Fracture Mechanics Fatigue Reliability Assessment Employing the Most Probable Point Locus Method

by Paul H. Wirsching, Univ of Arizona, United States,
Warren S. Martin, Univ of Arizona, United States,

Document Type: Proceeding Paper

Part of: Probabilistic Methods in Civil Engineering


The statistical distribution of cycle life, N, could be easily constructed if N were an explicit function of the design factors. A simple strategy for constructing the distribution of N is to obtain a set of solutions for perturbed values of the design factors, fitting an approximating polynomial for N, thereby obtaining an explicit form on which the reliability methods can be applied. But the method is considered to be inefficient because there is no strong rational basis for selecting the values of the design factors for the solution set. The most probable point locus (MPPL) method has been proposed by Y.T. Wu as a method for constructing a CDF efficiently by minimizing the number of solution points required. The method is summarized.

Subject Headings: Fatigue life | Structural reliability | Structural design | Structural analysis | Probability | Fracture mechanics | Statistics

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