General

Nippon Sharyo Ribbon Cutting

On behalf of President Obama and Secretary Foxx, it is an honor to be back in my home state with Governor Quinn and all invited dignitaries.

Report No. 23 Residual Stress Detection in Railroad wheels: An Ultrasonic System Using EMATS

This is report number 23 in a series coverign research performed by the National Institute of Standards and Technology for the Federal Railroad Administration. This report covers a project by the Materials Reliability Division (formerly the Fracture and Deformation Division) to develop and build a...

Investigation of the Effects of Tie Pad Stiffness on the Impact Loading of Concrete Ties in the Northeast Corridor

This investigation was conducated in response to the discovery in June 1980, that rail seat bending cracks had developed in many concrete ties which had been in service on the Amtrak Northeast Corridor track for periods of a few months. The study was initiated by the Federal Railroad Administration...

FRA/Volpe Center Task Force Observation of Operations at TVE Transrapid Test Facility, Addendum

This report is an addendum to a report (No. DOT-VNTSC-RR393-PM-93-1) prepared in April 1993 describing the operatoins witnessed and the relevant information obtained by nine members of the FRA/Volpe Center High Speed Guided Ground Transportation Safety Task Force during 9 weeks of observation of...

FRA/Volpe Center Task Force Observation of Operations at TVE Transrapid Test Facility

Maglev technology is currently being considered for several passenger ground transportation corridors in the United States. A franchise has been awarded by the Florida High Speed Rail Commission to Maglev Transit, Inc. (MTI), to build a demonstration project in Florida. A maglev system, linking a...

Experimental Study of Residual Stresses in Rail by Moire Interferometry

The residual stresses in rails produced by rolling cycles are studied experimentally by moire interferometry. The dissection technique is adopted for this investigation. The basic principle of the dissection technique is that the residual stress is released elastically by creating free boundaries...

Gage Restraint Measurement System Comparison Tests: Railbound and Hi-Rail Vehicles

Compartive tests were conducted to evaluate the gage restraint measurements system (GRMS) testing capabilities of a railbound GRMS vehicle, Federal Railroad Administraion's (FRA's) T-6, and a hi-rail vehicle, Holland Company's TrackStar GRMS system. The test objectives were to compare the...

Experimental Investigations of Dynamic Buckling of CWR Tracks

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

Determination of Residual Stresses in Rails

A destructive sectioning technique for measuring the complete three-dimensional residual stresses in a rail cross section was developed. The technique was applied to four tangent rail specimens: two 136-pound specimens were taken from FAST (Facility for Accelerated Service Testing), Pueblo,...

Computational Methods to Predict Railcar Response to Track Cross-Level Variations

The rocking response of railroad freight cars to track cross-level variations is studied using: (1) a reduced complexity digital simulation model, and (2) a quasi-linear describing function analysis. The reduced complexity digital simulation model employs a rail truck model that neglects the high-...

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