Utility of Information (UoI) for probabilistic fatigue monitoring

Umberto Alibrandi, Guangli Du, Sandro Diord Rescinho Amador, Rune Brinker

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

Fatigue crack is a problem of concerns for offshore structures. This paper studies the utility of information (UoI) based on the monitoring of fatigue crack. A center-crack specimen with an equivalent constant amplitude stress range is considered as an example to simulate the real fatigue load cases. The failure is introduced by an overload that is applied at a random point in time. Two cases are considered: the case where the fatigue crack is unknown (no possibility to act), and the case where the crack is monitored. With monitoring information, structural performance is assessed at high accuracy level in real-time. This would detect overload and cracks to avoid unnecessary repairing activities and failures. The metric of UoI as a generalization of the Value of Information (VoI) is proposed. The two cases are then compared to quantify the utility of the monitoring information based on the improved decisions. The framework of Sustainable and Resilient Based Engineering (SRBE) recently proposed by one of the authors is adopted. Numerical simulation shows the monitoring information is beneficial to detect critical overloading situations.
Original languageEnglish
Title of host publicationProc. of the 8th Intl. Symp. on Reliability Engineering and Risk Management (ISRERM 2022)
EditorsMichael Beer, Enrico Zio, Kok-Kwang Phoon, Bilal M. Ayyub
PublisherResearch Publishing, Singapore
Publication date4 Sep 2022
Pages662-666
Article numberMS-20-170
ChapterMS20 Risk-informed Digital Twins of Buildings, Bridges, Offshore Structures: Frameworks, Methods, and Tools
ISBN (Electronic)978-981-18-5184-1 (ISBN-13), 981-18-5184-0 (ISBN-10)
DOIs
Publication statusPublished - 4 Sep 2022
EventThe International Symposium on Reliability Engineering and Risk Management (ISRERM) - Leibniz University, Hannover, Germany
Duration: 4 Sep 20227 Sep 2022
https://isrerm.org/

Conference

ConferenceThe International Symposium on Reliability Engineering and Risk Management (ISRERM)
LocationLeibniz University
Country/TerritoryGermany
CityHannover
Period04/09/202207/09/2022
Internet address

Bibliographical note

© 2022 ISRERM 2022 Organisers. All rights reserved.

Keywords

  • Value of information (VoI), information theory, Utility of Information (UoI)
  • Information theory
  • Utility of Information (UoI)
  • Stiffness reduction
  • Fatigue failure
  • Fracture mechanics

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