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http://dx.doi.org/10.7734/COSEIK.2012.25.3.267

Experimental Validation of Crack Growth Prognosis under Variable Amplitude Loads  

Leem, Sang-Hyuck (한국항공대학교 항공우주 및 기계공학과)
An, Dawn (한국항공대학교 항공우주 및 기계공학과)
Lim, Che-Kyu (한국항공대학교 항공우주 및 기계공학과)
Hwang, Woongki (한국항공대학교 항공우주 및 기계공학과)
Choi, Joo-Ho (한국항공대학교 항공우주 및 기계공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.25, no.3, 2012 , pp. 267-275 More about this Journal
Abstract
In this study, crack growth in a center-cracked plate is predicted under mode I variable amplitude loading, and the result is validated by experiment. Huang's model is employed to describe crack growth with acceleration and retardation due to the variable loading effect. Experiment is conducted with Al6016-T6 plate, in which the load is applied, and crack length is measured periodically. Particle Filter algorithm, which is based on the Bayesian approach, is used to estimate model parameters from the experimental data, and predict the crack growth of the future in the probabilistic way. The prediction is validated by the run-to-failure results, from which it is observed that the method predicts well the unique behavior of crack retardation and the more data are used, the closer prediction we get to the actual run-to-failure data.
Keywords
prognostics and health management; model-based prognostics; bayesian inference; particle filter; variable amplitude loading; crack growth;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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