Technical Reports

Nondestructive Measurement of Longitudinal Rail Stresses (Interim Report)

A study of the effect of applied stress on the wave velocity (acoustoelasticity) of railroad rail steel has shown that a potentially useful technique exists for the nondestructive measurement of longitudinal stresses. The detection of extreme stress levels would contribute toward increased rail...

Influence of Vehicle Induced Loads on the Lateral Stability of CWR Track

Thermal buckling of railroad tracks in the lateral plane is an important problem in the design and maintenance of continuous welded rail track (CWR). The severity of the problem is manifested through the increasing number of derailments which are attributable to track buckling, indicating a need...

Ballast and Subgrade Requirements Study: Railroad Track Substructure – Design and Performance Evaluation Practices

Earth Materials- i.e., soil and rock- form the substructure (ballast, subballast, and subgrade) of all railroad track. In this report, the most suitable technology and design criteria as related to design of the substructure are identified based on a review of current track substructure design...

Ballast and Subgrade Requirements Study: Railroad Track Substructure – Materials Evaluation and Stabilization Practices

Earth materials--i.e., soil and rock--form the substructure of all railroad track. In this report, the functions and performance characteristics of each of the substructure elements (i.e., ballast, subballast, and subgrade), and the material properties that influence the substructure performance...

Analysis of Thermal Buckling Tests on U.S. Railroads

Thermal buckling of railroad tracks in the lateral plane is an important problem in the design and maintenance of continuous welded rails (CWR). The severity of the problem is manifested through the increasing number of derailments which are attributable to track buckling, indicating a need for...

Special Routing of Spent Fuel Shipment Study

Special rail routing of spent fuel shipments from commercial nuclear power plants away-From-Reactor (AFR) storage and disposal sites has been proposed as one means of reducing the consequences and severity of radioactive materials accidents in areas of high population density. Whether or not...

Engineering Data Characterizing the Fleet of U.S.Railway Rolling Stock Volume I: User Guide

This report contains engineering parameter descriptions of major and distinctive freight vehicle configurations covering approximately 96% of the U.S. freight vehicle fleet. This data has been developed primarily for use in analytical simulation modeling of rail vehicles to analyses of vehicle/...

A Metallurgical Evaluation of two AAR M128 Steel Tank Car Head Plates Used in Switchyard Impact Tests

The National Bureau of Standards correlated the mechanical properties and metallurgical characteristics of two steel head plate samples taken from tank cars subjected to switchyard impact tests. This metallurgical evaluation included determining whether the samples conformed with the appropriate...

A Metallurgical Analysis of an ASTM A 212-B Steel Tank Car Head Plate

The sample was taken from the A-head plate of tank car SOEX 3033 involved in an accident near Winder, Georgia. The A-head plate was reportedly produced to specification ASTM A212-65, Grade B steel. The results of laboratory check chemical analyses indicated that the plate sample met the chemical...

Improving Railroad Technology : A Directory of Research and Development Projects of the Federal Railroad Administration

The FRA's Research and Development program has as its goals near-term improvements in products and processes which would enhance safety, improvements in the economic viability and efficiency of the Nation's railroad operations, and reduction of adverse environmental effects of railroad...

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Technical Reports