Impact Resistance Analysis of a Composite Double-Layer Honeycomb Sandwich Structure

A composite double-layer honeycomb sandwich structure is proposed to improve the impact resistance of fillers in helicopter rotors, 44 groups of those structures are numerically simulated by LS-DYNA finite element analysis software. An approximate expression for fracture energy of the composite stru...

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Bibliographic Details
Published in:Strength of materials 2021, Vol.53 (1), p.126-133
Main Authors: Bi, G. J., Yin, J. P., Wang, Z. J., Han, Y. Y., Jia, Z. J.
Format: Article
Language:English
Subjects:
Aluminum
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Composite structures
Diameters
Energy absorption
Finite element method
Helicopters
Honeycomb structures
Impact analysis
Impact resistance
Materials Science
Plates, Aluminum
Rotary wings
Sandwich structures
Solid Mechanics
Wall thickness
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Summary:A composite double-layer honeycomb sandwich structure is proposed to improve the impact resistance of fillers in helicopter rotors, 44 groups of those structures are numerically simulated by LS-DYNA finite element analysis software. An approximate expression for fracture energy of the composite structure is derived. The cell diameter, its wall thickness, and material strength are related to the impact resistance of the structure. With a decrease in the cell diameter and an increase in its wall thickness and material strength, the energy absorption rate of the composite structure is gradually enhanced. Among the 44 composite groups, the structure with the cell diameter of D = 3 mm, the wall thickness of 0.08 mm, and 4340 steel possessed the best energy absorption effect, the energy absorption rate is 54.7% more than for the cell diameter of D = 6 mm and 2024 aluminum. The honeycomb structure composed of various cell diameters has little difference, but it exerts a certain effect on the cell diameter.
ISSN:0039-2316
1573-9325
DOI:10.1007/s11223-021-00268-0