Pulse compression and tension of Kevlar/epoxy composite under shock wave action

Mochalova, V. M.; Уткин, А. В.; Савиных, А. С.; Garkushin, G. V.

doi:10.1016/j.compstruct.2021.114309

Cited by 9 publications

(6 citation statements)

References 32 publications

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“…The shock wave disruption zone is located inside a red circle highlighted in red. The simulation results are consistent with the experimental results obtained in [9]. The critical velocity for the disruption of the shock wave is the volume velocity of sound in the material.…”

Section: Estimatedsupporting

confidence: 89%

“…Besides, researchers have identified new ones. For example, experimental data on the propagation of shock waves in a composite material consisting of aramid fibers and an epoxy matrix are presented in [9]. As a result of the study, the authors concluded that the impact compressibility of the material practically didn't depend on the orientation of the fibers.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of wave processes under high-speed impact on an object from CFRP

Khudorozhko

Fomina²,

Dumansky³

et al. 2023

E3S Web of Conf.

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Numerical simulation of the impact of an aluminum particle on a composite medium was carried out. Carbon fiber reinforced plastic (CFRP) laminates T300/69 were used as a research object. The behavior of CFRP was analyzed at an impact velocity of 11 km/s and an aluminum particle mass of 1 g. The composite layers were located in planes oriented perpendicular to the direction of reinforcement. The Smoothed-particle hydrodynamics (SPH) method in conjunction with Ansys Autodyn was used for numerical modeling. Since large deformations and fracture of the objects were observed at such high impact velocities, which indicated a violation of the continuity of the material, that makes it incorrect to use of traditional mesh methods. The dependence of the shock wave propagation velocities in CFRP on time was obtained. The minimum thickness of the protective screen made of CFRP was estimated.

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Section: Estimatedsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Numerical analysis of wave processes under high-speed impact on an object from CFRP

Khudorozhko

Fomina²,

Dumansky³

et al. 2023

E3S Web of Conf.

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show abstract

“…The values of the parameters required for the above calculation are shown in Table 6. Table 6 The material parameters used in calculations Note: ρ 0 is the density of the explosive; ρ m0 is the density of Kevlar/ epoxy composite lining; a and b are the empirical constants of the lining's shock compression relation; D C is the detonation wave velocity; k 0 is a part of k, which is related to density [27].…”

Section: Discussionmentioning

confidence: 99%

Effect of surface electroplating on fragment deformation behavior subjected to contact explosion

Meng

wang

et al. 2023

Preprint

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Prefabricated fragments can deform or even fracture subjected to contact explosion. Thus, the surface of the prefabricated fragment was electroplated with Ni, in order to change the fragment deformation behavior. The effect of surface electroplating on the fragment deformation behavior under contact explosion was analyzed. Firstly, explosion recovery experiments were carried out on uncoated and coated fragments, and different lining thicknesses were set for comparison. By observing the recovered samples, the deformation behavior of two kinds of samples was found to change after contact explosion: the uncoated fragments were fractured, while the coated fragments maintained integrity. The lining did not change the fragment deformation behavior but could change the degree of deformation. As the thickness of the lining decreased, the degree of fragmentation compression increased. To study this phenomenon, detonation wave theory and shock wave transmission theory in solids were used to calculate the pressure amplitude variation at the far-exploding surface of the fragments. The pressure amplitude of the uncoated samples instantly dropped to zero after the shock wave passed through the far-exploding surface, which resulted in the formation of tensile zone. But the pressure amplitude of the coated samples increased, which transformed the tensile zone into the compression zone, thereby preventing the fracture of the fragment near the far-exploding surface, which was consistent with the test results. Then, microscopic observation of the circumferential direction of the recovered samples showed that the coatings were better than the lining in preventing "weld melting" and fracture phenomena in the radial direction of the fragments. The test results and theories show that the coating can change the deformation behavior of the fragment and prevent the fracture phenomenon of the fragment. The coating also has better protection performance than the lining against contact explosion.

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“…In engineering structures, fiber-reinforced polymers are implemented in sports equipment to navy ships, helicopters, the automotive industry, aerospace, and bridge construction. [1][2][3][4] Throughout the series of composites, fiber-reinforced polymers are the most attractive ones. [5][6][7] Although several kinds of fibers are employed in the fabrication of laminated composites, kevlar and glass fibers are extensively used due to their high uniaxial strength, impact resistance, toughness, and specific strength.…”

Section: Introductionmentioning

confidence: 99%

Development and characterization of kevlar and glass fibers reinforced epoxy/vinyl ester hybrid resin composites

Ahmad,

Shah,

Afaq

et al. 2024

Polymer Composites

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This research investigates the influence of kevlar and glass fiber reinforcements on the mechanical and thermal properties of epoxy/vinyl ester (hybrid resin) composite. The hybrid resin was synthesized by achieving an interpenetrating network between epoxy and vinyl ester. The composites were characterized using tensile, flexural, impact, and thermo‐gravimetric analysis (TGA). Scanning electron microscopy was employed to analyze surface morphology whereas Fourier‐Transformation Infrared Spectroscopy (FT‐IR) was used to investigate the possible interaction between the constituents of the composites. The findings have shown a notable improvement in the mechanical properties after the hybridization of the resin. For reference, the tensile strength of glass/hybrid resin and kevlar/hybrid resin composites were observed to increase by 8.33% and 23.65%, as compared to glass/epoxy and kevlar epoxy composites respectively, whereas, the bending strength of these composites was improved by 8.36% and 30.61%, respectively. TGA also showed an enhanced thermal stability of the hybrid resin‐based composites. Such improvements are noticed due to multi‐resin incorporation (the oxirane group of epoxy reacts with the hydroxyl group of vinyl ester), confirmed by the FTIR, TGA, and morphological analysis. This study signifies that the proposed hybrid composites are better in terms of strength and modulus relative to conventional metallic materials.Highlights The paper presents the development of novel hybrid resin, reinforced with synthetic fibers. Hybrid resin is imparted positively and is highly favorable in improving the mechanical properties of composites. The tensile strength of novel composites is increased by 8.33% and 23.65% relative to their base specimens, and a similar trend is observed in flexural and impact analysis. Fractured analysis showed that composite laminates deteriorated more intensely due to cohesive matrix fracture; adhesion failure was not observed at all, as evidenced by the emergence of micro‐cracks in resin. Developed novel composites exhibited maximum thermal stability; residual char in glass/epoxy/vinyl‐ester composite attained 17.81% higher, whereas kevlar/epoxy/vinyl‐ester achieved 3.56% relative to glass/epoxy and kevlar/epoxy base samples.

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Pulse compression and tension of Kevlar/epoxy composite under shock wave action

Cited by 9 publications

References 32 publications

Numerical analysis of wave processes under high-speed impact on an object from CFRP

Numerical analysis of wave processes under high-speed impact on an object from CFRP

Effect of surface electroplating on fragment deformation behavior subjected to contact explosion

Development and characterization of kevlar and glass fibers reinforced epoxy/vinyl ester hybrid resin composites

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