&lt;title&gt;Magnetic activation of embedded sensory particles in active tagging interrogation of adhesive bonding&lt;/title&gt;

Sun, Fanping; Chen, Liang; Rogers, Craig A.; Vick, Linda

doi:10.1117/12.147997

Cited by 4 publications

(2 citation statements)

References 1 publication

(1 reference statement)

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“…Susceptibility imaging may prove ideal for this application, but workers outside the SQUID field are trying to build in inspectability by 'tagging'. Tagging [103][104][105] is a process whereby a small quantity of fine magnetic particles is incorporated into the composite matrix before curing. It makes inspection by conventional means possible; however, too many of these tracer particles can degrade the performance of the composite.…”

Section: Nonconducting Materialsmentioning

confidence: 99%

SQUIDs for nondestructive evaluation

Jenks

Sadeghi

Wikswo

1997

J. Phys. D: Appl. Phys.

138

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We attempt a comprehensive review of all published research in nondestructive evaluation (NDE) performed with the superconducting quantum interference device (SQUID) magnetometer since the first work was reported in the mid-1980s. The SQUID is the most sensitive detector of magnetic flux known. The energy sensitivity of the SQUID may make it the most sensitive detector of any kind. The research on SQUIDs for NDE is based on the promise of that sensitivity and on the various other desirable properties developed for SQUID instrumentation in biomagnetism and other fields. The sensitivity of SQUID instruments down to very low frequencies allows them to function as eddy-current sensors with unparalleled depth resolution, and to image the static magnetization of paramagnetic materials and the flow of near-dc corrosion currents. The wide dynamic range of the SQUID makes it possible to image defects in steel structures and to measure the magnetomechanical behaviour of ferromagnetic materials with high sensitivity. In the last decade SQUID instrumentation designed specifically for NDE has appeared and improved the spatial resolution of most work to roughly 1 mm, with promise of another order of magnitude improvement within the next five years. Algorithms for flaw detection and image deconvolution have begun to flourish. With many talented, industrious people in the field, the future of SQUID NDE looks bright, provided the crucial first niche can be found.

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Section: Nonconducting Materialsmentioning

confidence: 99%

SQUIDs for nondestructive evaluation

Jenks

Sadeghi

Wikswo

1997

J. Phys. D: Appl. Phys.

138

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“…The result of this technology, a &dquo;tagged composite&dquo; that has the ability to respond to magnetic excitation, offers good opportunities for developing new NDE methods and tech-niques. Several theoretical studies (Sun, Liang, Rogers, and Vick, 1993;Rogers et al, 1995;Quattrone, 1995a and1995b) have been performed to assess this technology and to find the most promising methods for in-service and in-field implementation.…”

Section: Introductionmentioning

confidence: 99%

Passive and Active Tagging of Glass-Fiber Polymeric Composites for In-Process and In-Field Non-Destructive Evaluation

Giurgiutiu

Chen

Lalande

et al. 1996

Journal of Intelligent Material Systems and Structures

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Conventional non-destructive evaluation (NDE) methods are not very effective in monitoring the material conditions of advanced composite and adhesive joints. A technology that has been proposed to enhance the inspectability of advanced composites is the particle tagging technique. Two theoretical models were recently proposed to characterize the dynamic behavior of ferromagnetic and magnetostrictive tagging particles. These theoretical models concerning the development of an active tagging technique with embedded ferromagnetic and magnetostrictive particles and magnetic excitation are now experimentally verified. The experimental results of the active particle tagging shows a variation in the dynamic response of the specimens when defects and/or damage are present. The sensory signature from a tagged polymer is extracted as a result of the interaction between the embedded particles and their host matrix. A study of various types of composites and tagging particles for passive and active tagging was performed. Experimental validation of concepts for tagging of structural materials for on-site inspection prior to installation have also been explored. The on-site particle tagging inspection has been verified on laboratory specimens obtained from industry and was shown to be very efficient.

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