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NTL Classification: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;
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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.
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