Crash concepts for CFRP transport aircraft – comparison of the traditional bend frame concept versus the developments in a tension absorbers concept

Waimer, Matthias; Feser, Thomas; Schatrow, Paul; Schueler, Dominik

doi:10.1080/13588265.2017.1341279

Cited by 18 publications

(4 citation statements)

References 24 publications

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“…Tension loads that act in a crash scenario in the cargo crossbeam, or the bolted connection between the passenger crossbeam and frame, are used to absorb energy in a controlled manner by progressive bearing failure. Predictions from full-scale simulations showed that up to 50% of the overall absorbed energy could be absorbed by such tension-absorbers [10].…”

Section: Introductionmentioning

confidence: 99%

“…To prevent pull-through failure, specially designed washers and notches are used, as shown in Figure 1(b). Airbus and DLR have undertaken experimental and numerical studies of this concept using single-and multi-bolt coupons and structural elements [9,10,16]. Further studies on the effects of individual material and geometric parameters considered a simplified design where a pin is pulled through a composite plate.…”

Section: Introductionmentioning

confidence: 99%

“…In a European Commission funded research project, DLR and the University of Limerick (ULIM) are collaborating to extend the studies on tension absorbers in [10,14,[16][17][18]. In the present work, the effects of geometric and material parameters on bearing strength and energy absorption at dynamic loading rates are studied.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of transient dynamic loading on the energy absorption capability of composite bolted joints undergoing extended bearing failure

Feser

Hassan

Waimer

et al. 2020

Composite Structures

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of transient dynamic loading on the energy absorption capability of composite bolted joints undergoing extended bearing failure

Feser

Hassan

Waimer

et al. 2020

Composite Structures

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“…The Italian Aerospace Research Centre recently conducted a drop test of a full-scale fuselage section of a regional aircraft made entirely of composite materials (Luigi et al, 2019). In addition to the drop tests of the fuselage section, the impact tests of the subfloor structures were also carried out to investigate energy absorption capacities and impact loading responses (Waimer et al, 2017;Sturm et al, 2014;Kellas and Jackson, 2010). These experiments have facilitated the development of various research topics aimed at improving crashworthiness of aircraft.…”

Section: Introductionmentioning

confidence: 99%

Crash simulation of fuselage section in the rebound process and the secondary-impact process

Jin

Xiang

2020

AEAT

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Purpose This paper aims to investigate the rebound process and the secondary-impact process of the fuselage section that occurs in the actual crash events. Design/methodology/approach A full-scale three-dimensional finite element model of the fuselage section was developed to carry out the dynamic simulations. The rebound process was simulated by removing the impact surface at a certain point, while the secondary-impact process was simulated by striking the impact surface against the fuselage bottom after the first impact. Findings For the rebound process, the fuselage structure restores deformation due to the springback of the fuselage bottom, and it results in structural vibration of the fuselage section. For the secondary-impact process, the fuselage deformation is similar with that of the single impact process, indicating that the intermittent impact loading has little influence on the overall deformation of the fuselage section. The strut failure is the determining factor to the acceleration responses for both the rebound process and the secondary-impact process. Practical implications The rebound process and the secondary-impact process, which is difficult to study by experiments, was investigated by finite element simulations. The structure deformations and acceleration responses were obtained, and they can provide guidance for the crashworthy design of fuselage structures. Originality/value This research first investigated the rebound process and the secondary-impact process of the fuselage section. The absence of the ground load and the secondary-impact was simulated by controlling the impact surface, which is a new simulating method and has not been used in the previous research.

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Collapse mechanism and occupant injury analysis under vertical impact of the aircraft fuselage structure

Mou,

Feng,

Xie

et al. 2024

Nonlinear Dyn

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Crash concepts for CFRP transport aircraft – comparison of the traditional bend frame concept versus the developments in a tension absorbers concept

Cited by 18 publications

References 24 publications

Effects of transient dynamic loading on the energy absorption capability of composite bolted joints undergoing extended bearing failure

Effects of transient dynamic loading on the energy absorption capability of composite bolted joints undergoing extended bearing failure

Crash simulation of fuselage section in the rebound process and the secondary-impact process

Collapse mechanism and occupant injury analysis under vertical impact of the aircraft fuselage structure

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