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Published in: Mechanics of Composite Materials 6/2022

25-01-2022

Protection of Aircraft Lattice Shell Made of UD CFRP Ribs from Low-Velocity Impacts

Authors: I. O. Kondakov, A. V. Chernov, A. N. Shanygin, S. B. Sapozhnikov

Published in: Mechanics of Composite Materials | Issue 6/2022

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Abstract

The paper considers new protection pads located under a lattice shell of aircraft made of UD CFRP ribs and the problems arising from low-velocity impacts (LVI). It is shown that the aerodynamic sheathing and the loadbearing lattice shell should be separated by protective pads made of an elastoplastic material to absorb the impact energy without damaging the ribs. With finite element modeling, the calculation models were developed to assess the strength of UD CFRP ribs. On the example of the lattice shell of a business-class aircraft with a diameter of 2 m, rational parameters of the shell protection under LVI with an energy of up to 50 J were determined. Variation of the thickness of the protective pads allows to ensure the required maximum level of damage to the lattice shell. The results of impact tests on the shell fragments and their residual compressive strength are in good agreement with the calculated by FEM.

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Metadata
Title
Protection of Aircraft Lattice Shell Made of UD CFRP Ribs from Low-Velocity Impacts
Authors
I. O. Kondakov
A. V. Chernov
A. N. Shanygin
S. B. Sapozhnikov
Publication date
25-01-2022
Publisher
Springer US
Published in
Mechanics of Composite Materials / Issue 6/2022
Print ISSN: 0191-5665
Electronic ISSN: 1573-8922
DOI
https://doi.org/10.1007/s11029-022-09994-1

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