Effect of particle size on the fracture toughness of epoxy resin filled with spherical silica

Nakamura, Yoshinobu; Yamaguchi, Midori; Okubo, Masayoshi; Matsumoto, Tsunetaka

doi:10.1016/0032-3861(92)91099-n

Cited by 126 publications

(53 citation statements)

References 30 publications

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“…These relatively high modulus and stiff particles also result in an increase in both the strength and modulus of the modified epoxy polymer. Particular effort has focused on the toughening effects of glass [24][25][26][27] and silica [28][29][30]. A number of toughening mechanisms have been reported in the literature including crack pinning [31] and crack-path deflection [32,33] in the case of micron-sized glass beads.…”

Section: Introductionmentioning

confidence: 99%

Toughened carbon fibre-reinforced polymer composites with nanoparticle-modified epoxy matrices

et al. 2016

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In the current work, the microstructure and fracture performance of carbon fibre-reinforced polymer (CFRP) composites based upon matrices of an anhydride-cured epoxy resin (formulated with a reactive diluent), and containing silica nanoparticles and/or polysiloxane core-shell rubber (CSR) nanoparticles, were investigated. Double cantilever beam tests were performed in order to determine the interlaminar fracture energy of the CFRP composites, while the single-edge-notched bend specimen was employed to evaluate the fracture energy of the bulk polymers. The fracture energy of the bulk epoxy polymers increased from 173 J/m 2 for the unmodified polymer to a maximum of 1237 J/ m 2 with the addition of 16 wt% of CSR nanoparticles. The toughening mechanisms were identified as (a) localised plastic shear yielding and (b) cavitation of the CSR particles followed by plastic void growth of the matrix. The steady-state propagation value of the interlaminar fracture energy of the CFRP composites increased with increasing nanoparticle concentration, from 1246 J/m 2 for the unmodified epoxy matrix to a maximum of 1851 J/m 2 with 4 wt% of silica nanoparticles and 8 wt% of CSR nanoparticles. Crack growth in the CFRP composites was dominated by fibre-bridging toughening mechanisms. The efficiency of the transfer of toughness from the bulk polymers to the carbon fibre composites was considered. The measured fracture energy of both bulk and composite materials decreased at a test temperature of -80°C, compared with room temperature, i.e. 20°C. Nevertheless, the toughening effects of both the silica and CSR nanoparticles on the bulk epoxy polymers and the CFRP composites, compared with the unmodified epoxy polymers, were still evident even at the lower temperature. Indeed, the toughening effect of the silica nanoparticles was greater at -80°C than at room temperature.

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Section: Introductionmentioning

confidence: 99%

Toughened carbon fibre-reinforced polymer composites with nanoparticle-modified epoxy matrices

et al. 2016

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“…Also, larger particle sizes decreased the flexural strength of the composites. Nakamura and Yamaguchi [8] reported that the fracture toughness and energy release rate of spherical-silica-particlereinforced epoxy composites improved with increasing particle size (between 6 mm and 42 mm). In other research studies [9,10], it has been reported that increasing the particle size decreased the flexural strength improved the fracture toughness of polymeric composites [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of fillers on the fracture behaviour of particulate polyester composites

Wong

Yousif

Low

et al. 2009

The Journal of Strain Analysis for Engineering Design

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In the current work, the fracture toughness of sand-particle-and wood-flakereinforced polyester composites was studied under a linear elastic fracture mechanics approach. The effects of the particulate volume fraction (0-60 vol %) were studied. Scanning electron microscopy was used to observe the damage features on the composite surface. Results showed that sand-particle-and fine-wood-flake-reinforced polymer composites exhibited better results at 40 vol % than at other particulate volume fractions. Meanwhile, coarse-wood-flake-reinforced polymer composites showed higher properties at 30 vol % than at other particulate volume fractions. Observation of the composite surface after tests showed that sand particles have poor interfacial adhesion compared with wood flakes.

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“…There has been some research into the toughening of epoxies with nano-particles such as nano-silica [13,14]. The toughening mechanism of nano-silica in epoxy has been reported to be primarily due to two effects.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous improvements in flammability and mechanical toughening of epoxy resins through nano-silica addition

Roenner

Hutheesing

Fergusson³

et al. 2017

Fire Safety Journal

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Effect of particle size on the fracture toughness of epoxy resin filled with spherical silica

Cited by 126 publications

References 30 publications

Toughened carbon fibre-reinforced polymer composites with nanoparticle-modified epoxy matrices

Toughened carbon fibre-reinforced polymer composites with nanoparticle-modified epoxy matrices

Effects of fillers on the fracture behaviour of particulate polyester composites

Simultaneous improvements in flammability and mechanical toughening of epoxy resins through nano-silica addition

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