Electromagnetic shielding response of magnetite elastomeric composites: Source and filler content dependence

Posada, Andrés Orlando Garzón; Téllez, D.A. Landı́nez; Roa-Rojas, J.; Barrado, José

doi:10.1016/j.jmrt.2020.07.081

Cited by 19 publications

(6 citation statements)

References 32 publications

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“…However, impedance matching is required to design a good electromagnetic shielding absorber. EMI shielding property of the magnetite is already well reported in literature [46][47][48][49][50][51] . It is considered as a good electromagnetic absorber to satisfy the impedance matching condition.…”

Section: Magnetisation and Electromagnetic Shielding Efficiencymentioning

confidence: 95%

Functionalised SiO2 modified icephobic nanocomposite electrospun membranes for outdoor electromagnetic shielding applications

Taş

Musa

Ahmed

et al. 2022

Polymer

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Section: Magnetisation and Electromagnetic Shielding Efficiencymentioning

confidence: 95%

Functionalised SiO2 modified icephobic nanocomposite electrospun membranes for outdoor electromagnetic shielding applications

Taş

Musa

Ahmed

et al. 2022

Polymer

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“…The investigation reported that the above-mentioned factors could be manipulated to achieve desirable mechanical properties. 66 Also, Garzo´n Posada et al 67 studied shielding properties of rubber composite materials in terms of structures and electromagnetic characteristics of NBR rubber filled with magnetite (Fe 3 O 4 ). The elastomeric composites were separately fabricated with ore magnetite and synthetic magnetite at various ratios, using a rubber mill.…”

Section: Other Factorsmentioning

confidence: 99%

“…The study summarized that the: (i) source of magnetite, (ii) its ratio in the matrix, and (iii) thickness of elastomeric composites were responsible for the electromagnetic behavior of the elastomeric composites. 67 Additionally, Samal et al 68 worked on magneto rheological elastomeric (MRE) composite in which iron was distributed as filler. In this work, an improvement in the engineering strength of MRE composite was obtained by varying magnetic field intensity.…”

Section: Other Factorsmentioning

confidence: 99%

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Feasibility of elastomeric composites as alternative materials for marine applications: A compendious review on their properties and opportunities

Dhandapani

Krishnasamy

Rajini

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part M:

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The term elastomer is a curtailment of two words, which are elastic and polymers. Accordingly, elastomers are polymer materials with elasticity. The significant challenges hindering the development of materials for naval applications, similar to other engineering sectors, include achieving a competitive light elastomeric structure. Marine structures are susceptible to various damage responses due to various loads throughout their service life. Being flexible, elastomer has a low modulus of elasticity, exhibits higher values of failure strain and yield strength. In these regards, elastomers are attractive materials for applications that require elasticity because they offer substantial advantages compared to traditional materials. However, the low fire resistance of these elastomeric materials jeopardizes their use in some critical applications. As a result, elastomeric blends and composites containing flame retardant (FR) additives are commonly used. On the other hand, elastomers possess (i) high strength-to-weight ratio, (ii) excellent impact properties, (iii) low infrared, magnetic, and radar signatures, (iv) excellent durability, and (v) high resilience to extreme loads. Hence, the scope of this study focuses on review and awareness regarding the feasibility of marine applications of elastomers/elastomeric composites, their current scientific and technological drawbacks, and future outlooks or prospects to support several applications in the marine industry.

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“…In the formula, E + e and E − e are the kinetic energy of the positive and negative electron pair [18,19]. In addition, according to the principle of conservation of momentum, the recoil energy of an atomic nucleus whose mass is greater than the mass of an electron can be almost negligible in the process of generating positive and negative electron pairs [20].…”

Section: Electromagnetic Occlusion Algorithmmentioning

confidence: 99%

Electromagnetic Occlusion Algorithm Based on FPGA and Panel Grouping and Its Optimization

Cao

2021

Wireless Communications and Mobile Computing

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With the development of digital signal processing and advanced algorithms, real-time signal processing based on FPGA and DSP is suitable for high-speed radar signal processing. With the rapid development of science and technology, war has entered the information age guided by high technology, and advanced science and technology has played a vital role in the trend of war. In recent years in the modern war, many countries invest a lot of research effort on the stealth technology, and advanced stealth technology can use a variety of technical means to alter or weaken the feature information of the target, confuse the enemy radar detection system effectively, reduce the chance of being detected to the largest extent, and prolong the lifecycle of aircraft and weapons. This research mainly discusses the electromagnetic occlusion algorithm and its optimization based on FPGA and panel grouping. The FPGA model selected for this study is XC6VLX240T-1FF1156I. Because the amount of data processed here is not very large, the cache part directly uses the on-chip storage resources of the FPGA, and the AD device is used to perform analog-to-digital/digital-to-analog conversion on the signal and perform digital up-down conversion. For a facet, it is necessary to first verify whether it is a bright facet and set the flag to mark it, then the facet needs to be occluded with the triangular facet marked as a bright facet, and all bright facets that have been marked need to be traversed. Open MP parallelization of the occlusion algorithm is as follows: The physical optics method is used to calculate the target RCS, and the focus of parallelism is placed on the part with a large amount of calculation. When using Open MP to design a program on a multicore computer, each group is assigned a thread to give full play to the core computing power. The total field is scattered and superimposed by each surface element. This part uses the parallel processing mode of Open MP, which allows the panel judgment in the group to be carried out at the same time. This part requires schedule to allocate resources and use different parallel mechanisms for different calculations to optimize debugging. In the angular range where there is multiple scattering at 0 ° ≤ φ ≤ 90 ° , the calculation results and the measurement results are in good agreement, and when the two planes are simulated with 1820 triangular faces, the fast multiple scattering in this paper only needs 4 minutes. This research has realized the general radar signal processing method based on FPGA structure, and the design has important engineering realization significance.

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Electromagnetic shielding response of magnetite elastomeric composites: Source and filler content dependence

Cited by 19 publications

References 32 publications

Functionalised SiO2 modified icephobic nanocomposite electrospun membranes for outdoor electromagnetic shielding applications

Functionalised SiO2 modified icephobic nanocomposite electrospun membranes for outdoor electromagnetic shielding applications

Feasibility of elastomeric composites as alternative materials for marine applications: A compendious review on their properties and opportunities

Electromagnetic Occlusion Algorithm Based on FPGA and Panel Grouping and Its Optimization

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