The Stochastic Model of Fatigue Crack Growth For Reliability-Based Design

Xiong Junjiang
(Institute of Solid Mechanics, Beijing University of Aeronaustic and Astronaustic)

Abstract: First of all, the determinatic growth equation of fatigue crack is presented. After randomization of the determinatic equation, the random growth equation of fatigue crack is derived. Then the confidence limit equation of fatigue crack growth is obtained. At last, two examples that the data of two kinds of material are analyzed are given.
Keywords: determinatic, stochastic, probability, confidence level, fatigue carck growth.