Aging Aircraft NDE: Capabilities, Challenges, and Opportunities

Lindgren, Eric A.; Knopp, Jeremy S.; Aldrin, John C.; Steffes, Gary; Buynak, Charles

doi:10.1063/1.2718173

Cited by 21 publications

(11 citation statements)

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“…To analyze the challenges to realize a reproducible capability over an extended period of time, it is beneficial to deconstruct the challenges into three general categories [15]. The first addresses the method being used to perform the inspection.…”

Section: Challenges For Validationmentioning

confidence: 99%

SHM reliability and implementation – A personal military aviation perspective

Lindgren¹

2016

AIP Conference Proceedings

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Section: Challenges For Validationmentioning

confidence: 99%

SHM reliability and implementation – A personal military aviation perspective

Lindgren¹

2016

AIP Conference Proceedings

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“…As demands for data management plans and access to database archival systems increase, the need for accurate and retrievable metadata that describes the context of the data file becomes increasingly important [1]. For NDE systems, obtaining accurate metadata often relies on the dedication and motivation of the system operator.…”

Section: Introductionmentioning

confidence: 99%

Reactive documentation system

Boehnlein

Kramb

2018

AIP Conference Proceedings

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Abstract. Proper formal documentation of computer acquired NDE experimental data generated during research is critical to the longevity and usefulness of the data. Without documentation describing how and why the data was acquired, NDE research teams lose capability such as their ability to generate new information from previously collected data or provide adequate information so that their work can be replicated by others seeking to validate their research. Despite the critical nature of this issue, NDE data is still being generated in research labs without appropriate documentation. By generating documentation in series with data, equal priority is given to both activities during the research process. One way to achieve this is to use a reactive documentation system (RDS). RDS prompts an operator to document the data as it is generated rather than relying on the operator to decide when and what to document. This paper discusses how such a system can be implemented in a dynamic environment made up of in-house and third party NDE data acquisition systems without creating additional burden on the operator. The reactive documentation approach presented here is agnostic enough that the principles can be applied to any operator controlled, computer based, data acquisition system.

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“…There is a growing need to also accurately evaluate the dimensions of any detected cracks in order to properly guide necessary repairs and support condition-based maintenance (CBM) programs [1]. The current practice to size cracks in terms of surface length and depth uses the eddy current response amplitude along with an underlying assumption on the aspect ratio based on empirical data from POD specimens.…”

Section: Introductionmentioning

confidence: 99%

Model-based inverse methods for sizing surface-breaking discontinuities with eddy current probe variability

Aldrin¹,

Shell

Oneida

et al. 2016

AIP Conference Proceedings

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Abstract. The objective of this work is to demonstrate and validate model-based inversion techniques to characterize length, depth, width and orientation of surface-breaking cracks using eddy current NDE under varying probe conditions. A series of parametric studies of probe characteristics are presented for a fixed set of well-characterized flaws with varying length, depth, opening width and orientation angle. Results show inversion performance differences between probes with the same design specifications. Inversion results were also evaluated for a probe that was selectively controlled for varying probe liftoff, varying tilt in two directions, and orientation. Certain levels of probe tilt and liftoff were found to degrade the performance of the inversion technique. By using a model calibration process that incorporates the matching probe calibration data, better inversion results can be achieved, to a limited degree. There is a need to more appropriately adapt the model through the calibration fit to compensate for varying probe tilt and liftoff. Results are presented for a model transform approach, evaluating scale and phase terms based on the best model fit with the calibration data. The results for certain severe cases of liftoff were improved using the transformed model; however, it does not address all probe conditions. Future work is proposed to use a full model-based transformation approach using more comprehensive meta-model representations.

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Aging Aircraft NDE: Capabilities, Challenges, and Opportunities

Cited by 21 publications

References 0 publications

SHM reliability and implementation – A personal military aviation perspective

SHM reliability and implementation – A personal military aviation perspective

Reactive documentation system

Model-based inverse methods for sizing surface-breaking discontinuities with eddy current probe variability

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