Properties and mechanisms of self-sensing carbon nanofibers/epoxy composites for structural health monitoring

Wang, Yanlei; Wang, Yongshuai; Wan, Baolin; Han, Baoguo; Cai, Gaochuang; Li, Zhizheng

doi:10.1016/j.compstruct.2018.05.151

Cited by 85 publications

(26 citation statements)

References 41 publications

(57 reference statements)

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“…Therefore, it is desirable to explore alternative corrosion protection for steel tube. Fibre reinforced polymer (FRP) has been widely applied in civil engineering due to its high strength, light weight, good fatigue resistance, and especially excellent durability [10][11][12][13][14][15][16][17]. FRP confined concrete (FCC) column (Fig.…”

Section: Monotonic Axial Compressive Behaviour and Confinementmentioning

confidence: 99%

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Monotonic axial compressive behaviour and confinement mechanism of square CFRP-steel tube confined concrete

Wang

Cai

Larbi

et al. 2020

Engineering Structures

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Steel tube confined concrete (STCC) is widely used in the vertical members of high-rise buildings such as columns. The axial load is not directly resisted by the steel tube in STCC, but is resisted via the interfacial frictional stress between steel tube and concrete core, which is different with that of concrete filled steel tube (CFT) members and would effectively suppress the outward local buckling of steel tube at early stage. Recently, fibre-reinforced polymer (FRP) confined STCC presents a potential to enhance the ductility and durability of such vertical elements. This paper presents an experimental study on monotonic axial compressive behaviour of carbon FRP (CFRP) confined STCC (CFRP-STCC) stub column and an analytical study on the confinement mechanism of and the ultimate axial bearing capacity of the elements. A three-stage confinement mechanism involving the different contributions of the steel tube and the CFRP wrap in CFRP-STCC elements was proposed based on the test results. A prediction model of the ultimate axial bearing capacity of CFRP-STCC stub columns was developed subsequently. Results show that the presence of CFRP wrap enhances effectively the load-bearing capacity and the ductility of steel tube confined plain concrete and reinforced concrete elements, and significantly prevents the local buckling of the steel tubes in the elements. The proposed prediction model of ultimate axial bearing capacity assesses test results with a great agreement.

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Section: Monotonic Axial Compressive Behaviour and Confinementmentioning

confidence: 99%

“…( 2.254 + 7.94 , -, -2.254 ) + 1 1( , ) ] Taking Eqs. (7)and(16) into Eq. (5), the axial bearing capacities of steel tube confined concrete stub columns and FRP-steel tube confined concrete stub columns are expressed as 254 ) + 1 1( , ) ] +Fig.…”

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confidence: 99%

Monotonic axial compressive behaviour and confinement mechanism of square CFRP-steel tube confined concrete

Wang

Cai

Larbi

et al. 2020

Engineering Structures

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“…In consideration of environmental protection and sustainable development, natural fibers have attracted the attention of many researchers as substitutable reinforcements for traditional synthetic fibers due to their advantages such as low cost, high specific strength, environmental friendliness and bio-degradability, ease of fabrication, and good structural rigidity [31][32][33]. Dittenber and Gangarao [34] compared over 20 common natural fibers (e.g., sisal, ramie, kenaf, jute, hemp, flax, coir, cotton, etc.)…”

Section: Introductionmentioning

confidence: 99%

Compressive Behavior of Circular Sawdust-Reinforced Ice-Filled Flax FRP Tubular Short Columns

et al. 2020

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Sawdust-reinforced ice-filled flax fiber-reinforced polymer (FRP) tubular (SIFFT) columns are newly proposed to be used as structural components in cold areas. A SIFFT column is composed of an external flax FRP tube filled with sawdust-reinforced ice. The compressive behavior of circular SIFFT short columns was systematically investigated. Four types of short columns with circular sections, including three plain ice specimens, three sawdust-reinforced ice specimens (a mixture of 14% sawdust and 86% ice in weight), nine plain ice-filled flax FRP tubular (PIFFT) specimens and nine SIFFT specimens, were tested to assess the concept of the innovative composite columns. The test variables were the thickness of flax FRP tubes and the type of ice cores. The test results indicated that the lateral dilation and the development of cracks of the ice cores were effectively suppressed by outer flax FRP tubes, thus causing a considerable enhancement in the compressive strength. Moreover, the compressive behavior, energy-absorption capacity, and anti-melting property of sawdust-reinforced ice cores were better than those of plain ice cores confined by flax FRP tubes with the same thicknesses. The proposed equations for estimating ultimate bearing capacities of PIFFT and SIFFT short columns were shown to provide reasonable and accurate predictions.

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“…Another approach of localizing material damage is the use of printed conductive paths [11,12] or CNT-filled coatings [13] which are deposited on the top of a composite. Furthermore, due to the incorporated piezoresistive effect by filling the whole polymer matrix with electrically conductive fillers such as CNT [14], carbon nano fibres (CNF) [15,16], and graphene nanoplatelets (GNP) [17,18], an analysis of mechanical stresses in parts is also possible.…”

Section: Introductionmentioning

confidence: 99%

In-Line Nanostructuring of Glass Fibres Using Different Carbon Allotropes for Structural Health Monitoring Application

Müller

Eichhorn

Gohs

et al. 2019

Fibers

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By the in-line nanostructuring of glass fibres (GF) during the glass fibre melt spinning process, the authors achieve an electro-mechanical-response-sensor. The glass fibre interphase was functionalized with different highly electrically conductive carbon allotropes such as carbon nanotubes, graphene nanoplatelets, or conductive carbon black. On-line structural health monitoring is demonstrated in continuous glass fibre-reinforced polypropylene composites during a static or dynamic three-point bending test. The different carbon fillers exhibit qualitative differences in their signal quality and sensitivity due to the differences in the aspect ratio of the nanoparticles, the film homogeneity, and the associated electrically conductive network density in the interphase. The occurrence of irreversible signal changes during dynamic loading may be attributed to filler reorientation processes caused by polymer creeping or to the destruction of the electrically conductive paths due to the presence of cracks in the glass fibre interphase. Further, the authors found that sensor embedding hardly influences the tensile properties of continuous GF reinforced polypropylene (PP) composite.

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Properties and mechanisms of self-sensing carbon nanofibers/epoxy composites for structural health monitoring

Abstract: This paper is NOT THE PUBLISHED VERSION; but the author's final, peer-reviewed manuscript. The published version may be accessed by following the link in th citation below.

Cited by 85 publications

References 41 publications

Monotonic axial compressive behaviour and confinement mechanism of square CFRP-steel tube confined concrete

Monotonic axial compressive behaviour and confinement mechanism of square CFRP-steel tube confined concrete

Compressive Behavior of Circular Sawdust-Reinforced Ice-Filled Flax FRP Tubular Short Columns

In-Line Nanostructuring of Glass Fibres Using Different Carbon Allotropes for Structural Health Monitoring Application

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