Total Life Approach Based Creep-Fatigue-Oxidation Modeling  
Author Zhigang Wei


Co-Author(s) Fulun Yang; Burt Lin; Limin Luo; Dmitri Konson


Abstract Cycle-dependent fatigue and time-dependent creep/oxidation are the principal damage and failure mechanisms in many hightemperature applications. The damage and life assessment methods consist of two approaches: crack growth approach and total life approach. The total life approach is more commonly used in engineering designs than the crack growth approach, however, it is more difficult to deal with not only in mechanisms identification (damage initiation and growth) in a modeling process but also in data correlation because of the large scatter nature of total life data. In this paper, a general total life based creep-fatigue model, which is essentially based on tested data and a simple inverse engineering approach, is proposed. With this approach, both the accuracy and the applicability can be achieved. Oxidation effect on the creep-fatigue interaction diagram is also discussed


Keywords Creep-fatigue-oxidation, Total life approach, High temperature applications
    Article #:  1833
Proceedings of the 18th ISSAT International Conference on Reliability and Quality in Design
July 26-28, 2012 - Boston, Massachusetts, U.S.A.