Real-time Detection of Debonding between Honeycomb Core and Facesheet using a                 Small-diameter FBG Sensor Embedded in Adhesive Layer

Minakuchi, Shu; Okabe, Yoji; Takeda, Nobuo

doi:10.1177/1099636207064457

Cited by 49 publications

(31 citation statements)

References 19 publications

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“…Minakuchi et al 34 embedded a small-diameter FBG sensor into the adhesive layer of a honeycomb sandwich structures for debonding detection. During the curing process, the reflection spectrum was distorted because the formation of fillets induced non-uniform strain distribution in the adhesive layers between the core and the face sheet.…”

Section: Other Fbg-based Damage Identification Techniquesmentioning

confidence: 99%

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Sotoudeh

Black

Moslehi

et al. 2014

Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014

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A Lamb wave-based damage identification method called damage imaging method for composite shells is presented. A damage index (DI) is generated from the delay matrix of the Lamb wave response signals, and it is used to indicate the location and approximate area of the damage. A piezoelectric actuator is employed to generate the Lamb waves that are subsequently captured by a fiber Bragg grating (FBG) sensor element array multiplexed in a single fiber connected to a high-speed fiber-optic sensor system. The high-speed sensing is enabled by an innovative parallel-architecture optical interrogation system. The viability of this method is demonstrated by analyzing the numerical and experimental Lamb wave response signals from laminated composite shells. The technique only requires the response signals from the plate after damage, and it is capable of performing near real-time damage identification. This study sheds some light on the application of a Lamb wave-based damage detection algorithm for curved plate/shell-type structures by using the relatively low frequency (around 100 kHz) Lamb wave response and the high-speed FBG sensor system.

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Section: Other Fbg-based Damage Identification Techniquesmentioning

confidence: 99%

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Sotoudeh

Black

Moslehi

et al. 2014

Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014

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“…The small-diameter optical fibers (7,39) including FBG sensors are embedded in the adhesive layer between the honeycomb core and the facesheet in a reticular pattern with the lowest density required to quantitatively detect damage whose size is unacceptable for the structure. Since there is no space for optical fibers to go through between the core and the facesheet, small slits are formed on the bottom of the core walls by a wire discharge cutter.…”

Section: Smart Honeycomb Sandwich Concept the Authors Have Been Propomentioning

confidence: 99%

Smart Composite Sandwich Structures for Future Aerospace Application -Damage Detection and Suppression-: a Review

Takeda

Minakuchi

Okabe

2007

JMMP

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Sandwich structures with advanced composite facesheets are attracting much attention as a solution to maximize the potential of composite materials. However, the composite sandwich structures are prone to damage, such as impact damage and debonding. Although these damages are difficult to detect using conventional nondestructive inspection method, they cause significant reduction in the mechanical properties. Hence, several researchers have attempted to detect and suppress the damages using smart sensors and actuators. In this paper recent developments on smart technologies to improve reliability of the composite sandwich structures are reviewed. First, the state-of-the-art sandwich technology in aerospace application is presented. Next, typical damages in composite sandwich structures are described, which is essential to effectively apply the smart technologies to sandwich structures. Then, smart technologies which have been applied to sandwich structures are briefly shown with focusing specific properties of sandwich structures. It includes damage detection using dynamic response, wave propagation and optical fiber sensors. Finally, a smart honeycomb sandwich concept is also presented. State-of-the-art sandwich technology in aerospace structuresSandwich concept has wide range of advantages and potentials over quasi metal-derived design. Since the facesheets are continuously sustained by the core, the global and local stiffening can be achieved. Moreover, the integral simple stiffening reduces the complexity in analysis, manufacturing and maintenance, resulting in cutting the total life cycle cost of the structure. Introduction of sandwich structures in fuselage shells reduces the noise level inside the cabin, because of high damping properties of the core materials, and thus increases passengers' comfort. In this application, an integration of thermal isolation is also possible.

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“…It may be noted that the created numerical models and the results of this work will be used for fundamental investigation devoted to the development of experimental and theoretical principles of the mechanical analysis of smart materials with embedded fiber Bragg grating (FBG) sensors for structural health monitoring (SHM) [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Mechanical Behaviour of Composite Sandwich Panels With Defects

Anoshkin¹,

Ю²,

Alikin³

et al. 2016

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016)

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Real-time Detection of Debonding between Honeycomb Core and Facesheet using a Small-diameter FBG Sensor Embedded in Adhesive Layer

Cited by 49 publications

References 19 publications

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Smart Composite Sandwich Structures for Future Aerospace Application -Damage Detection and Suppression-: a Review

Numerical Simulation of Mechanical Behaviour of Composite Sandwich Panels With Defects

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