Cyclic loading behaviour and crack monitoring potential of graphene nanoplatelet (GNP) based strain sensors in simple structures

Sai, M. Swapna; Sethy, Debadatta; Varghese, F. V.; Balasubramaniam, Krishnan

doi:10.1088/2053-1591/aaaf7b

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…This may be because the GNPs are loosely stuck to the surface of the GFRP and are reoriented thus causing the change in the initial resistance of the layer. However, this base line shifting behaviour under cyclic loading was also observed in the sensors made from multi-walled carbon nanotubes (MWCNT)/Ecoflex spray coated films [27], GNP/PMMA solution cast films [28] and screen printed silver-coated polystyrene spheres/poly dimethyl siloxane (PDMS) films [29].…”

Section: Cyclic Loadingmentioning

confidence: 76%

Piezoresistive behaviour of graphene nanoplatelet (GNP)/PMMA spray coated sensors on a polymer matrix composite beam

Sethy¹,

Sai²,

Varghese³

et al. 2019

Express Polym. Lett.

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Graphene nanoplatelet (GNP)/poly(methyl methacrylate) (PMMA) nanocomposite solution was spray coated on a glass fibre reinforced polymer composite (GFRP) beam with different initial electrical resistance (R 0 ). Scotch tape erosion method was used to tailor the R 0 of the sensors. Beams and the sensors were characterized by computed tomography (CT) and scanning electron microscopy (SEM) respectively. The piezoresistive behaviour of these sensors was evaluated in monotonic, step and cyclic loading conditions. These spray coated sensors offered good sensitivity (38.5 times) as compared to a strain gauge. A gauge factor (GF) of 55±0.5, 70±2, and 77±1 was obtained for R 0 of 1, 7 and 21 kΩ GNP layers, respectively. Sensors showed good response and stability under the step and cyclic loading conditions. The ease in the process of application coupled with good sensitivity demonstrates that the GNP/PMMA spray coated sensor can be a potential candidate for the futuristic multi-functional materials for structural health monitoring.

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Section: Cyclic Loadingmentioning

confidence: 76%

Piezoresistive behaviour of graphene nanoplatelet (GNP)/PMMA spray coated sensors on a polymer matrix composite beam

Sethy¹,

Sai²,

Varghese³

et al. 2019

Express Polym. Lett.

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“…Although graphene papers have shown outstanding physical properties, excessive applied strain over a critical point can cause morphological changes in the layered structures, such as buckling, delamination, and cracks. , Those mechanical failure modes may deteriorate the structural stability and reliability of paper-based devices such as flexible and stretchable supercapacitors and strain sensors. However, the conventional mechanical properties, including the Young’s modulus and fracture strength, are insufficient to analyze the mechanical stability and integrity; because graphene papers consist of well-stacked graphene flakes, layer-to-layer interactions need to be investigated to better understand their mechanical behaviors.…”

Section: Introductionmentioning

confidence: 99%

Tunable Interlayer Interactions in Reduced Graphene Oxide Paper

Nguyen

Megra

Lim

et al. 2023

ACS Appl. Mater. Interfaces

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Free-standing graphene-based paper-like materials have garnered significant interest for various applications because of their tunable physical and chemical properties, along with unique multilayered structures. Because of the layered configuration of graphene paper, characterization of the interactions between graphene sheets is critical for understanding its fundamental properties and applications. We investigate the interlayer cohesion energies in graphene papers using the mode I fracture concept with double cantilever beam specimens. Mechanical separation along the middle of the graphene paper thickness enables the evaluation of interlayer bonding strength in the paper. Starting from graphene oxide paper, the chemical reduction using hydroiodic acid tunes the interlayer cohesion energy from 11.30 ± 0.25 to 4.78 ± 0.18 J/m 2 as the reduction time increases. The interlayer cohesion energy is correlated with the oxygen content, interlayer spacing, and electrical conductivity of graphene papers. This work provides a fundamental characterization of the interlayer cohesion energy of graphene paper and establishes the potential for tunability of the interlayer interactions in graphene paper.

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Improved Thermal Signature of Composite Beams with GNP Smart Skin for Defect Investigation

et al. 2021

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Cyclic loading behaviour and crack monitoring potential of graphene nanoplatelet (GNP) based strain sensors in simple structures

Cited by 5 publications

References 27 publications

Piezoresistive behaviour of graphene nanoplatelet (GNP)/PMMA spray coated sensors on a polymer matrix composite beam

Piezoresistive behaviour of graphene nanoplatelet (GNP)/PMMA spray coated sensors on a polymer matrix composite beam

Tunable Interlayer Interactions in Reduced Graphene Oxide Paper

Improved Thermal Signature of Composite Beams with GNP Smart Skin for Defect Investigation

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