Influence of Fiber Volume Content on Thermal Conductivity in Transverse and Fiber Direction of Carbon Fiber-Reinforced Epoxy Laminates

Bard, Simon; Schönl, Florian; Demleitner, Martin; Altstädt, Volker

doi:10.3390/ma12071084

Cited by 37 publications

(24 citation statements)

References 17 publications

(34 reference statements)

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“…The method was successfully verified and tested in comparison to the determination of the fiber volume content via density measurements [26].…”

Section: Production and Characterization Methodsmentioning

confidence: 99%

Copper and Nickel Coating of Carbon Fiber for Thermally and Electrically Conductive Fiber Reinforced Composites

Bard¹,

Schönl²,

Demleitner³

et al. 2019

Polymers

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In this paper, the thermal and electrical conductivity and mechanical properties of fiber reinforced composites produced from nickel- and copper-coated carbon fibers compared to uncoated fibers are presented. The carbon fibers were processed by our prepreg line and cured to laminates. In the fiber direction, the thermal conductivity doubled from ~3 W/mK for the uncoated fiber, to ~6 W/mK for the nickel, and increased six times to ~20 W/mK for the copper-coated fiber for a fiber volume content of ~50 vol %. Transverse to the fiber, the thermal conductivity increased from 0.6 W/mK (uncoated fiber) to 0.9 W/mK (nickel) and 2.9 W/mK (copper) at the same fiber content. In addition, the electrical conductivity could be enhanced to up to ~1500 S/m with the use of the nickel-coated fiber. We showed that the flexural strength and modulus were in the range of the uncoated fibers, which offers the possibility to use them for lightning strike protection, for heatsinks in electronics or other structural heat transfer elements.

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“…The method was successfully verified and tested in comparison to the determination of the fiber volume content via density measurements [26].…”

Section: Production and Characterization Methodsmentioning

confidence: 99%

Copper and Nickel Coating of Carbon Fiber for Thermally and Electrically Conductive Fiber Reinforced Composites

Bard¹,

Schönl²,

Demleitner³

et al. 2019

Polymers

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“…The thermal conductivity of the produced hybrid composite material is calculated using Fourier's law of heat conduction as in (1).…”

Section: Numerical Approximationmentioning

confidence: 99%

“…The influence of material characteristics on thermal conductivity of composite materials are highlighted. A strong influence between carbon fiber volume concentration and thermal conductivity was determined, in which the correlation was exponential for transverse thermal conductivity and linear along the fiber direction [1]. Thermal conductivity of hemp fiber reinforced polymer composite was compared between two theoretical models and an experimental results.…”

Section: Introductionmentioning

confidence: 99%

Influence of Thermal Conductivity on Stacking Sequence of Hybrid Composites

Ramesh*¹,

Anand²

2019

IJITEE

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Hybrid Composites comprising of two or more reinforcement materials are finding increase in demand in diverse field of applications such as building panels, automotive components and aero parts. There is a need to study the thermal properties to find the suitability of hybrid laminates as insulating materials. In this research article an attempt is made to find the thermal conductivity of laminate materials having varying stacking sequence of its reinforcement fibers. The said laminate is produced using hand layup method. It contain seven layers of reinforcement fibers stacked one over other in three different configurations. First the reinforcements kevlar (K49) and basalt fibers are stacked in alternating layers. Second configuration contain bilayers of kevlar or basalt sandwiching the inner three alternative layers. Third configuration contain tri layer of one of the reinforcement fibers sandwiched between bilayers of another reinforcement fibers. Epoxy resin is used as binding cum matrix element in all the hybrid laminates. The produced hybrid laminates are tested for its thermal conductivity and coefficient of thermal expansion. It is found that increasing the number of layers of basalt fibers increased the thermal conductivity of the hybrid laminate. On the other hand, kevlar fibers contributed in reducing the thermal conductivity of the hybrid laminates. Thermal expansion coefficient depended on the presence of basalt fibers as the outermost layers in the hybrid laminates. The hybrid laminates having kevlar fibers contributed in lowering thermal conductivity and also the coefficient of thermal expansion.

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“…Carbon-fiber-reinforced plastic (CFRP) can be used as an excellent lightweight replacement for steel in mechanical industries [ 1 , 2 , 3 , 4 , 5 ] due to its outstanding specific strength characteristics [ 6 , 7 , 8 , 9 , 10 , 11 ], as well as its sound damping characteristics [ 12 , 13 , 14 , 15 , 16 , 17 ]. The dynamic response of a CFRP structure varies with the changes in structural stiffness with respect to the direction of the carbon fiber; hence, CFRP is anisotropic in nature due to the different orientations of the carbon fiber [ 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. In addition, there are several weaving processes for producing CFRP products, such as plain-weave, twill-weave, and unidirectional-weave, to create a three-dimensional structure; sometimes, a combination of different weaving methods is utilized [ 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Dynamic Characteristics of Carbon-Fiber-Reinforced Plastic for Different Spectral Loading Patterns

Kim¹

2020

Materials

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The dynamic properties of carbon-fiber-reinforced plastic (CFRP) can be efficiently estimated through a modal damping coefficient and a resonance frequency, and the modal parameters can be calculated using a frequency response function (FRF). The modal parameters used in an CFRP FRF are influenced by the carbon fiber direction, temperature, and spectral loading pattern, as well as the operating conditions. In this study, three parameters—temperature, spectral loading pattern, and carbon fiber direction—were selected as the influential factors for CFRP dynamics, and the sensitivity index formulation was derived from the parameter-dependent FRF of the CFRP structure. The derivatives of the parameter-dependent FRF over the three considered parameters were calculated from the measured modal parameters, and the dynamic sensitivity of the CFRP specimens was explored from the sensitivity index results for five different directional CFRP specimens. The acceleration response of a simple CFRP specimen was obtained via a uniaxial excitation test at temperatures ranging from −8 to 105 °C for the following two spectral loading cases: harmonic and random.

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Influence of Fiber Volume Content on Thermal Conductivity in Transverse and Fiber Direction of Carbon Fiber-Reinforced Epoxy Laminates

Cited by 37 publications

References 17 publications

Copper and Nickel Coating of Carbon Fiber for Thermally and Electrically Conductive Fiber Reinforced Composites

Copper and Nickel Coating of Carbon Fiber for Thermally and Electrically Conductive Fiber Reinforced Composites

Influence of Thermal Conductivity on Stacking Sequence of Hybrid Composites

Temperature-Dependent Dynamic Characteristics of Carbon-Fiber-Reinforced Plastic for Different Spectral Loading Patterns

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