Methods of modifying through-thickness electrical conductivity of CFRP for use in structural health monitoring, and its effect on mechanical properties – A review

Brown, Sheila; Robert, Colin; Koutsos, Vasileios; Ray, Dipa

doi:10.1016/j.compositesa.2020.105885

Cited by 41 publications

(23 citation statements)

References 114 publications

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“…Even though the major part of FRP composites contains glass fiber, the exceptional properties of carbon fibers have made them more desirable in several respects. Carbon fibers (CF) have better electrical properties, thermal conductivity, higher stiffness, and higher resistance to creep and fatigue 36–40 than glass fibers. The earliest research done on composites involving carbon and glass fibers is, where a numerical calculation of the modulus for the blended composite was calculated 41 .…”

Section: Introductionmentioning

confidence: 99%

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

Dasari

Lohani

Prusty

2021

J of Applied Polymer Sci

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Utilizing recycled or short fibers for making useful engineering composite component is a present research trend and requirement. Current research work explicates the effect of short carbon fibers (SCF) used as secondary reinforcement in woven glass/epoxy hybrid composites and evaluates their mechanical properties. Different concentrations (0.1, 0.3, and 0.5 wt%) of SCF were incorporated to assess the tensile, flexural, and interlaminar fracture toughness (Mode I and II) of the resulted composites. Composites with 0.1 wt% SCF showed 29.02% and 16.08% increment in the tensile and flexural strength, respectively. For Mode I and Mode II interlaminar fracture toughness tests, 0.1 wt% SCF‐GE samples showed the highest strain energy release rate. Double cantilever beam specimens were used for Mode I testing and an improvement of 13.49% in GIC value was observed. End‐notched flexure method was used for the Mode II tests, and 0.1 wt% SCF‐GE samples showed 20.45% increase in GIIC values. This paper explains the various reasons and mechanisms for obtaining such results. Scanning electron microscopy of the fractured surfaces was carried out to perceive the diverse failure micro‐mechanisms that could have been involved.

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Section: Introductionmentioning

confidence: 99%

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

Dasari

Lohani

Prusty

2021

J of Applied Polymer Sci

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“…The limitation in conduction capability of CFRP materials caused by both the carbon fibres anisotropy and the presence of resin-reach interlaminar regions is a well-known issue. Recent research has proposed various methods of improving the electrical conductivity in CFRP [49], [66], [67]. For this particular case, the electrical contact behavior might be improved by the dispersion of conducting nanofillers within the epoxy matrix [68]- [71].…”

Section: Discussionmentioning

confidence: 99%

Estimation of Contact Resistivity in Lightning Protection Equipotential Bonding Joints of Wind Turbine Blades

Laudani

Senis

Lewin

et al. 2021

IEEE Trans. Electromagn. Compat.

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Modern lightning protection systems for wind turbine blades with conducting structural elements, e.g., carbon fibre reinforced polymer (CFRP) spar caps, contain equipotential bonding joints to prevent sparking during strikes. Significant current levels are experienced through the joints and the characterization of the electrical contact at the bonding regions is essential for reliable protection. Therefore, this article aims to characterize the contact resistivity of several equipotential bonding joints. The proposed methodology first measures the total resistance of the samples, and then the bulk resistance of the conductive elements is computed using the finite-element method. The latter is required to predict the spreading effects in CFRP components due to the strong anisotropic nature of such materials. After that, the contact resistance is calculated by subtracting the predicted bulk resistances from the measured total resistances. The developed procedure was applied to three typical equipotential bonding materials: expanded copper foil (ECF), biaxial (BIAX) CFRP and unidirectional (UD) CFRP. Both ECF and BIAX CFRP showed superior contact quality than UD CFRP, with one to two orders of magnitude smaller contact resistivity.

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“…e elastic modulus and tensile strength of CFRP at 250°C were reduced by about 28% and 42%, respectively, as compared to room temperature [53]. Moreover, CFRP exhibits electrical conductivity; thus, it cannot be used in applications requiring insulation [54,55].…”

Section: Cfrpmentioning

confidence: 99%

Review of Experimental Studies on Application of FRP for Strengthening of Bridge Structures

Yuan

2020

Advances in Materials Science and Engineering

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In recent years, fiber-reinforced polymer (FRP) composites have been widely used as a new type of high-performance material in concrete structures. FRP composites have the advantages of high strength, light weight, and corrosion resistance. Based on existing studies in the literature, this paper reviews the development and applications of FRP materials for the strengthening and rehabilitation of bridge structures. The types and properties of FRP composites are summarized, and the applications and development of FRP sheets, FRP bars, FRP grids, and prestressed FRP tendons for bridge structures are discussed. Different types of FRP composites result in different failure characteristics and bearing capacities. Moreover, this paper covers the FRP strengthening methods and the response properties of the flexural performance, bonding performance, and ductility. Significant conclusions regarding the strengthening/repair of bridge structures with FRP composites are presented. The review details the current state of knowledge and research on strengthening bridge structures with FRP composites and is helpful for better understanding and establishing design criteria.

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Methods of modifying through-thickness electrical conductivity of CFRP for use in structural health monitoring, and its effect on mechanical properties – A review

Cited by 41 publications

References 114 publications

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

An assessment of mechanical behavior of glass fiber/epoxy composites with secondary short carbon fiber reinforcements

Estimation of Contact Resistivity in Lightning Protection Equipotential Bonding Joints of Wind Turbine Blades

Review of Experimental Studies on Application of FRP for Strengthening of Bridge Structures

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