoustic Signature Inspection System for Railroad Wheels

A description is given of considerations in the design of a prototype acoustic signature inspection system for railroad wheels. The evolution of each of the components of the system is detailed including hammers, microphones, wheel sensors, wayside electronics and signal conditioning unit. The...

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