Electrical and shear constitutive response of conductive glass fibre/epoxy composites

O’Donnell, Jacob; Chalivendra, Vijaya; Hall, Asha; Haile, Mulugeta; Nataraj, Latha; Coatney, Michael; Kim, Yong

doi:10.1080/14658011.2019.1711345

Cited by 8 publications

(6 citation statements)

References 18 publications

(32 reference statements)

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“…This weight percentage is chosen based on our previous study on damage sensing in CNTs embedded glass fiber reinforced composites under quasi-static interlaminar shear loading conditions. 18 A 3 K twill woven intra-ply hybrid fabric (supplied by Composite Envisions, Wausau, WI, USA) is used for the laminates consisting of fiberglass in the warp direction and carbon fiber in the weft direction. Silver conductive paint 05001-AB (supplied by SPI supplies, West Chester, PA, USA) is used to make four circumferential ring probes.…”

Section: Methodsmentioning

confidence: 99%

In-situ damage sensing in intra-ply glass/carbon laminate composites under interlaminar shear loading

Pires

Chalivendra

2021

Journal of Composite Materials

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An experimental study is preformed to investigate the in-situ damage sensing capabilities of intra-ply hybrid carbon/glass laminate and epoxy composites under quasi-static interlaminar shear loading. A three-dimensional electrical sensory network is generated inside the composites through embedded carbon nanotubes (CNTs) in an epoxy matrix along with the carbon fibers in the intra-ply hybrid laminates. CNTs are dispersed in the epoxy matrix using a combination of ultrasonication and shear mixing techniques. Four circumferential ring probes are used to examine the electrical response under interlaminar shear load. The effect of four different intra-ply orientations (((0–90)C, where carbon fibers are oriented along the loading direction), ((0–90)G, where glass fibers are oriented along the loading direction), ((45/−45, where glass and carbon fibers are oriented at 45o/−45o and the laminates are repeated), and ((45/−45)A, where glass and carbon fibers are oriented at 45o/−45o and the laminates are alternated)) on the shear constitutive behavior and the damage detection are discussed. Intra-ply orientations of (45/−45) and (45/−45)A showed higher interlaminar shear strength and shear strain at break compared to (0/90)C and (0/90)G orientations. Out of all four orientations, (45/−45)A provided a better resolution of electrical response for damage sensing applications.

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Section: Methodsmentioning

confidence: 99%

In-situ damage sensing in intra-ply glass/carbon laminate composites under interlaminar shear loading

Pires

Chalivendra

2021

Journal of Composite Materials

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“…Once both plates are in place, a 30-80 kV voltage difference is induced between the plates. 11–15 This causes the short carbon fibers to fly up towards the glass fabric, and the applied epoxy allows the short carbon fibers to stick into the fabric approximately normal to the laminate. Typical carbon fiber flocked glass fabric is shown in Figure 1(b).…”

Section: Methodsmentioning

confidence: 99%

Damage sensing in multi-functional glass fiber composites under mode-I fracture loading

O’Donnell

Chalivendra

Hall

et al. 2020

Journal of Composite Materials

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A detailed experimental study is performed for piezo resistance damage sensing on conductive glass fiber/epoxy composites under mode-I fracture conditions. The conductive composites are fabricated by homogeneously dispersing carbon nanotubes (CNTs) within the epoxy matrix and electro-flocking short carbon fibers onto the laminates along with a vacuum infusion process. A parametric study is done on the in-situ damage sensing properties by varying the carbon fiber lengths (150 µm and 350 µm) and the carbon fiber areal densities (500, 1000, 1500, and 2000 fibers/mm2). The change in resistance is captured with a four-point probe measuring methodology by measuring the resistance through the thickness of the composite. The crack initiation toughness value of the composites containing carbon fibers showed improvement over control composites. Composites containing 350 µm length carbon fibers and 2000 fiber/mm2 not only showed the best crack initiation toughness but also provided sensitive network for detecting crack growth.

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“…14,16 As reported for CPCs, the high conductivity can be obtained by the optimal option of various resins used as matrix materials, like polypropylene (PP), styrene-butadiene-styrene triblock copolymer (SBS), polydimethylsiloxane, polyvinyl chloride, polyaniline and high-density polyethylene. 3,8,[17][18][19][20] It also depends on the selection of effective conductive filler, such as carbon black (CB), carbon nanotube, carbon fibers and graphene (GE), 19,[21][22][23][24][25] and the design of phase structure, e.g., segregated structure, double percolation structure and sandwich structure. 17,26,27 The matrix materials as the main component of CPCs play a decisive role in overall properties, and the electrical property primarily depends on the dispersion state of conductive filler, so many research reports about matrix components and the distribution of filler spring up.…”

Section: Introductionmentioning

confidence: 99%

Crystallization induced segregated structure for outstanding conductive property with low percolation threshold

Yang,

Zhou

et al. 2024

Plastics, Rubber and Composites: Macromolecular Engineering

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Conductive polymer composites (CPCs) are promising alternatives to metal conductive materials due to their light-weight and low-cost. This work investigates the effect of the crystallization behavior of the matrix on the electrical property of CPCs, where semi-crystalline polypropylene (PP) and amorphous styrene-butadiene-styrene tri-block copolymer (SBS) are selected as a matrix, respectively, and conductive carbon black (CB) particles are introduced into matrixes by melting blending. Based on the electrical properties of CPCs with various CB contents and percolation theory, the percolation threshold of 1.8 vol% in PP matrix composites is obtained, much lower than that of SBS matrix composites (5.4 vol%). The analysis with a polarizing microscope and differential scanning calorimeter confirms that such a significant difference in percolation threshold between two composites is due to the crystallization behavior while the crystallization induced segregated structure is proposed. Finally, the rheology behaviors and mechanical properties are characterized for microstructures and applications, respectively.

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Electrical and shear constitutive response of conductive glass fibre/epoxy composites

Cited by 8 publications

References 18 publications

In-situ damage sensing in intra-ply glass/carbon laminate composites under interlaminar shear loading

In-situ damage sensing in intra-ply glass/carbon laminate composites under interlaminar shear loading

Damage sensing in multi-functional glass fiber composites under mode-I fracture loading

Crystallization induced segregated structure for outstanding conductive property with low percolation threshold

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