Abstract
To investigate the mechanical properties of embedded honeycomb plates with high efficiency and accuracy, a new multilayered equivalent finite element method (FEM) model is proposed. A series of FEM numerical studies (modal analysis, static analysis, and shock spectrum analysis) are performed. The goal is to compare the errors produced by the multilayered equivalent method and by existing equivalent approaches. The obtained results indicate that the proposed model shows good agreement with the original plate. Moreover, based on the new model, a parametric study correlating the microstructure parameters (embedded depth/cell size) to modal frequency is proposed, and a multiparameter equation for frequency and embedded depth/cell size is established to serve as a basis for structural optimization design.
Highlights
An embedded honeycomb plate is a special honeycomb sandwich structure that is widely used in aerospace engineering owing to its low weight, high specific bending stiffness, strength under distributed loads, and good energyabsorbing capacity
Is study proposes an analytical method with a new multilayered equivalent finite element method (FEM) model. e feasibility and accuracy of the proposed method were verified by comparing the calculation results obtained using the proposed FEM model with the current FEM results. e honeycomb panel geometry effect was studied. is study can serve as a guide for optimizing the honeycomb sandwich structure
Many design parameters can affect the natural frequency of the honeycomb plate, including the skin thickness, core thickness, cell size, and embedded depth
Summary
An embedded honeycomb plate is a special honeycomb sandwich structure that is widely used in aerospace engineering owing to its low weight, high specific bending stiffness, strength under distributed loads, and good energyabsorbing capacity. Finite element analysis (FEA) of a honeycomb sandwich panel has been conducted to obtain accurate results for complex problems. It requires a long computational time, and the required time increases with problem complexity. Another important problem facing finite element method (FEM) modeling engineers is how to create better designs and to reduce manufacturing costs by predicting the structural performance accurately. Many equivalent methods for a honeycomb sandwich plate have been studied. Boudjemai et al [1] presented a feasible and practical whole plate equivalent method. Is study proposes an analytical method with a new multilayered equivalent FEM model. Is study proposes an analytical method with a new multilayered equivalent FEM model. e feasibility and accuracy of the proposed method were verified by comparing the calculation results obtained using the proposed FEM model with the current FEM results. e honeycomb panel geometry effect was studied. is study can serve as a guide for optimizing the honeycomb sandwich structure
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