Fatigue reliability under stochastic load
- Polytechnic of Milan (Italy). Dept. of Structural Engineering
- Inst. of Fundamental Technological Research, Warsaw (Poland). Centre of Mechanics
In this paper a model developed by the authors for crack growth under stochastic loading incorporating sequence effects if inserted into fatigue reliability analysis. The goal is the estimation of the probability distribution of the number of cycles to failure. A probabilistic fracture mechanics crack growth model is used to quantify fatigue damage for a given number of cycles. The important sources of uncertainties include fatigue resistance, external loading and initial crack size. Suitable probabilistic models for the above variables are presented and the advanced mean value first order (AMVFO) methods is used to minimize the number of functions to be evaluated in the computation of the probability of failure. A numerical example showing the calculation of the probability distribution of the number of cycles to failure of a structural element is presented.
- OSTI ID:
- 194306
- Report Number(s):
- CONF-950695--; ISBN 0-7918-1308-8
- Country of Publication:
- United States
- Language:
- English
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