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Fatigue Reliability of Components Containing Microstructural Flaws

by A. Br?ckner-Foit, Univ of Karlsruhe, Germany,
H. J?ckels, Univ of Karlsruhe, Germany,
H. Lahodny, Univ of Karlsruhe, Germany,
D. Munz, Univ of Karlsruhe, Germany,



Document Type: Proceeding Paper

Part of: Structural Safety and Reliability

Abstract:

A probabilistic crack growth model is presented in which the different stages of crack growth including the small crack regime are taken into account. The microstructural parameter determining the scatter of the crack velocity is in the grain size. This probabilistic crack growth model can be used to determine the lifetime distribution of high strength components subjected to fatigue loading. A verification procedure for the model is sketched in which the results of Monte Carlo simulations are compared with experimental data obtained from low cycle fatigue tests of smooth specimens.

Subject Headings: Cracking | Fatigue tests | Probability | Microstructure | Fatigue (material) | Verification | Simulation models

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