AGR-INFRASTRUCTURE-Railroads;NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION;NTL-RAIL TRANSPORTATION-Rail Safety;NTL-SAFETY AND SECURITY-Vehicle Design;NTL-SAFETY AND SECURITY-Rail Safety;NTL-SAFETY AND SECURITY-SAFETY AND SECURITY;
Abstract:
Fatigue crack initiation properties of rail-steels were determined experimentally. One new and four used rail steels were investigated. The effects of the following parameters were studied: stress ratio (ratio of minimum to maximum stress in a cycle), control mode, specimen orientation, and periodic overstrain. Both constant and variable strain amplitude experiments were performed. A model was developed, employing an equivalent strain parameter, which allowed prediction of variable amplitude fatigue crack initiation within the basic data variability.
Elber's crack closure model is studied in relation to the results of laboratory spectrum crack growth tests on compact tension specimens (CTS) fabrica...
In order to establish safe inspection periods of railroad rails, information on fatigue crack growth rates is required. These data should come from a ...
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United States Department of Transportation
[PDF-2.21 MB]
