Technical Reports

Fatigue Crack Initiation Properties of Rail Steels

  • 01
  • Feb
  • 1982
AUTHOR: R. C. Rice, D. Broek
SUBJECT: Evaluation
KEYWORDS: Periodic Overstrain, Equivalent Strain, Rail Stress
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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