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1
Mar
1980
Technical Reports
Track Rehabilitation Research and Development
Subject
Track,
Evaluation
Keywords: Research Requirements, Track, Rail, Ties, Fasteners, Ballast, Track Program
Abstract: The Federal Railroad Administration has established a Track Rehabilitation Research and Development program to better meet its obligations under the Railroad Revitalization and...
Report Number
FRA/OR&D-80/10
Office
RRD
1
Feb
1980
Technical Reports
Sleeve Expansion of Bolt Holes in Railroad Rail Volume I - Description and Planning
Keywords: Cold expansion; crack; fatigue; madrel; rail bolt hole
Abstract: The most predominant failure mode of rails with bolt joints 1s a web crack initiating at the rail bolt hole. This failure mode is of a classical fatigue nature induced by web...
Report Number
DOT/FRA/ORD-80/05.I
Office
RDI-20
1
Feb
1980
Technical Reports
Sleeve Expansion of Bolt Holes in Railroad Rail Volume Ill - Field Experiment ResuIts
Keywords: Cold expansion; Crack; Fatigue; Mandrel; Rail bolt hole; Sleeve; Flashwelds; Vacuum; Crack growth rate
Abstract: The bolt-hole cold-expansion process has been demonstrated by laboratory tests to significantly affect the initiation and propagation of fatigue cracks from rail bolt holes such...
Report Number
DOT/FRA/ORD-80/05.III
Office
RDI-20
1
Jan
1980
Technical Reports
Track Rehabilitation and Maintenance Research Requests
Subject
Track,
Evaluation
Keywords: Research Requirements, Ties, Fasteners, Rail, Track, Ballast, Track Program
Abstract: The Federal Railroad Administration has established a research and development program aimed at improving railroad track safety and performance. As part of the support of that...
Report Number
FRA/OR&D-80/09
Office
RRD
1
Nov
1979
Technical Reports
Mechanical Impedance Evaluations of the Kansas Test Track: Pretraffic and Posttraffic Tests
Subject
Facilities & Test Equipment
Keywords: Velocity Transfer Ratio, Linear Idealization, Performance Comparisons, Track Structure Response
Abstract: The Kansas Test Track (KTT) was comprised of nine different track systems whose dynamic response was measured in two series of impedance tests. Pretraffic impedance testing was...
Report Number
FRA/ORD-79/10
Office
RDI-22