An Equivalent Modeling Method for Honeycomb Sandwich Structure Based on Orthogonal Anisotropic Solid Element
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ORIGINAL PAPER
An Equivalent Modeling Method for Honeycomb Sandwich Structure Based on Orthogonal Anisotropic Solid Element Jian Yuan1,2 · Lei Zhang1,3
· Zhanwei Huo3
Received: 26 August 2019 / Revised: 31 January 2020 / Accepted: 3 February 2020 © The Korean Society for Aeronautical & Space Sciences 2020
Abstract An equivalent modeling method for honeycomb sandwich structure is presented in this paper. Honeycomb core is regarded as an interlayer and orthogonal anisotropic solid elements are used to model it, while the panels of honeycomb sandwich structure are represented by shell elements. This method not only controls model size and ensures computational efficiency, but also solves the problem that two-dimensional model cannot represent the internal stress distribution and local deformation. Based on the orthogonal anisotropy of honeycomb and the actual cellular size, 9 independent elastic parameters of the interlayer are given, so that the physical properties of the interlayer are described completely. In the example, the displacement errors under typical static loadcases are less than 3.12% and the frequency errors of the first six orders are less than 4.07%, compared with the precise model. A modal tapping test was carried out on a payload mounting panel with honeycomb sandwich structure. By comparing the test data with the analysis data of the equivalent model, it was shown that the frequency errors of the first six orders were all within 5%, and the analysis modes were consistent with the experimental fitting modes, which further verified the validity of the equivalent method. Keywords Honeycomb sandwich structure · Equivalent modeling · Orthogonal anisotropic material · Finite element analysis · Modal tapping test
1 Introduction Honeycomb sandwich structure is a special composite material with low surface density, high specific stiffness and good fatigue resistance, which is an ideal material for lightweight design in aerospace engineering and has been widely used in modern remote sensors and satellite structures [1–4]. In the newly developed remote sensors, such as Japan’s ALOS-3 high image resolution camera, ESA’s CHEOPS space telescope, honeycomb sandwich structure was used in their main bearing structure [5, 6]. In addition, honeycomb sandwich
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Lei Zhang [email protected]
1
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Chang Guang Satellite Technology Co., LTD, Changchun 130033, Jilin, China
structure is also widely used in payload mounting panels, solar panels and other structural parts in satellite platform. In recent years, the research on the modeling methods of honeycomb sandwich structure has been continuously deepening. Tanimoto and co-workers proposed a new modeling method for honeycomb sandwich structure, in which orthogonal anisotropic shell elements and two kinds of beam elements were used to represent the panel, bonding layer and hone
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