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Influence of frequency and damage index estimation method on the probability of detection of fatigue cracks by a sparse array SHM system

Authors: Lucas Dorneles (Universidade Federal do Rio de Janeiro) , Henrique Oliveira (Universidade Federal do Rio de Janeiro) , Thomas Clarke (Universidade Federal do Rio de Janeiro) , Fernando Dotta (Embraer) , Leandro Coutinho (Embraer) , André Tamba (Embraer) , Ricardo Rulli (Embraer)

Abstract

In this paper the probability of detection of fatigue cracks in complex aeronautical aluminum panels by a guided wave structural health monitoring system is evaluated. The effects of operating frequency and sensor positioning relative to the defect were quantified, and showed a marked influence on the results. Different methods of calculation of a damage index and their corresponding thresholds were considered, and their effect on the sensitivity of the system to the defects was also evaluated.

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How to Cite: Dorneles, L. , Oliveira, H. , Clarke, T. , Dotta, F. , Coutinho, L. , Tamba, A. & Rulli, R. (2019) “Influence of frequency and damage index estimation method on the probability of detection of fatigue cracks by a sparse array SHM system”, 46th Annual Review of Progress in Quantitative Nondestructive Evaluation.(0).