Hybrid nanocomposites for mid-range ballistic protection

Ávila, Antônio F.; Neto, Almir Silva; Nascimento, Hermano

doi:10.1016/j.ijimpeng.2011.03.002

Cited by 55 publications

(36 citation statements)

References 24 publications

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“…The two hybrid nanocomposites studied were fibre glass/epoxy/nanoclay and fibre glass/epoxy/nanographite. [2] As a considerable work, ion implantation and irradiation of graphene using the ion bombardment process, for understanding the material's behaviour in irradiative environment was investigated and it is found that larger incident angles are desired for substitution and single vacancy, whereas smaller incident angles are favoured for forming double vacancies, multiple vacancies, and in-plane disorder. [3] The bombardment of a suspended monolayer graphene sheet via different energetic atoms via classical molecular dynamics based on the reactive force field was studied.…”

Section: Introductionmentioning

confidence: 99%

On the oblique collision of gaseous molecules with graphene nanosheets

Sadeghzadeh

2016

Molecular Simulation

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In this paper, normal and tangential coefficients of restitution for gaseous molecules colliding with layerwise (single and few layers) graphene nanosheets were calculated using non-equilibrium molecular dynamics method. The normal and tangential coefficients of restitution depend on impact angle, velocity and landing position of projectiles. These parameters were evaluated computationally by implementation of several operations. Some differences were observed between proposed problem and macro-scale nature. The most notable difference was proportionality between the restitution coefficients and impact velocity, while in the case of macro-scale systems, they have inverse relation. Number of layers of graphene substrate does not contribute significantly to the normal and tangential coefficients of restitution. On the other hand, except for hydrogen, where its normal coefficient of restitution is approximately unity, the normal coefficient of restitution for other gasses increases as impact angle increases. Furthermore, tangential coefficients of restitution reduce with impact angle. These results can offer additional insights for further understanding the impact mechanisms and bombardment-related phenomena in lowdimensional materials. Presented results could be utilised to optimise some applied operations such as porosity generation via bombardment of layered nanostructures, gas detection process, thermal management and pressure sensor applications.

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Section: Introductionmentioning

confidence: 99%

On the oblique collision of gaseous molecules with graphene nanosheets

Sadeghzadeh

2016

Molecular Simulation

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“…Gopinath pointed out that the matrix had significant influences on ballistic performance . Several matrixes were developed to manufacture ballistic composites, such as epoxy resin , styrene‐ethylene‐butylene‐styrene (SEBS) , polypropylene (PP) and other thermoplastics . The poly(vinyl butyral)/phenol formaldehyde (PVB/PF) system is a typical resin system used in ballistic helmets.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal aging on microstructures of aramid composites

Huang²,

Li³

et al. 2015

Polymer Composites

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The effect of thermal aging on aramid composites was assessed in this study. Poly(vinyl butyral)/phenol formaldehyde (PVB/PF) resin was used to prepare the aramid composites, which were programmed at 70, 90, 120, and 150°C for various periods of time up to 2,688 h. The microstructures and aging mechanisms were investigated by dynamical mechanical thermal analysis, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Ballistic limited velocity of composites was determined by 1.1g Fragment projectiles. The results suggest that three microphases exist in the PVB/PF system. Each phase exhibits different aging mechanisms at different aging temperatures. Reduction of ballistic limited velocity was strongly affected by aging conditions. POLYM. COMPOS., 38:252–259, 2017. © 2015 Society of Plastics Engineers

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“…Avila et al (2006) studied how nano particles provide better inter phase strength which affects the damping characteristics of composites. In another work, Avila et al (2011) has proved that the addition of nanoclay and graphene nano sheets to fiberglass/epoxy laminates has not only increased the high velocity impact resistance of these composites, but it also has a major influence on their failure mechanism. Our previous studies, Balaganesan (2013) and(2014), focused on experiments and analytical model on energy absorption of nanocomposites laminates subjected to impact loading above ballistic limits.…”

Section: Introductionmentioning

confidence: 99%

Vibration and Energy Dissipation of Nanocomposite Laminates for Below Ballistic Impact Loading

Balaganesan

Ramachandran

2015

Lat. Am. j. solids struct.

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Composite laminates are made of glass woven roving mats of 610gsm, epoxy resin and nano clay which are subjected to projectile impact. Nano clay dispersion is varied from 1% to 5%. Impact tests are conducted in a gas gun setup with a spherical nose cylindrical projectile of diameter 9.5 mm of mass 7.6 g. The energy absorbed by the laminates when subjected to impact loading is studied, the velocity range is below ballistic limit. The effect of nano clay on energy absorption in vibration, delamination and matrix crack is studied for different weight % of nano clay and for different thickness values of the laminates. The natural frequencies and damping factors are obtained for the laminates during impact and the effect of nano clay is studied. The results show considerable improvement in energy absorption due to the presence of nano clay

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Hybrid nanocomposites for mid-range ballistic protection

Cited by 55 publications

References 24 publications

On the oblique collision of gaseous molecules with graphene nanosheets

On the oblique collision of gaseous molecules with graphene nanosheets

Effect of thermal aging on microstructures of aramid composites

Vibration and Energy Dissipation of Nanocomposite Laminates for Below Ballistic Impact Loading

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