DataVXJournal of Sandwich Structures & MaterialsPaper
journal article·2023-06

A homogenization method for natural frequencies and damping analysis of composite pyramidal lattice truss sandwich structures based on representative volume elements

Chengyu Guan, Zi-Jia Tang, Fei Zhao, Zhiyong Yang, Huimin Li

Journal of Sandwich Structures & Materials· Volume 25· Issue 5
Publisher page
Source abstract

Abstract

A homogenization method for the vibration analysis of periodic sandwich panels is presented. Periodic boundary conditions are applied to a representative volume element (RVE) of the structures. The complex responses of the RVE under eight sinusoidal excitations are calculated and the complex stiffness matrix of the sandwich panels is obtained by the direct-solution steady-state dynamic analysis (DSDA) using the finite element method (FEM) in the frequency domain. Based on equivalent single-layer (ESL) theory and finite element-modal strain energy (FE-MSE) method, the natural frequencies, the mode shapes and the loss factors of the structures are obtained by shell models. The effectiveness of the homogenization method is validated by using pyramidal lattice truss sandwich panels made of carbon fiber reinforced plastics (CFRP). The results obtained by the homogenization method are compared with those obtained by experiments and solid models. The effects of the number of cells and damping layers are discussed.
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Research context

Composites

OpenAlex topics: Material Properties and Processing · Acoustic Wave Phenomena Research · Cellular and Composite Structures

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing, China

Hubei Key Laboratory of Advanced Aerospace Propulsion Technology, Design Institute of Hubei Aerospace Technology Academy, Wuhan, China

Structural Composites Research Center, Aerospace Research Institute of Material and Processing Technology, Beijing, China

Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures, Beijing Institute of Technology, Beijing, China

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, China

Funding

Science and Technology Project of Hebei Province · National Key Research and Development of China · Frontier and interdisciplinary innovation projects of Beijing Institute of Technology · National Natural Science Foundation of China · Basic Research Program · Beijing Institute of Technology Research Fund Program for Young Scholars · National Defense Basic Research Program of China · Laboratory research project of Beijing Institute of Technology

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