Fatigue life prediction using hybrid prognosis for structural health monitoring

Rajesh Kumar Neerukatti, Kuang C. Liu, Narayan Kovvali, Aditi Chattopadhyay

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


Because metallic aircraft components are subject to a variety of in-service loading conditions, predicting their fatigue life has become a critical challenge. To address the failure mode mitigation of aircraft components and at the same time reduce the life-cycle costs of aerospace systems, a reliable prognostics framework is essential. In this paper, a hybrid prognosis model that accurately predicts the crack growth regime and the residual-useful-life estimate of aluminum components is developed. The methodology integrates physics-based modeling with a data-driven approach. Different types of loading conditions such as constant amplitude, random, and overload are investigated. The developed methodology is validated on an Al 2024-T351 lug joint under fatigue loading conditions. The results indicate that fusing the measured data and physics-based models improves the accuracy of prediction compared to a purely data-driven or physics-based approach.

Original languageEnglish (US)
Pages (from-to)211-231
Number of pages21
JournalJournal of Aerospace Information Systems
Issue number4
StatePublished - Apr 2014

ASJC Scopus subject areas

  • Aerospace Engineering
  • Computer Science Applications
  • Electrical and Electronic Engineering


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