Nickel-coated glass/epoxy honeycomb sandwich composite for broadband RCS reduction

Kwak, Byeong Su; Choi, Won Ho; Noh, Yeong-Hoon; Jeong, Gi Won; Yook, Jong Gwan; Kweon, Jin‐Hwe; Nam, Young‐Woo

doi:10.1016/j.compositesb.2020.107952

Cited by 51 publications

(4 citation statements)

References 28 publications

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“…[21][22][23] Honeycomb sandwich composites are also considered promising candidates for developing microwave absorbing structures due to their high strength-to-weight ratio, and the ability of providing the desired electric and magnetic response just by changing the structure's geometry. [14,[24][25][26][27][28][29][30] Kwak et al [29] investigated the design of a radar-absorbing honeycomb sandwich composite made of layers of a honeycomb core consisting of nickel-coated glass fabric, alternated by thin layers of pristine glass fabric. Their work analyzed how the multilayer impedance matching can be adjusted by changing the thickness and number of layers of the honeycomb sandwich composite.…”

Section: Introductionmentioning

confidence: 99%

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

et al. 2023

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Polylactic acid (PLA)—based honeycomb samples with different cell sizes and thickness were prepared using the fused filament fabrication (FFF) 3D printing technology and used to build sandwiched multilayer structures consisted of the honeycomb as the core component and poly(vinylidene fluoride) (PVDF) and/or PVDF/carbon nanotube (CNT) nanocomposites as top and bottom layers. The effect of the honeycomb design (cell size and thickness) and the presence and nature of the impedance matching layer on the microwave absorbing properties of the corresponding structures was investigated in the X‐band (8.2–12.4 GHz) and Ku‐band (12.4–18 GHz). For the systems without matching layer or with neat PVDF film as the matching layer, the honeycomb with larger thickness (5 mm) and larger cell size resulted in better electromagnetic wave attenuation but narrow frequency bandwidth with RL below −10 dB. The best combination minimum RL value (−18 to −14 dB) and broad frequency bandwidth with attenuation higher than 90% (around 8 GHz) was achieved with honeycomb of 2 mm thickness sandwiched by PVDF/CNT05 as the matching layer and bottom layer constituted by PVDF/CNT1 film, regardless the cell size of the honeycomb. These results indicate the PLA honeycomb as promising candidate as component for multilayer microwave absorbing materials and open new possibilities of applications of FFF technology for designing flexible, lightweight, and low‐cost materials to be used in both civil and military industries.

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Section: Introductionmentioning

confidence: 99%

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

et al. 2023

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“…Increasing the survival chances of all types of military equipment in the military field is the desirable direction of developing radar stealth materials [1][2][3][4][5]. The methods to realize target stealth mainly include structure stealth and material stealth.…”

Section: Introductionmentioning

confidence: 99%

Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

et al. 2023

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The development of multifunctional electromagnetic wave (EMW) absorbing materials become the inevitable course for the rapid progress of military weapons and 5G smart communication technology. The construction of engineered multi-relaxation interfaces provides an effective means for materials to enhance EMW attenuation. Herein, MXene derived Ti3C2Tx/TiO2 heterogeneous interface is tailored through the in-situ anneal, where the multi-relaxation nano-interfaces are achieved. When the annealed temperature reaches 450 °C, the maximum reflection loss (RL) of Ti3C2Tx/TiO2 is -30.4 dB at 5.67 GHz due to the enhanced interfacial polarization and optimized impedance matching. More importantly, an effective reduction in the radar cross section up to -53 dBm2 was achieved by using the Ti3C2Tx/TiO2 as the octagonal patch through effective shape design. Therefore, we believe that Ti3C2Tx/TiO2 with optimized shape has a broad application prospect in the field of radar stealth and practical electromagnetic protection.

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“…The results showed that the double-layer honeycomb sandwich structured absorber has lightweight and broadband absorption characteristics and promising applications in reducing the radiation and interference of electromagnetic waves. In addition, Kwak et al 17 fabricated a honeycomb sandwich absorbing composite consisting of a two-layer honeycomb core and a three-layer composite shell using nickel-plated glass/epoxy resin. The results show that the absorption properties can be reduced in the frequency range of 2-18 GHz, the cross-sectional area of the wing-like structure can be reduced, and the material has good prospects in aerospace.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic wave absorbing and bending properties of 3D gradient structured woven composites: experiment and simulation

Yao

Zhang

Zhou

et al. 2023

Journal of Industrial Textiles

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In order to prepare 3D structural composites with electromagnetic wave absorption and load-bearing, 3D gradient structured woven fabrics were woven with basalt fiber filament yarn and carbon fiber filament yarn as raw materials on a common loom with rational design. After that, the three-dimensional gradient structured woven fabric was used as the reinforcing material, epoxy resin was used as the matrix, and carbonyl iron powder (CIP) and carbon black (CB), the electromagnetic wave absorbers, were added. In this paper, a vacuum-assisted resin transfer molding method was used to fabricate composite materials with three-dimensional structures. Finally, the experimental and simulation analysis techniques were used to analyze the absorbing and mechanical properties of the 3D gradient structured woven composites. The results show that the error value of the peak reflection loss is 10.6% in the simulation of electromagnetic wave absorption performance, and the error value of the maximum bending load is 2.37% in the simulation of mechanical performance. The theoretical simulation results and experimental results were in good agreement, which proved the validity of the electromagnetic wave absorbing model and finite element model. The experimental and simulation analyses revealed the material’s electromagnetic wave absorbing mechanism and bending damage mechanism and provided some theoretical guidance for designing 3D gradient structured woven composites with integrated load-bearing and electromagnetic wave absorbing functions.

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Nickel-coated glass/epoxy honeycomb sandwich composite for broadband RCS reduction

Cited by 51 publications

References 28 publications

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

Electromagnetic wave absorbing and bending properties of 3D gradient structured woven composites: experiment and simulation

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Nickel-coated glass/epoxy honeycomb sandwich composite for broadband RCS reduction

Cited by 51 publications

References 28 publications

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

Sandwich structures based on fused filament fabrication 3D‐printed polylactic acid honeycomb and poly(vinylidene fluoride) nanocomposites for microwave absorbing applications

Engineering multi-relaxation interfaces in Ti3C2T x for reducing wideband radar cross section

Electromagnetic wave absorbing and bending properties of 3D gradient structured woven composites: experiment and simulation

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Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section