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Bolt hole eddy current testing probability of detection Part I: experimental design and data analysis

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Aerospace Research
FormatText, Article
ConferenceThe 12th International Conference on Fracture (ICF 12), July 12-17, 2009, Ottawa, Ontario, Canada
Subjectinspection reliability; probability of detection; NDI/NDE reliability; eddy current; damage tolerance
Abstract
Nondestructive testing (NDT) plays a critical role in Damage Tolerance (DT) life cycle management of aircraft structures. The DT approach relies on periodic inspections of critical components and the ability of NDT to detect cracks before reaching a critical size. The NDT detection sensitivity and reliability are typically characterized by establishing Probability of Detection (POD) as a function of discontinuity size. Under a contract from the Canadian Department of National Defence (DND), a study was carried out to determine the POD of an eddy current procedure for detecting cracks in the bolt holes of typical CC130 Hercules and CP140 Aurora aircraft wing box lap joint structures. The goal of the project was to generate the POD data for aircraft life-management purposes and to establish the validity of the currently assumed detectable discontinuity sizes. This paper describes the design and manufacture of the specimens used as well as the eddy current inspections and analysis carried out to obtain POD. Finally, the ability of the bolt-hole eddy current method in detecting cracks in different lap joint configurations is discussed in terms of the detectable crack size at 90% POD with 95% confidence. In the second part of the paper, which is presented separately, the use of numerical modeling to estimate POD and its performance as compared to the experimental POD results is described.
Publication date
PublisherCurran Associates
Access condition
  • available
  • unclassified
  • unlimited
In
  • 12th International Conference on Fracture 2009, ICF-12 1 (2009): 733–741.
LanguageEnglish
Peer reviewedYes
NRC numberSMPL-2008-0106
NPARC number8931311
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Record identifier92d7a726-b956-4e94-839c-7ae34bcfd736
Record created2009-04-23
Record modified2023-04-19
Date modified: