Crashworthiness Analysis and Enhancement of Aircraft Structures Under Vertical Impact Scenarios
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Crashworthiness Analysis and Enhancement of Aircraft Structures Under Vertical Impact ScenariosData
2020Cita bibliográfica
Crashworthiness Analysis and Enhancement of Aircraft Structures Under Vertical Impact Scenarios. J. Paz, J. Díaz, and L. Romera. Journal of Aircraft 2020 57:1, 3-12
Resumo
[Abstract] This research focuses on the crashworthiness study and enhancement of commercial aircraft
structures by developing crushable energy absorbers to work as vertical struts. To assess their
contribution on a representative crash scenario, a numerical simulation of a Boeing 737-200
drop test developed and verified with experimental data is used as a benchmark. The numerical
model is then enhanced with four hybrid energy absorbers designed for programmed and
progressive collapse, added in the cargo compartment connecting the underfloor beams and
the frames. These devices are composed of a square aluminum tube filled with a composite
skeleton and foam extrusions for maximized energy absorption. The enhanced aircraft is later
on simulated under hard landing and water ditching scenarios, analyzing the benefits resulting
from the absorbers according to structural efficiency and biometric criteria. Results show
increased plastic dissipation values by the main structural components given the modified collapse
mechanism obtained when adding the crushable absorbers. Peak acceleration values are
also reduced, consequently lessening the passenger injury prediction at the studied locations.
Palabras chave
Aircraft design
Crashworthiness
Hard landing
Water ditching
Biometric criteria
Hybrid energy absorbers
Crashworthiness
Hard landing
Water ditching
Biometric criteria
Hybrid energy absorbers