Use of FBG Sensors for SHM in Aerospace Structures

Kahandawa, Gayan; Epaarachchi, Jayantha; Wang, Hao; Lau, Kin-tak

doi:10.1007/s13320-012-0065-4

Cited by 158 publications

(91 citation statements)

References 22 publications

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“…A primary benefit of using FBG technology is the multiplexability of the optical sensors that enables the monitoring of a high-density strain distribution using a single fiber [2,3]. In applications that require a large number of sensors, significant cost savings per sensor is realized when compared to the installation cost of conventional foil strain gages.…”

Section: Fbg Featuresmentioning

confidence: 99%

Large Scale Applications Using FBG Sensors: Determination of In-Flight Loads and Shape of a Composite Aircraft Wing

Nicolas¹,

Sullivan²,

Richards

2016

Aerospace

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Abstract:Technological advances have enabled the development of a number of optical fiber sensing methods over the last few years. The most prevalent optical technique involves the use of fiber Bragg grating (FBG) sensors. These small, lightweight sensors have many attributes that enable their use for a number of measurement applications. Although much literature is available regarding the use of FBGs for laboratory level testing, few publications in the public domain exist of their use at the operational level. Therefore, this paper gives an overview of the implementation of FBG sensors for large scale structures and applications. For demonstration, a case study is presented in which FBGs were used to determine the deflected wing shape and the out-of-plane loads of a 5.5-m carbon-composite wing of an ultralight aerial vehicle. The in-plane strains from the 780 FBG sensors were used to obtain the out-of-plane loads as well as the wing shape at various load levels. The calculated out-of-plane displacements and loads were within 4.2% of the measured data. This study demonstrates a practical method in which direct measurements are used to obtain critical parameters from the high distribution of FBG sensors. This procedure can be used to obtain information for structural health monitoring applications to quantify healthy vs. unhealthy structures.

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Section: Fbg Featuresmentioning

confidence: 99%

Large Scale Applications Using FBG Sensors: Determination of In-Flight Loads and Shape of a Composite Aircraft Wing

Nicolas¹,

Sullivan²,

Richards

2016

Aerospace

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“…Along with fiber-optic techniques such as Fiber-Bragg-Grating sensors [4,5], an ultrasonic guided waves-based solution such as those making use of Lamb waves is one of the promising techniques for SHM due to its long-range inspection capability up to several meters [6,7], which is suitable for monitoring large structures such as an aircraft fuselage. Also, in comparison to the FBG technique, Lamb wave SHM sensors typically require less complicated installations.…”

Section: Introductionmentioning

confidence: 99%

Transducer Placement Option of Lamb Wave SHM System for Hotspot Damage Monitoring

2018

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Abstract:In this paper, we investigated transducer placement strategies for detecting cracks in primary aircraft structures using ultrasonic Structural Health Monitoring (SHM). The approach developed is for an expected damage location based on fracture mechanics, for example fatigue crack growth in a high stress location. To assess the performance of the developed approach, finite-element (FE) modelling of a damage-tolerant aluminum fuselage has been performed by introducing an artificial crack at a rivet hole into the structural FE model and assessing its influence on the Lamb wave propagation, compared to a baseline measurement simulation. The efficient practical sensor position was determined from the largest change in area that is covered by reflected and missing wave scatter using an additive color model. Blob detection algorithms were employed to determine the boundaries of this area and to calculate the blob centroid. To demonstrate that the technique can be generalized, the results from different crack lengths and from tilted crack are also presented.

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“…There are a number of reasons why their diffusion into these markets has been so slow; from lack of awareness and trust in the technology, to deficiencies in the physical engineering of appropriate transducers for rugged environments, as well as the complexity and cost of FBG sensor networks. Moreover, the lack of FBG sensing and interrogation standards, means the technology has only significantly progressed in niche applications, such as structural health monitoring [6,7] and protection of industrial assets [8], which will not be covered in detail in this review article. An extensive review of fibre based opto-acoustic sensors used in structural health monitoring is given in [9] and a review of optical fibre sensors specifically for physical security applications is provided in [10].…”

Section: Introductionmentioning

confidence: 99%

Fiber Bragg Grating Sensors for Mainstream Industrial Processes

2017

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This paper reviews fiber Bragg grating sensing technology with respect to its use in mainstream industrial process applications. A review of the various types of sensors that have been developed for industries such as power generation, water treatment and services, mining, and the oil and gas sector has been performed. A market overview is reported as well as a discussion of some of the factors limiting their penetration into these markets. Furthermore, the author's make recommendations for future work that would potentially provide significant opportunity for the advancement of fiber Bragg grating sensor networks in these mainstream industries.

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Use of FBG Sensors for SHM in Aerospace Structures

Cited by 158 publications

References 22 publications

Large Scale Applications Using FBG Sensors: Determination of In-Flight Loads and Shape of a Composite Aircraft Wing

Large Scale Applications Using FBG Sensors: Determination of In-Flight Loads and Shape of a Composite Aircraft Wing

Transducer Placement Option of Lamb Wave SHM System for Hotspot Damage Monitoring

Fiber Bragg Grating Sensors for Mainstream Industrial Processes

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