Managing uncertainties in fatigue damage prognosis using piezoelectric transducers

Damage Prognosis is estimating the systems remaining lifespan by measuring the current state of the system, estimating the future loading environment for the system, and predicting through simulation. An accurate Prognosis could help to predict the structural failure before it take place, hence to p...

全面介紹

Saved in:
書目詳細資料
主要作者: Hu, Shan.
其他作者: Soh Chee Kiong
格式: Final Year Project
語言:English
出版: 2013
主題:
在線閱讀:http://hdl.handle.net/10356/53825
標簽: 添加標簽
沒有標簽, 成為第一個標記此記錄!
機構: Nanyang Technological University
語言: English
實物特徵
總結:Damage Prognosis is estimating the systems remaining lifespan by measuring the current state of the system, estimating the future loading environment for the system, and predicting through simulation. An accurate Prognosis could help to predict the structural failure before it take place, hence to prevent unwanted losses of structure and human lives. Damage Prognosis is affected by many aspect of uncertainties, which are physical variability, material variability, data uncertainty and modelling errors. In this research, data uncertainty is investigated by experiments and numerical studies. The experiments were carried out on laboratory aluminium plate specimens by Lamb Wave Method, and Monte Carlo simulation is used for numerical studies. However, the proposed method of Damage Prognosis is not ideal, as it always underestimated the lifespan of the specimen. Further study is necessary to improve the accuracy of the prediction.