Advances of FRP-based smart components and structures

Chan, Yung William Sasy; Zhou, Zhi

doi:10.1016/j.pscr.2014.08.001

Cited by 13 publications

(5 citation statements)

References 27 publications

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“…As pultruded FRP profiles have a high content of fibers, it seems obvious to use these fibers to achieve additional properties in the profile. Glass fibers, for example, can be used as fiber optic sensors [4][5][6] to transmit information. Another approach to functionalizing pultrusion profiles is the use of hybrid design methods.…”

Section: Introductionmentioning

confidence: 99%

Individual functionalization of fiber-reinforced profiles via pultrusion

Drebenstedt

Knobloch

Löpitz

et al. 2022

TLS

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Profile-based design is widely used because of its flexibility. A good possibility to increase the lightweight aspect can be the use of fiber reinforced profiles. These can be produced in a series suitable process - pultrusion. In this paper, the integration of functions in pultrusion profiles is focused. In one project, potential sensor concepts for robust condition monitoring of fiber reinforced plastic (FRP) profiles were developed to expand the range of applications significantly. One application could be the substitution of complex aluminum profiles by fiber reinforced profiles with the advantage like high lightweight potential and low thermal expansion. Another objective was the integration of sensors and light-emitting diodes (LED) directly into the pultrusion profile. The objective of a second research project was the integration, wiring and test of sensors into a curved roller ski profile to detect loads during training. Several types of sensors were investigated to evaluate the parameters accuracy, positioning, and wiring at the best economic efficiency. The focus of the research and development of both projects was the integration of functions into pultruded profiles made of FRP. Successfully integrated functionalizing elements include sensors for strain, lighting elements, and touch sensors as well as temperature and humidity modules. The objective of the research project “SmartSensSki” was the integration, wiring and test of sensors into a curved roller ski profile to detect loads during training. Several types of sensors were investigated to evaluate the parameters accuracy, positioning, and wiring at the best economic efficiency. The focus of the research and development of both projects was the integration of functions into pultruded profiles made of FRP. Successfully integrated functionalizing elements include sensors for strain, lighting elements, and touch sensors as well as temperature and humidity modules.

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Section: Introductionmentioning

confidence: 99%

Individual functionalization of fiber-reinforced profiles via pultrusion

Drebenstedt

Knobloch

Löpitz

et al. 2022

TLS

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“…The introduction of new technologies to the industry should always be accompanied by detailed laboratory research and preferably by verifying the behaviour of real structure operated in in situ conditions. Therefore, there is a strong need to generate new measurement solutions that provide as much comprehensive and reliable information as possible—along with simultaneous financial feasibility [ 5 ]. This criterion, particularly in reference to linear structures such as pipelines, is currently met by the distributed fibre optic sensing technology [ 9 , 10 ], as it allows for measurements of strains [ 11 ], displacements (shapes) [ 12 , 13 ], as well as temperatures [ 14 ] over the entire length of the optical fibre sensor [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

“…New composite materials with very good mechanical parameters and the use of prefabrication advantages will find wider and wider application in civil engineering and geotechnics [2][3][4]. Such materials include GFRP (Glass Fiber Reinforced Plastic) composites, which due to their low self-weight, high strength [5], resistance to corrosion, resistance to harsh environmental conditions [6,7] and, in particular, very high durability and long-term performance, find increasingly broad application in many areas of engineering [4,8].…”

Section: Introductionmentioning

confidence: 99%

Distributed Fibre Optic Sensing (DFOS) for Deformation Assessment of Composite Collectors and Pipelines

Bednarz

Popielski

Sieńko

et al. 2021

Sensors

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Due to the low costs of distributed optical fibre sensors (DFOS) and the possibility of their direct integration within layered composite members, DFOS technology has considerable potential in structural health monitoring of linear underground infrastructures. Often, it is challenging to truly simulate the actual ground conditions at all construction stages. Thus, reliable measurements are required to adjust the model and verify theoretical calculations. The article presents a new approach to monitor displacements and strains in Glass Fiber Reinforced Polymer (GFRP) collectors and pipelines using DFOS. The research verifies the effectiveness of the proposed monitoring solution for health monitoring of composite pipelines. Optical fibres were installed over the circumference of a composite tubular pipe, both on the internal and external surfaces, while loaded externally. Analysis of strain profiles allowed for calculating the actual displacements (shape) of the pipe within its cross-section plane using the Trapezoidal method. The accuracy of proposed approach was positively verified both with reference spot displacement transducer as well as numerical simulations using finite element method (FEM). DFOS could obtain a comprehensive view of structural deformations, including both strains and displacements under externally applied load. The knowledge gained during research will be ultimately used for renovating existing collectors.

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“…In this regard, if the FBG sensor is properly coupled to the FRP reinforcement and used for real-time monitoring, the reinforcement effect can be checked at all times, thus ensuring the efficient maintenance of the structural member after reinforcement [10][11][12][13][14][15]. The application of the FBG sensor to the FRP has been mostly used to monitor the stress losses of the FRP in Reinforced Concrete (RC) beams using prestressed FRP plates [16,17]. In addition, a technology that combines the FBG sensor with the sheet or bar type of reinforcement materials has been developed to continuously monitor the reinforcing effect of the FRP used in strengthening reinforced concrete members [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Installation Technique of Fiber Optic Sensor into FRP Used as NSM Structural Strengthening System

et al. 2020

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Recently, it has become necessary to develop a monitoring technology that combines an FBG (fiber Bragg grating) sensor as a means for continuously monitoring whether the reinforcing effect of an FRP (fiber-reinforced polymer) is maintained on FRP-reinforced structural members. However, most existing research focuses on the insertion of FBG sensors into bar-shaped FRPs, and there is a lack of studies that analyze the details for an FRP strip combined with FBG sensors. In this regard, this paper seeks to develop a reinforcement for an NSM (near-surface-mounted) retrofit in which an optical fiber with an FBG sensor is combined with FRP strips. For this, a series of experiments were performed to find the adhesive strength of optical fiber-epoxy-FRP interfaces, the tensile strength of the FBG sensor part of optical fiber with a reflection lattice, and the sensing performance depending on the adhesion length between the optical fiber and the FRP strips. As a result of the study, the adhesion length not less than 20 mm in one direction from the center, with a total adhesion length of 40 mm, needs to be secured when the optical fiber with an FBG is attached and fixed between the two FRP strips with epoxy. In addition, it is expected that the proposed model can be used to properly predict the strain transfer of an FRP strip with a fiber optic sensor and can also be utilized when determining optimum dimensions.

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Advances of FRP-based smart components and structures

Cited by 13 publications

References 27 publications

Individual functionalization of fiber-reinforced profiles via pultrusion

Individual functionalization of fiber-reinforced profiles via pultrusion

Distributed Fibre Optic Sensing (DFOS) for Deformation Assessment of Composite Collectors and Pipelines

Installation Technique of Fiber Optic Sensor into FRP Used as NSM Structural Strengthening System

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