Hypervelocity Impact Experiments on Epoxy/Ultra-high Molecular Weight Polyethylene Fiber Composites Reinforced with Single-walled Carbon Nanotubes

Khatiwada, Suman; Armada, Carlos A.; Barrera, Enrique V.

doi:10.1016/j.proeng.2013.05.003

Cited by 33 publications

(15 citation statements)

References 11 publications

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“…A limited number of studies have investigated the dynamic behavior of nano‐modified materials . Nanoclay has been employed in hybrid nanocomposites to enhance ballistic performance of the material .…”

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical characterization of boron nitride nanotube—epoxy nanocomposites

et al. 2018

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Quasi-static and dynamic performances of an epoxy adhesive with and without Boron nitride nanotubes (BNNTs) are studied here. This article investigates the thin film shear and bulk tensile properties of EPON 828/Epikure 3223. In addition to the neat epoxy material, specimens with 1 and 2 wt% concentrations of BNNTs were also tested. Double-lap shear tests were performed at strain rates ranging from 4.0 × 10 −4 to 3.7 × 10 3 s −1 and it was found that neither the incorporation of BNNTs nor increasing the strain rate had a substantial effect on the shear properties of the thin adhesive layer. However, bulk tensile properties were seen to be sensitive to changes in strain rate. An increase in the strain rate from 5.5 × 10 −4 to 1.2 × 10 2 s −1 increased the tensile strength and Young's modulus by 39 and 113%, respectively; while the failure strain decreased by 49%. Additionally, the BNNT-modified tensile specimens demonstrated up to 7% increase in tensile strength, up to a 16% increase in modulus, and a 9% decrease in the strain at failure. These results along with electron micrographs showed that due to pull-out and bridging mechanisms of the nano-reinforcements, the BNNTs are more effective in normal stress dominant applications, as opposed to shear stress. POLYM. COMPOS.,

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Section: Introductionmentioning

confidence: 99%

Dynamic mechanical characterization of boron nitride nanotube—epoxy nanocomposites

et al. 2018

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“…At velocities between 4 and 6 km/s, it is seen that the fabric laminate disintegrates into finer fragments. In 2013 Khatiwada et al [91] fabricated epoxy matrix composites with ultra-high molecular weight polyethylene nanoparticles and carbon nanotubes for the application of whipple shield bumper. The bumpers were tested for hypervelocity impact in the velocity range of 6.5 to 7 km/s.…”

Section: Experimental Analysis Of Whipple Shieldsmentioning

confidence: 99%

“…This configuration results in lesser chances of penetration. Another variant is a Multi-shock shield consisting of several bumpers aligned in a specific geometry to maximize the protection against impacts [8]. This review covers the use of advanced materials in construction of whipple shields, the novel configurations used to withstand hypervelocity impacts and the development in the testing methods for assessing the performance of the various designs.…”

Section: Introductionmentioning

confidence: 99%

Advances in the Whipple Shield Design and Development:

Pai

Divakaran

Anand

et al. 2021

J. dynamic behavior mater.

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Safety of satellites as well as spacecrafts during space missions is a primary objective to preserve the physical and virtual assets onboard. Whipple shields belong to the class of protective equipment provided on the surface of the spacecrafts and satellites, to sustain impacts from the ultra-high speed debris, which can otherwise cause considerable damage to the corresponding structures. Recent works on whipple shields are focussed on determining the response of different geometrical arrangements and material properties under hyper-velocity impact at projectile speeds of 3-18 km/s. Advances in the whipple shield design include integrated and mechanised models employing high performance materials like fiber-metal laminates ensuring better operational capability. The forward bumper of the whipple shield is the first line of defence as it regulates the state of projectile after the primary impact. Use of aluminium alloys for front bumpers is popular, owing to their lightweight and strength characteristics. The advances for the front bumper have seen usage of ceramic, metallic foams, and super composite mixtures, which resulted in enhanced performance, durability and safety of the whipple shields. This work is a comprehensive coverage of the latest materials used for whipple shields, their performance characterization—both experimental and theoretical, and applications.

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“…CNT has high strength, toughness, large surface area, and hollow geometry [19,20]. CNTs are reinforcement materials adding multifunctionality to a composite system as they have excellent mechanical, electrical, and optical properties along with their ability to adhere to chemical species or functional groups [21][22][23][24]. The incorporation of CNT into polymer improves their tensile strength, toughness, glass transition temperature, thermal conductivity, electrical conductivity, and optical properties [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Carbon nanotubes dispersed polymer nanocomposites: mechanical, electrical, thermal properties and surface morphology

2016

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The various properties and surface morphology of the carbon nanotubes (CNTs) dispersed polydimethyl siloxane (PDMS) matrix were studied to determine their usefulness in various applications. The tensile strength, Young's modulus and electrical breakdown strength of CNT/polymer composites were 0.35 MPa, 1.2 MPa and 8.1 kV, respectively. The thermal conductivity and dielectric constant for the material having 4.28 wt% CNT were 0.225 W m −1 K −1 and 2.329, respectively. The CNT/polymer composites are promising functional composites with improved mechanical and electrical properties. The scanning electron microscope analysis of surface morphology of PDMS/CNT composite showed that the rough surface texture on nanocomposite has large surface area with circular pores. The Fourier transform infrared spectroscopy showed the functional groups present in polymer nanocomposite.

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Hypervelocity Impact Experiments on Epoxy/Ultra-high Molecular Weight Polyethylene Fiber Composites Reinforced with Single-walled Carbon Nanotubes

Cited by 33 publications

References 11 publications

Dynamic mechanical characterization of boron nitride nanotube—epoxy nanocomposites

Dynamic mechanical characterization of boron nitride nanotube—epoxy nanocomposites

Advances in the Whipple Shield Design and Development:

Carbon nanotubes dispersed polymer nanocomposites: mechanical, electrical, thermal properties and surface morphology

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