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12
Feb
2024
Research Results
Expansion of Rail Flaw Library at the Transportation Technology Center
Subject
Track
Keywords: Rail, rail wear, rail defect, rail flaw library, ultrasonic testing, UT, phased array ultrasonic testing, PAUT, Miniprof, Rail Flaw Library of Associated Defects, RF-LOAD, non-destructive evaluation, NDE, track
Report Number
RR 22-36
Office
RDI-21
9
Feb
2024
Technical Reports
Mechanistic Investigation of Timber Crosstie Spike Fastener Failures – Phase I: The Magnitude of the Spike Failure Challenge
Subject
Track
Keywords: track research, cut spikes, drive spikes, screw spikes, elastic fastening systems, failure analysis, broken spikes
Abstract: The Rail Transportation and Engineering Center (RailTEC) at the University of Illinois at Urbana-Champaign (UIUC) performed a literature review, conducted an industry-wide...
Report Number
DOT/FRA/ORD-24-06
Office
RDI-21
13
Sep
2023
Technical Reports
High-Strength, Reduced-Modulus, High-Performance Concrete for Prestressed Concrete Crosstie Applications
Subject
Track
Keywords: Concrete, crosstie, weathered aggregate, granite, modulus
Abstract: High-performance concrete (HPC) with early strength development is the material of choice for fabricating prestressed concrete railroad ties. However, the higher strength of...
Report Number
: DOT/FRA/ORD-23/26
Office
RPD-21
7
Sep
2023
Technical Reports
Characterization of Track Geometry for Various Operational Conditions
Subject
Track
Keywords: Track geometry, track quality, track irregularities, space curve, Automated Track Inspection Program, ATIP, Power Spectral Density, PSD, clustering
Abstract: This report characterizes the amplitude and wavelength content of the current track geometry environment of the United States railroad system and examines the combination of...
Report Number
DOT/FRA/ORD-23/25
Office
RDI-22
21
Aug
2023
Technical Reports
Autonomous Inspection System Based on Passive Sensing and Anomaly Detection
Subject
Track
Keywords: Ballast moisture monitoring, fouled ballast monitoring, passive sensing system, frequency doubling reflectenna, sequential change detection, deep neural networks, machine learning, artificial intelligence, high-frequency electrical simulation models
Abstract: Detecting poor track conditions before they become safety-critical is essential for improving the safety and efficiency of railroads. To this end, autonomous track inspection...
Report Number
DOT/FRA/ORD-23/23
Office
RDI-21