Electromagnetic absorption and thermoelastic analysis of a functionally graded wave absorber
Multidiscipline Modeling in Materials and Structures
ISSN: 1573-6105
Article publication date: 10 October 2016
Abstract
Purpose
As a good absorbing material candidate, a functionally graded wave absorber can be tailored to satisfy the impedance match principle by gradually changing material property. The paper aims to discuss these issues.
Design/methodology/approach
The electromagnetic wave absorption properties are discussed. An analysis model is proposed to provide an insight into its mechanical characteristics during wave absorption. Considering the energy-converting and thermal deformation properties, the thermoelastic behaviors of an absorber are analyzed by numerical method. The effects of material and geometrical properties are discussed in detail.
Findings
The results demonstrate that absorbing effect of graded composite is enhanced. Good performance of low reflectance and high absorption with gentle thermal stress distribution can be obtained by proper designing of the gradient absorber.
Originality/value
Functionally graded materials exhibit a progressive compositional gradient change along certain dimension of structures, which can be used as absorbing materials for the gradual change of material property tailored to satisfy the principle of impedance match. The design of functionally graded absorbing materials usually should consider not only the electromagnetic performance, but also the mechanical properties simultaneously. Therefore, few investigations have addressed the mechanical characteristics of absorbers. This paper presents some studies on the electromagnetic, especially mechanical behaviors during electromagnetic wave absorption. It is helpful to provide mechanical reference for designing an absorber.
Keywords
Acknowledgements
Supported by Hebei Province Department of Education Found (Grant No. QN2014111), National Science Foundation of Hebei Province (Grant No. A2016202195), Open Project of Key Laboratory of Special function Materials and Structure Design of Lanzhou University, Scientific Research Key Project of Hebei Education Department (Grant No. ZD20131019).
Citation
Tian, H., Sang, J., Ao, R. and Hou, S. (2016), "Electromagnetic absorption and thermoelastic analysis of a functionally graded wave absorber", Multidiscipline Modeling in Materials and Structures, Vol. 12 No. 3, pp. 534-542. https://doi.org/10.1108/MMMS-11-2015-0068
Publisher
:Emerald Group Publishing Limited
Copyright © 2016, Emerald Group Publishing Limited