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**Harvard**

Rosell, A. och Persson, G. (2013) *Model Based Capability Assessment of an Automated Eddy Current Inspection Procedure on Flat Surfaces*.

** BibTeX **

@article{

Rosell2013,

author={Rosell, Anders and Persson, Gert},

title={Model Based Capability Assessment of an Automated Eddy Current Inspection Procedure on Flat Surfaces},

journal={Research in nondestructive evaluation},

issn={0934-9847},

volume={24},

issue={3},

pages={154-176},

abstract={The probability of detection (POD) of a well-controlled, automated eddy current (EC) procedure is evaluated in a numerical model and compared with experiments. The procedure is applied in laboratory environment with a single absolute probe which is positioned for raster scan over flat surfaces containing fatigue cracks. The variability of the signal amplitude, due to small fatigue cracks in the Titanium alloy Ti-6Al-4 V, is expected to mainly originate from crack characteristics and the index distance of the raster scan. The POD model is based on the signal versus crack size ( versus a) result. The presented procedure provides a well-defined basis for a comparison between a simulated and an experimentally based POD assessment. Finite element analysis is used to model the EC method. A simplified fatigue crack model is first introduced and evaluated experimentally. Numerical computations are then used to build the corresponding model-based POD curve which shows good agreement with the experimental result. The model-based POD curve is generated both by means of a parametric and a nonparametric approach. Differences between model-based and experimental POD are discussed as well as the delta POD approach using transfer functions.},

year={2013},

keywords={eddy current, probability of detection (POD), model-based POD},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 181434

A1 Rosell, Anders

A1 Persson, Gert

T1 Model Based Capability Assessment of an Automated Eddy Current Inspection Procedure on Flat Surfaces

YR 2013

JF Research in nondestructive evaluation

SN 0934-9847

VO 24

IS 3

SP 154

OP 176

AB The probability of detection (POD) of a well-controlled, automated eddy current (EC) procedure is evaluated in a numerical model and compared with experiments. The procedure is applied in laboratory environment with a single absolute probe which is positioned for raster scan over flat surfaces containing fatigue cracks. The variability of the signal amplitude, due to small fatigue cracks in the Titanium alloy Ti-6Al-4 V, is expected to mainly originate from crack characteristics and the index distance of the raster scan. The POD model is based on the signal versus crack size ( versus a) result. The presented procedure provides a well-defined basis for a comparison between a simulated and an experimentally based POD assessment. Finite element analysis is used to model the EC method. A simplified fatigue crack model is first introduced and evaluated experimentally. Numerical computations are then used to build the corresponding model-based POD curve which shows good agreement with the experimental result. The model-based POD curve is generated both by means of a parametric and a nonparametric approach. Differences between model-based and experimental POD are discussed as well as the delta POD approach using transfer functions.

LA eng

DO 10.1080/09349847.2013.779401

LK http://dx.doi.org/10.1080/09349847.2013.779401

LK http://publications.lib.chalmers.se/records/fulltext/181434/local_181434.pdf

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