Integrated solutions for safe fuel tanks

Janszen, Gerardus; Grande, Antonio Mattia; Bettini, Paolo; Landro, L. Di

doi:10.2495/safe-v4-n3-271-279

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…The material studied in this work is an ethylene-methylacrylate copolymer-based ionomer (Surlyn®8940 by Du Pont de Nemours), which has demonstrated its remarkable self-healing capabilities when punctured in firearms shootings; thanks to these capabilities, a number of prospected applications in safety and space components have been proposed [6][7][8]. This polymer is intrinsically self-healing, in that the autonomic repair is activated by the damage itself.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Impact Damage with Self-Healing and Anti-Sloshing Materials in Aerospace Fuel Tanks

et al. 2019

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In this study, self-healing and anti-sloshing materials are investigated for mitigation of impact-induced damage. The integration of these systems, for the prevention of fire or explosion due to impact or bullet damage, may significantly improve the safety of aerospace fuel tanks. Leakage, after bullet penetration or debris impact, may be prevented or at least limited if the container’s walls are made by materials with self-healing capabilities. The aim of this work is to define the self-healing behavior of the EMAA ionomer (poly-Ethylene-MethAcrylic Acid copolymer), with reference to the energy dissipation mechanisms involved during damage and autonomic healing. An experimental investigation on the healing capacity of the material when perforated by bullets shot at medium velocity (250 m/s−450 m/s) was carried out. In these tests, the influence of friction, temperature, and multiple impacts on the healing process was examined and discussed. Moreover, the material response in operating conditions similar to those encountered in actual aeronautical applications, that is, in presence of pressurized fluid and anti-sloshing material (Explosafe®) was tested. Results show that the presence of the liquid increases the self-healing capabilities, which are, however, slightly affected by pressurization and internal anti-sloshing filler; the contribution in terms of sloshing reduction remains relevant.

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Section: Introductionmentioning

confidence: 99%

Mitigation of Impact Damage with Self-Healing and Anti-Sloshing Materials in Aerospace Fuel Tanks

et al. 2019

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“…Results of these works showed a general good self-healing behaviour, although the presence of the reinforcing composite or foam efficiently adherent to ionomer in some cases reduced the autonomic mending efficiency. This was mainly due to the deformation constraints provided by the foam or the fabric, which impaired the healing ability of the material [6,7]. A possible solution is the use of a honeycomb core interposed between the ionomer and the composite panel.…”

Section: Introductionmentioning

confidence: 99%

Prospective improvements for safer fuel tanks: Experimental tests

Janszen¹,

Galbiati²,

Landro³

2016

Int. J. CMEM

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In past studies, some of the authors presented how the integration of different systems, for the prevention of fires or explosions due to impact or bullet damage, may significantly improve the safety of fuel tanks. Leakage, after bullet penetration or debris impact, can be significantly reduced by introducing polymeric materials with self-healing capabilities for the container's walls, while an internal aluminium filler can reduce the sloshing and the danger of fuel ignition. In the present paper, an experimental evaluation of the proposed solution is presented. A ballistic test campaign on a fluid container was performed to investigate the interaction between an ethylene-methacrylic acid (EMAA)-based ionomeric wall (i.e. Dupont ® Surlyn 8940) and an internal aluminium filler (i.e. Explosafe ®). Results show that the presence of the fluid increases the self-healing capabilities, which are however slightly affected by the internal aluminium filler; the contribution in terms of sloshing reduction remains relevant. Moreover, additional configurations based on multilayer panels are presented. The authors studied the healing process of EMAA in a sandwich configuration made of one skin of ionomer and one skin of carbon fibre, separated by an aramidic honeycomb. The main objective of the honeycomb is to prevent the remarkable reduction of the healing capabilities observed when ionomer is directly coupled to aramidic fabric or composite panels. The new multilayer configurations have been tested at different impact conditions.

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Integrated solutions for safe fuel tanks

Cited by 2 publications

References 15 publications

Mitigation of Impact Damage with Self-Healing and Anti-Sloshing Materials in Aerospace Fuel Tanks

Mitigation of Impact Damage with Self-Healing and Anti-Sloshing Materials in Aerospace Fuel Tanks

Prospective improvements for safer fuel tanks: Experimental tests

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