The influence of acrylate triblock copolymer embedded in matrix on composite structures’ responses to low-velocity impacts

Denneulin, Sébastien; Viot, Philippe; Léonardi, Frédéric; Lataillade, Jean-Luc

doi:10.1016/j.compstruct.2011.11.021

Cited by 31 publications

(22 citation statements)

References 17 publications

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“…For the resin with nano-reinforcements, 10 g of triblocks copolymer M52N Nanostrength Ò supplied by Arkema was added to 100 g of Epolam resin. Denneulin et al have shown from tests on Kevlar composites with three different formulations of block copolymer (M22, M42, and M52N) that 10% M52N Nanostrength Ò in the epoxy resin system provided the best performance with regard to perforation resistance [16]. Nanostrength Ò which is in powder form is added to the resin by mixing, using a mechanical stirrer at 290 rpm at 110°C for a duration of 2 h. Transmission Electronic Microscopy (TEM) was used by Denneulin et al [16] to check the self-assembling process of the block copolymer nanoparticles.…”

Section: Methodsmentioning

confidence: 99%

“…1. The manufacturing process was similar to the method explained in [16]. In the first step, each layer of Kevlar fabric cut to desired dimensions was impregnated with the resin-hardener mix manually (with a brush).…”

Section: Methods Of Fabricationmentioning

confidence: 99%

“…Denneulin et al [16] defined the energy until the initiation of the perforation, computed as the integral of the force-displacement curve up to the displacement corresponding to the peak force. This energy represents the elastic energy of the plate, the energy dissipated by matrix damage, the energy dissipated by friction and by wave propagation in the experimental setup.…”

Section: Energy Absorbedmentioning

confidence: 99%

“…The brittle nature of the epoxy matrix and its lack of resistance to crack growth is one of the limiting factors on the impact performance of the FRP sandwich structures [15]. Epoxy resins are one of the most commonly used resins because of their properties, such as thermal stability, mechanical response and low density [16]. Epoxy resins are the matrix material for glass-, Kevlar-and other fibre reinforced composites in many applications.…”

Section: Introductionmentioning

confidence: 99%

“…A systematic study on the effect of these nano reinforcements on the mechanical performance of FRPs made with these nano-modified resins, especially to impact loading, is lacking. Denneulin et al [16,22] identified the dearth of literature on composites with nano-elastomers of block copolymer and studied the influence of Nanostrength embedded in the matrix, on the low velocity impact response of Kevlar fibre reinforced composite structures. Denneulin [22] reported that while the carbon nanotubes did not have significant effect, the addition of the nanoparticles of block copolymer to the resin improved the impact resistance of the Kevlar FRP and prevented catastrophic failure due to fibre breakage and perforation seen in the sample without the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Effect of block copolymer nano-reinforcements on the low velocity impact response of sandwich structures

Ramakrishnan

Guérard

Viot

et al. 2014

Composite Structures

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tSandwich composites with fibre reinforced plastic (FRP) facesheets have emerged as a major class of lightweight structural materials in a wide range of engineering fields including aerospace, automotive and marine structures. This is due to attractive mechanical properties such as high specific stiffness and high strength. However, sandwich structures are susceptible to damage caused by impact. The objective of this paper is to evaluate the dynamic response of sandwich composites based on Kevlar fibre reinforced epoxy and Rohacell Ò foam. The improvement in impact performance of these sandwich structures that can be achieved by the addition of nanoparticles in the resin matrix is investigated. Nanostrength Ò , an acrylate triblock copolymer that self-assembles in the nanometer scale is added to the epoxy matrix. The effect of the nano-reinforcements on flat sandwich plates under low velocity impact is investigated at different scales. An instrumented drop tower setup is used for the low velocity impact tests of the sandwich plates with neat or nano-reinforced epoxy matrix, at different energies. The macroscopic response of the sandwich structure and the microscopic phenomena involved in dissipating the impact energy are identified and compared for sandwich plates with and without nanoparticles.

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Section: Methodsmentioning

confidence: 99%

Section: Methods Of Fabricationmentioning

confidence: 99%

Section: Energy Absorbedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of block copolymer nano-reinforcements on the low velocity impact response of sandwich structures

Ramakrishnan

Guérard

Viot

et al. 2014

Composite Structures

Self Cite

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The effect of boron carbide additive on the low‐velocity impact properties of low‐density foam core composite sandwich structures

et al. 2021

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Sandwich structures with carbon fiber-epoxy face sheets and polyvinyl chloride foam core material are known for their high strength and flexural stiffness despite their low weight. However, the structural response, in terms of crush strength, of the particles added sandwich structures are not very well known under impact loading conditions. In this study, the impact resistance and damage characteristics of particle added low weight composite sandwich structures were investigated with a low-velocity drop weight impact test device. Boron carbide (B 4 C) particles, which had excellent hardness, thermoelectric, and radiation absorbing characteristics, were used as an additive for the epoxy matrix. For this purpose, 2%, 5%, and 10% by weight additives were mixed into the epoxy matrix and sandwich structures were produced with hand lay-up followed by vacuum bagging method. All configurations were subjected to low-velocity drop weight impact test at three different energy levels (10, 17.50, and 25 J). The results obtained from the experiments and the images of the post-impact damage of the sandwich structures were presented comparatively. According to the test results, configurations containing 10% boron carbide (B 4 C) additive has shown the best performance in terms of resistance to impact load. K E Y W O R D S boron carbide (B 4 C) particles, carbon fiber reinforced polymer (CFRP), epoxy matrix modifying, low-density PVC foam core sandwich structures, low-velocity impact properties, radiation shielding barriers

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Effect of fiber/matrix interfacial adhesion properties on the low‐velocity impact resistance of glass fiber reinforced nylon 6 composites

Yang,

Wei,

Yin

et al. 2024

Polymer Composites

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Interfacial adhesion properties are a key factor affecting the mechanical properties of composites. It is a very effective way to improve the low‐velocity impact resistance of composites by improving the interfacial adhesion properties. To improve the fiber/matrix interfacial adhesion properties of GF/PA6 (glass‐fiber/polyamide 6) composites, polyethyleneimine (PEI) and γ‐aminopropyltriethoxysilane (KH550) were used to co‐modify GF together in this study. The GF/PA6 composites with different modifications of glass‐fiber (GF) were also prepared using a hot pressing process, and then their flexural strength, shear strength, pendulum impact strength, and low‐speed impact resistance were investigated. Next, the relationship between fiber/matrix interfacial adhesion and mechanical properties of GF/PA6 composites was investigated by combining x‐ray photoelectron spectroscopy, scanning electron microscopy, and x‐ray computed tomography test results. The results showed that the GF‐reinforced PA6 matrix composite with co‐modified GF by PEI and KH550 (PEI‐KH550‐GF/PA6) had the best mechanical properties, with flexural, shear, and pendulum impact strengths of 660.7 MPa, 53.1 MPa, and 261.6 kJ/m2, respectively. Furthermore, the low‐velocity impact resistance was measured in terms of stress peak, absorbed energy, residual stress, and damage extension, and the results showed that the low‐speed impact resistance of PEI‐KH550‐GF/PA6 composites was also substantially improved that the Fmax increased from 7402.1 to 10414.0 N.Highlights Due to the poor surface activity of GF, in this experiment, GF was co‐modified with PEI and KH550 to achieve better fiber/matrix interfacial adhesion and successfully improve the mechanical properties of the composites; Different modification methods are used to improve the interfacial adhesion of the fiber/matrix interface. The relationship between the interface and impact strength of composites has been studied; The relationship between fiber/matrix interfacial adhesion and internal cracking in composites was investigated using X‐CT and SEM and other test results.

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The influence of acrylate triblock copolymer embedded in matrix on composite structures’ responses to low-velocity impacts

Cited by 31 publications

References 17 publications

Effect of block copolymer nano-reinforcements on the low velocity impact response of sandwich structures

Effect of block copolymer nano-reinforcements on the low velocity impact response of sandwich structures

The effect of boron carbide additive on the low‐velocity impact properties of low‐density foam core composite sandwich structures

Effect of fiber/matrix interfacial adhesion properties on the low‐velocity impact resistance of glass fiber reinforced nylon 6 composites

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