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Electromagnetic Wave-Absorbing and Bending Properties of Three-Dimensional Gradient Woven Composites with Triangular
Huawei Zhang1, Xinghai Zhou1, Yuan Gao1
1School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, China.
Polymers
|May 14, 2022
Summary
New three-dimensional gradient honeycomb woven composites (GHWCs) offer enhanced electromagnetic wave absorption and mechanical strength. These materials combine carbon fiber, basalt fiber, and specialized fillers for improved performance in demanding applications.
Area of Science:
- Materials Science
- Composite Materials
- Electromagnetics
Background:
- Traditional composites face challenges with integrity, delamination, and limited electromagnetic wave absorption bandwidth.
- Developing multifunctional materials with both load-bearing and electromagnetic (EM) absorbing capabilities is crucial for advanced applications.
Purpose of the Study:
- To design and prepare novel three-dimensional gradient honeycomb woven composites (GHWCs) with triangular sections.
- To investigate the electromagnetic absorbing and mechanical properties of these GHWCs.
- To elucidate the EM-absorbing mechanisms and failure modes of the developed composites.
Main Methods:
- Fabrication of 3D gradient honeycomb woven fabric using carbon fiber (CF) and basalt fiber (BF) filaments.
- Preparation of the composite matrix using epoxy resin (EP) doped with carbon black (CB) and carbonyl iron powder (CIP).
- Utilizing the Vacuum Assisted Resin Transfer Molding (VARTM) process for composite manufacturing.
- Conducting macro tests and micro characterization to analyze properties.
Main Results:
- The CF filament reflective layer significantly improved both EM-absorbing and mechanical properties.
- Incorporating CB/CIP as an absorbing agent boosted EM absorption but decreased mechanical performance.
- Increasing gradient layers enhanced maximum bending load, while EM absorption initially increased then decreased.
- Optimal performance was achieved at 15 mm thickness, yielding a maximum bending load of 3530 N and minimum reflection loss (RLmin) of -21.6 dB.
Conclusions:
- The developed 3D GHWCs exhibit a synergistic balance of EM-absorbing and mechanical properties.
- Adjusting absorber type and gradient aperture size ratio offers a viable strategy for tailoring absorption frequency and intensity.
- These composites show excellent application potential in both civil and military fields.
Keywords:
3D honeycomb gradient woven fabricCB/CIPEM wave-absorbing propertycarbon fibersmechanical propertyMore Related Videos
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