基于碳纤维的层合结构双极化电磁吸波及其弯曲性能设计

纪正江; 程琳豪; 郑锡涛; 闫雷雷

doi:10.21656/1000-0887.450102

基于碳纤维的层合结构双极化电磁吸波及其弯曲性能设计

doi: 10.21656/1000-0887.450102

西北工业大学航空学院，西安 710072

基金项目:

国家自然科学基金 12372141

详细信息

作者简介:
纪正江(1998—)，男，博士生(E-mail: jzj@mail.nwpu.edu.cn)

通讯作者:
闫雷雷(1986—)，男，副教授，博士，博士生导师(通讯作者. E-mail: yanleilei@nwpu.edu.cn)

中图分类号: O342
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- 文章访问数: 141
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- PDF下载量: 33
- 被引次数: 0
出版历程
- 收稿日期: 2024-04-15
- 修回日期: 2024-06-06
- 刊出日期: 2024-08-01

Electromagnetic Wave Dual-Polarized Absorption and Flexural Performance Design of Composite Laminates Based on Carbon Fibers

School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, P.R.China

摘要

摘要: 针对现有飞行器复合材料蒙皮难以兼顾承载性能和吸波性能的问题，利用碳纤维预浸料独特的力电特性构造了碳纤维双极化吸波层合结构(carbon fiber dual-polarized absorbing laminated structure, CFDALS). 通过在玻璃纤维层合结构中引入双向碳纤维阵列结构，赋予层合结构双极化电磁波吸收特性，同时利用碳纤维反射层优异的承载性能来增强结构力学性能. 电磁仿真结果表明，该结构对TE极化电磁波在8~18 GHz频带、0°~45°入射角，同时对TM极化电磁波在5~18 GHz频带、0°~60°入射角下平均吸收率均达到90%以上. 三点弯曲仿真结果表明，结构在实现双极化电磁吸波的同时，在碳纤维阵列两个排列方向上表现出较高的比弯曲强度、比弯曲刚度. 通过在玻璃纤维预浸料中引入双向排列的碳纤维预浸料并进行一体化设计，在结构具备双向优异承载性能的同时实现了双极化电磁吸波性能的显著增强，为飞行器蒙皮隐身承载一体化设计提供了一种新的解决方案.
- 碳纤维预浸料 /
- 层合结构 /
- 双极化 /
- 电磁吸波 /
- 力学性能
Abstract: To address the challenge of balancing load-bearing and electromagnetic (EM) wave absorption properties in aircraft composite skin, the outstanding mechanical and electrical characteristics of carbon fiber (CF) prepregs were utilized to construct a carbon fiber dual-polarized absorbing laminated structure (CFDALS). The bidirectional CF arrays were introduced into the glass fiber (GF) laminated structure, to endow the laminated structure with dual-polarized EM wave absorption performances. Additionally, the excellent load-bearing capacity of the CF reflector was used to enhance the mechanical properties. Simulation results indicate that, the CFDALS achieves an average absorptivity over 90% within the 8~18 GHz frequency band at incident angles of 0°~45°, and within the 5~18 GHz band at incident angles of 0°~60° for TE and TM polarized EM waves, respectively. The 3-point bending simulation results show that, the CFDALS exhibits higher specific flexural strengths and stiffnesses along 2 directions of the CF arrays while achieving dual-polarized EM wave absorption. Incorporation of bidirectionally arranged CF prepregs into GF prepregs enhances the dual-polarized EM wave absorption performance and the bidirectional flexural performance of the CFDALS simultaneously. The work provides a novel solution for the EM wave absorbing and load-bearing integrated design for aircraft composite skin applications.
- carbon fiber prepreg /
- laminated structure /
- dual-polarized /
- electromagnetic wave absorption /
- mechanical property

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图 1 双极化结构示意图

注为了解释图中的颜色，读者可以参考本文的电子网页版本，后同.

Figure 1. Schematic diagram of CFDALS

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图 2 双极化结构与极化敏感结构的吸波性能比较(入射角θ=30°)

Figure 2. Comparison of CFDALS and PSS in EM wave absorption properties (incident angle θ=30°)

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图 3 斜入射性能对比TE波入射

Figure 3. EM wave absorption performances in oblique incidence

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图 4 碳纤维阵列排布和弯曲加载区域示意图

Figure 4. Schematic diagram of CF array distributions and bending load areas

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图 5 三点弯曲性能对比

Figure 5. Comparison of 3-point bending performances

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表 1 尺寸参数的优化结果(单位：mm)

Table 1. Optimization results of size parameters (unit: mm)

parameter	x_l₁	x_w₁	x_{d_l}	x_{d_w}	y_l₁	y_w₁	y_{d_l}	y_{d_w}
optimization range	3.0~5.0	2.5~3.0	0.5~1.0	0.5~1.0	1.0~2.0	0.3~0.6	0.4~0.6	0.3~0.4
optimization result	3.16	2.90	0.56	0.84	1.22	0.46	0.42	0.32

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表 2 材料的力学性能

Table 2. Mechanical properties of materials

mechanical property	carbon fiber prepreg	glass fiber prepreg
density ρ/(kg/m³)	1 550	1 600
longitudinal elastic modulus E₁/MPa	125 000	34 000
transverse elastic modulus E₂/MPa	12 000	10 300
Poisson’s ratio μ₁₂, μ₁₃, μ₂₃	0.28, 0.28, 0.44	0.278, 0.278, 0.38
shear modulus G₁₂/MPa，G₁₃/MPa，G₂₃/MPa	4 500, 4 500, 2 500	2 700, 2 700, 1 500
fiber tensile strength X_T/MPa	2 100	1 300
fiber compressive strength X_C/MPa	1 500	860
matrix tensile strength Y_T/MPa	180	160
matrix compressive strength Y_C/MPa	240	210
normal tensile strength Z_T/MPa	180	160
normal compressive strength Z_C/MPa	240	210
shear strength S₁₂/MPa, S₁₃/MPa, S₂₃/MPa	200, 200, 140	140, 140, 80

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表 3 Cohesive单元的力学性能

Table 3. Mechanical properties of cohesive elements

density ρ_c/(kg/m³)	modulus			strength			critical fracture energy
density ρ_c/(kg/m³)	E_n/GPa	E_s/GPa	E_T/GPa	σ_n/MPa	σ_s/MPa	σ_T/MPa	G_n^C/(J/mm²)	G_s^C/(J/mm²)	G_T^C/(J/mm²)
1 560	3	1.154	1.154	0.01	0.015	0.001	0.02	0.025	0.025

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表 4 MX结构的试验与仿真结果对比

Table 4. Comparison of experimental and simulated results of the MX structure

index	test result	simulated result	simulation error
density ρ_MX/(kg/m³)	1 451	1 591	9.6%
flexural stiffness K_MX/(N/mm)	315.48	334.34	6.0%
specific flexural stiffness K_sMX/(N/(kg/m²))	217.42	210.15	-3.3%
flexural strength S_MX/MPa	825.40	768.36	-6.9%
specific flexural strength S_sMX/(MPa/(kg/m³))	0.568 8	0.482 9	-15.1%

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表 5 双极化结构与极化敏感结构沿x，y轴弯曲性能仿真结果对比

Table 5. Comparison of flexural property simulation results of CFDALS and PPS along x and y axes

index	flexural property				improvement of CFDALS compared with PPS
index	MX	SX	MY	SY	flexural property in x axis	flexural property in y axis
density ρ/(kg/m³)	1 591	1 577	1 591	1 591	-0.2%	0
flexural stiffness K_f/(N/mm)	339.31	311.19	271.70	279.92	-8.3%	3.0%
specific flexural stiffness K_sf/(N/(kg/m²))	213.27	197.33	170.77	175.94	-7.5%	3.0%
flexural strength S_f/MPa	768.36	690.11	722.39	784.09	-10.2%	8.5%
specific flexural strength S_sf/(MPa/(kg/m³))	0.482 9	0.437 6	0.454 0	0.492 8	-9.3%	8.5%

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