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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Journal of Nondestru...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Journal of Nondestructive Evaluation
Article . 1997 . Peer-reviewed
License: Springer TDM
Data sources: Crossref
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Magnetic pressure stressing of lap joints: Modeling and experimental verification

Authors: Donna J. Mayton; Douglas A. Oursler; James W. Wagner;

Magnetic pressure stressing of lap joints: Modeling and experimental verification

Abstract

A novel electromagnetic stressing/optical detection method has been developed in response to the need for better nondestructive evaluation techniques for the detection of disbonds in aging aircraft lap joints. This technique uses magnetic pressure to pull the top surface of a thin conductive bonded sheet and senses the out-of-plane displacement of the surface with an optical lever fiber bundle detector. This method of inspection has the advantages of being noncontacting, relatively inexpensive, and because it pulls on the top surface, is a promising candidate for the detection of “kissing” disbonds—a condition in which there is no material missing from the joint, but the bond has failed. A series of three models was developed and implemented to simulate system performance from the driving circuitry to the measured response of the sample. Using a computer model of the driving circuit, component value variations could be analyzed to optimize the current through the electromagnetic coil as a function of time. An analytical pressure model was developed to predict pressure on the sample as a function of time for a given current waveform input. The predicted pressure was then used as the driving function in a finite element structural model which predicted displacement of the sample surface. Laboratory experiments were conducted on simple bonded and unbonded samples, and the two cases exhibited large differences in amplitude, resonant frequency, and damping. Test results compared favorably to the predicted displacement data. The close correspondence between measured and predicted results indicates that the models are useful not only in the system design but also as a means to predict performance.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
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