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Materials 2016, 9(11), 894; doi:10.3390/ma9110894

An Integrated Health Monitoring Method for Structural Fatigue Life Evaluation Using Limited Sensor Data

1
School of Reliability and System Engineering, Beihang University, Beijing 100191, China
2
School of Energy and Power Engineering, Beihang University, Beijing 100191, China
3
Siemens Corporation, Corporate Technology, 755 College Rd. E., Princeton, NJ 08540, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Zahra Sharif Khodaei
Received: 29 August 2016 / Revised: 31 October 2016 / Accepted: 31 October 2016 / Published: 4 November 2016
(This article belongs to the Special Issue Advances in Structural Health Monitoring for Aerospace Structures)
View Full-Text   |   Download PDF [4394 KB, uploaded 15 November 2016]   |  

Abstract

A general framework for structural fatigue life evaluation under fatigue cyclic loading using limited sensor data is proposed in this paper. First, limited sensor data are measured from various sensors which are preset on the complex structure. Then the strain data at remote spots are used to obtain the strain responses at critical spots by the strain/stress reconstruction method based on empirical mode decomposition (REMD method). All the computations in this paper are directly performed in the time domain. After the local stress responses at critical spots are determined, fatigue life evaluation can be performed for structural health management and risk assessment. Fatigue life evaluation using the reconstructed stresses from remote strain gauge measurement data is also demonstrated with detailed error analysis. Following this, the proposed methodology is demonstrated using a three-dimensional frame structure and a simplified airfoil structure. Finally, several conclusions and future work are drawn based on the proposed study. View Full-Text
Keywords: limited sensor data; structural health monitoring; empirical mode decomposition; fatigue life evaluation limited sensor data; structural health monitoring; empirical mode decomposition; fatigue life evaluation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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He, J.; Zhou, Y.; Guan, X.; Zhang, W.; Wang, Y.; Zhang, W. An Integrated Health Monitoring Method for Structural Fatigue Life Evaluation Using Limited Sensor Data. Materials 2016, 9, 894.

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