Methods of evaluating ES-2 leg flail in dynamic evaluation and certification tests of side-facing aircraft seats

Huculak, Robert D.; Lankarani, Hamid M.

doi:10.1080/13588265.2015.1076586

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…The current design practice is also addressed to limit the loads involving the passengers during a crash and, then, to limit the passengers' injuries risk. Dynamic testing of seats and restraint systems [36][37][38][39] has been made over the years to verify the new federal regulations on injury criteria for aircraft occupants. This aspect plays a key role in the design of both crashworthy and protective systems: the airframe must absorb most of the energy by collapsing in a controlled way so that the forces acting upon the occupants are reduced [40,41], as indicated by the FAA.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Crashworthiness Study of a Full-Scale Composite Fuselage Section

Caputo¹,

Lamanna²,

Perfetto³

et al. 2021

AIAA Journal

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This work deals with the development of an improved numerical model, based on the explicit finite element method, aimed at investigating the energy absorption capabilities of a full-scale composite fuselage section of a regional aircraft and the related biomechanical injuries affecting the passengers. The experiment, conducted within the Italian national research project named "Innovative and Advanced Verification and Certification methods," consisted in a drop test of a fully equipped barrel performed at the Italian Aerospace Research Centre, according to the special conditions of the Federal Aviation Regulation Certification Specification 25. From a free-fall height of about 4 m, a ground contact impact velocity of 9.14 m∕s was measured. The numerical model has been developed faithfully to the experiment. Numerical analysis results, in terms of global deformations, failures, local accelerations, and biomechanical injuries, have been compared with the experimental ones to assess the prediction capability of the proposed numerical modeling procedure with a focus on improved crashworthy components for certification by analysis future purpose.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Crashworthiness Study of a Full-Scale Composite Fuselage Section

Caputo¹,

Lamanna²,

Perfetto³

et al. 2021

AIAA Journal

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“…Indeed, the cargo subfloor area first experiences the impact with the ground, absorbing most of the kinetic energy. In particular, the impact energy is absorbed by the frame and the hinges [24][25][26][27][28][29][30][31][32][33]. The fuselage frame can dissipate almost half of the impact energy during the impact.…”

Section: Introductionmentioning

confidence: 99%

An Insight on the Crashworthiness Behavior of a Full-Scale Composite Fuselage Section at Different Impact Angles

et al. 2019

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In the present paper, advanced numerical methodologies have been adopted to investigate the influence of impact angle on the crashworthiness behavior of a composite fuselage section. The analyzed fuselage section, made of unidirectional fiber-reinforced material, woven fabric material, and aluminum material, is representative of a regional aircraft fuselage. Two different angles of impact with rigid ground have been investigated and reported: Perpendicularly to the ground and with a pitch angle of 3 degrees with respect to the ground. The adopted numerical models have been preliminarily validated with experimental data from a drop test on a full-scale fuselage section, in terms of deformations and failure location and progression. The correlation between the numerical model and the experimental test has enabled evaluation of the effect of the impact angle on the deformation and damage in the sub-cargo floor area.

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Thoracic Responses and Injuries of Male Post-Mortem Human Subjects in a Homogeneous Rear-Facing Seat During High-Speed Frontal Impact

Kang,

Baker,

DeWitt

et al. 2024

Ann Biomed Eng

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Methods of evaluating ES-2 leg flail in dynamic evaluation and certification tests of side-facing aircraft seats

Cited by 5 publications

References 7 publications

Experimental and Numerical Crashworthiness Study of a Full-Scale Composite Fuselage Section

Experimental and Numerical Crashworthiness Study of a Full-Scale Composite Fuselage Section

An Insight on the Crashworthiness Behavior of a Full-Scale Composite Fuselage Section at Different Impact Angles

Thoracic Responses and Injuries of Male Post-Mortem Human Subjects in a Homogeneous Rear-Facing Seat During High-Speed Frontal Impact

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