Embedded Co-cured High Damping and Electromagnetic Absorbing Composite

doi:10.11901/1005.3093.2019.359

Chinese Journal of Materials Research

2020, Vol. 34

Issue (1): 64-72 DOI: 10.11901/1005.3093.2019.359

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Embedded Co-cured High Damping and Electromagnetic Absorbing Composite

CHEN Xinle,LIANG Sen(

),YAN Shengyu,ZHENG Changsheng,WANG Ling

School of Mechanical and Automotive Engineering, Qingdao Technological University, Qingdao 266520, China

Cite this article:

CHEN Xinle,LIANG Sen,YAN Shengyu,ZHENG Changsheng,WANG Ling. Embedded Co-cured High Damping and Electromagnetic Absorbing Composite. Chinese Journal of Materials Research, 2020, 34(1): 64-72.

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Abstract

A multi-layered electromagnetic absorbing composite was proposed to have the structure composed alternately of absorbing prepreg layer and absorbing damping layer, thus the embedded co-curing composite with excellent electromagnetic absorbing property and high damping property as well as other excellent static and dynamic properties was developed. The theoretical expression of the electromagnetic reflection loss of the structure was deduced, and the absorbing performance of the structure was theoretically analyzed by using MATLAB program based on the theoretical expression. The electromagnetic absorbing test verified the validity of the theoretical results. Modal test, free decay test and interlinear shear test obtained the variation curve of modal parameters, damping performance and interlamellar shear performance with the content of electromagnetic absorbing material. The experimental data show that with the increase of the content of electromagnetic absorbing materials in the composite, of which the reflection loss and the modal natural frequency decrease, the electromagnetic absorption bandwidth, the modal damping ratio and the damping loss factor increase, whereas, the interlamellar shear stress enhances.

Key words: composite absorbing properties modal parameters damping loss factor interlamellar shear

Received: 18 July 2019

ZTFLH:

V258

Fund: National Natural Science Foundation of China(51375248);National Natural Science Foundation of Shandong Province(ZR2019MEE08)

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	Xinle CHEN
	Sen LIANG
	Shengyu YAN
	Changsheng ZHENG
	Ling WANG

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https://www.cjmr.org/EN/10.11901/1005.3093.2019.359 OR https://www.cjmr.org/EN/Y2020/V34/I1/64

Fig.1 Structure of damping absorbing composite

Table 1 Ingredient of specimen1 (mass fraction, %)

Table 2 Ingredient of specimen 2 (mass fraction, %)

Table 3 Ingredient of specimen 3 (mass fraction, %)

Table 4 Ingredient of specimen 4 (mass fraction, %)

Table 5 Ingredient of specimen 5 (mass fraction, %)

Table 6 Ingredient of specimen 6 (mass fraction, %)

Table 7 Ingredient of viscoelastic damping material (mass fraction, %)

Fig.2 Co-curing process curve

Fig.3 The plates of ECDEAC

Fig.4 Absorbing test system

Fig.5 Modal test system

Fig.6 Shear test piece size and test system

Fig.7 Reflection loss of theoretical curves

Fig.8 Reflection loss of test curves

Table 8 Modal test result

Fig.9 Modal parameter change diagram

Table 9 Damping loss factor of different specimens

Fig.10 Variation curves of damping loss factor

Table 10 Interlaminar shear force of different Specimens

Fig.11 Shear force variation curves

Fig.12 Interlaminar shear stress variation curves

Fig.13 Sectional microscopic SEM image of absorbing damping layer

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