Probabilistic Fatigue Failure Analysis of a Railroad Freight Car |
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| Authors: | J. Mohammadi V. K. Garg N. Subei |
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| Affiliation: | a Assistant Professor, Civil Engineering Department, Illinois Institute of Technology, Chicago, Illinois, U.S.A.b Assoc. Professor, Mechanical Engineering Department, University of Maine, Orono, Maine, U.S.A.c Graduate Student, Civil Engineering Department, Illinois Institute of Technology, Chicago, Illinois, U.S.A. |
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| Abstract: | The critical components of railroad fraight cars are subjected to fluctuating stresses and, therefore, vulnerable to fatigue damage. These fluctuating stresses result from different motions of the car when it travels along a track and is subjected to various track irregularities. Both the track irregularities and corresponding motions are highly random. Therefore, the fatigue damage can only be determined by means of a percentage probability level. This paper describes a probability-based method for evaluating fatigue damage in a freight car. The effect of uncertain boundary conditions for the car in the calculations of fatigue damage is also discussed. The applications of the method to carbody design and assessment of fatigue life are also explained |
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