Journal
CARBON
Volume 177, Issue -, Pages 79-89Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2021.02.066
Keywords
Broadband microwave absorption; Metastructure; Evolutionary optimization; Mechanical-electromagnetic integration; Nano lossy composites
Funding
- National Natural Science Foundation of China [12002006]
- China Postdoctoral Science Foundation [2019M660312]
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A glass fiber/carbon fiber reinforced honeycomb metastructure with wide absorption bandwidth and high mechanical strength was designed and fabricated, successfully integrating electromagnetic absorption and mechanical resistance.
Microwave absorbing materials are of great importance on stealth technology, electromagnetic compatibility and radiation protection. The narrow absorption bandwidth restricts its further applications. Herein, the glass fiber (GF)/carbon fiber (CF) reinforced honeycomb metastructure (HM) consisting of carbonyl iron (CI) particles, multiwall carbon nanotube (MWCNT) and epoxy resin (EP) is designed by the evolutionary optimization (EO) program based on the proposed large mutation genetic algorithms (LMGA) and fabricated by vacuum bag techniques. The HM with and without GF achieves -10dB absorption bandwidth in 2-20.37 GHz and 2.76=40 GHz respectively. Wide-angle absorption in 0 degrees-45 degrees is realized. The GF/CF reinforced HM exhibits tensile and three-point flexural strength of 80.03 MPa and 34.66 MPa respectively. The integration of electromagnetic absorption and mechanical resistance is successful with the proposed design and fabrication methodology. (c) 2021 Elsevier Ltd. All rights reserved.
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