Real time failure detection in unreinforced cementitious composites with triboluminescent sensor

Olawale, David; Kliewer, Kaitlyn; Okoye, Annuli; Dickens, Tarik; Uddin, M. Jasim; Okoli, Okenwa I.

doi:10.1016/j.jlumin.2013.11.050

Cited by 28 publications

(8 citation statements)

References 12 publications

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“…Triboluminescent materials, unlike well-known photoluminescence materials, have the advantage of emission without requiring a light source [146][147][148] . The fractureinduced luminescent properties of triboluminescent materials make them attractive for applications as structural damage sensors and pressure sensors and for advanced security marking techniques [149][150][151][152] .…”

Section: Mechanosensitized Luminescencementioning

confidence: 99%

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

2018

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The 4f-4f emission of Tb(III), Eu(III), and Sm(III) complexes plays an important role in the design of monochromatic green, red, and deep-red luminescent materials for displays, lighting, and sensing devices. The 4f-4f emission of Yb(III), Nd(III), and Er(III) complexes is observed in the near-infrared (IR) region for bioimaging and security applications. However, their absorption coefficients are extremely small (ε < 10 L mol −1 cm −1 ). In this review, photosensitized luminescent lanthanide(III) complexes containing organic chromophores (ligands) with large absorption coefficients (ε > 10,000 L mol −1 cm −1 ) are introduced. Organic molecular design elements, including (1) the control of the excited triplet (T 1 ) state, (2) the effects on the charge-transfer (CT) band, and (3) the energy transfer from metal ions for effective photosensitized luminescence, are explained. The characteristic electrosensitized luminescence (electroluminescence) and mechanoluminescence (triboluminescence) of lanthanide(III) complexes are also explained. Lanthanide(III) complexes with well-designed organic molecules are expected to open avenues of research among the fields of chemistry, physics, electronics, and material science.

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Section: Mechanosensitized Luminescencementioning

confidence: 99%

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

2018

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“…The most commonly used sensors are electrical strain sensors, accelerometers, inclinometers, GPS based sensors, acoustic emission, wave propagation and more. Worth of mention are also in-situ triboluminescent optical fiber (ITOF) capable of yielding multifunctional smart structures with in-situ failure detection capabilities [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Distributed Optical Fiber Sensing Bonding Techniques Performance for Embedment inside Reinforced Concrete Structures

Bado

Casas

Dey

et al. 2020

Sensors

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Distributed optical fiber sensors (DOFS) are modern-day cutting-edge monitoring tools that are quickly acquiring relevance in structural health monitoring engineering. Their most ambitious use is embedded inside plain or reinforced concrete (RC) structures with the scope of comprehending their inner-workings and the functioning of the concrete-reinforcement interaction. Yet, multiple studies have shown that the bonding technique with which the DOFS are bonded to the reinforcement bars has a significant role on the quality of the extracted strain data. Whilst this influence has been studied for externally bonded DOFS, it has not been done for embedded ones. The present article is set on performing such study by monitoring the strain measurement quality as sampled by DOFS bonded to multiple rebars with different techniques and adhesives. These instrumented rebars are used to produce differently sized RC ties later tested in tension. The discussion of the test outputs highlights the quasi-optimal performance of a DOFS/rebar bonding technique consisting of incising a groove in the rebar, positioning the DOFS inside it, bonding it with cyanoacrylate and later adding a protective layer of silicone. The resulting data is mostly noise-free and anomalies-free, yet still presents a newly diagnosed hitch that needs addressing in future research.

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“…The focus of this study is to develop a new sensor system for load monitoring which is based on the proprietary in situ triboluminescent optical fiber (ITOF) sensor (Olawale, 2013;Olawale et al, 2011Olawale et al, , 2014Olawale et al, , 2016b. Figure 1 is a schematic diagram of the ITOF sensor.…”

Section: Introductionmentioning

confidence: 99%

“…Figure 1 is a schematic diagram of the ITOF sensor. The ITOF sensor has the capability of detecting in situ damage in cementitious composites (Olawale et al, 2014(Olawale et al, , 2016b or monitoring real-time damage in the adhesive bond of composite structures (Shohag et al, 2016b). The new sensor network patch, ITOFPress consists of an ITOF sensor network with micro-exciters integrated within a polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Development of friction-induced triboluminescent sensor for load monitoring

Shohag

Jiang

Hammel

et al. 2017

Journal of Intelligent Material Systems and Structures

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Real-time load monitoring of critical civil and mechanical structures especially dynamic structures such as wind turbine blades is imperative for longer service life. This article proposed a novel sensor system based on the proprietary in situ triboluminescent optical fiber (ITOF) sensor for dynamic load monitoring. The new ITOF sensor patch consists of an ITOF sensor network with micro-exciters integrated within a polymer matrix. The sensor patch was subjected to repeated flexural loading and produced triboluminescent emissions due to the friction between micro-exciters and ITOF sensors corresponding to each loading cycle. The friction-induced triboluminescent intensity directly depends on the loading rate, the coefficient of friction, and the applied load on patch. In general, the triboluminescent intensity increases exponentially with an increase in load. Additionally, the sensor patches comprising the coarser micro-exciters exhibited better results. Similarly, better results were achieved at higher loading rates although a threshold loading rate is required to excite the triboluminescent crystals for this sample configuration. The proposed new sensor has the ability to monitor dynamic continuous applied loads.

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Real time failure detection in unreinforced cementitious composites with triboluminescent sensor

Cited by 28 publications

References 12 publications

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

Effective photosensitized, electrosensitized, and mechanosensitized luminescence of lanthanide complexes

Distributed Optical Fiber Sensing Bonding Techniques Performance for Embedment inside Reinforced Concrete Structures

Development of friction-induced triboluminescent sensor for load monitoring

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