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INNOVATIVE REPAIR OF AEROSPACE STRUCTURES WITH CURING OPTIMIZATION AND LIFE CYCLE MONITORING ABILITIES

INNOVATIVE REPAIR OF AEROSPACE STRUCTURES WITH CURING OPTIMIZATION AND LIFE CYCLE MONITORING ABILITIES

Objective

Bonded composite patches are ideal for aircraft structural repair as they offer enhanced specific properties, case-tailored performance and excellent corrosion resistance. Bonding further eliminates stress concentrations induced from mechanical fastening of metal sheets, seals the interface, and reduces the risk of fretting fatigue between the patch and the component. IAPETUS focuses on the use of improved composite repair systems offering (i) the introduction of new on-aircraft simplified curing technologies, (ii) enhanced fatigue and damage tolerance properties and (iii) integrated damage sensing. This will be performed via the incorporation of carbon nanotubes (CNTs) both in the composite matrix of the repair patch as well as in the adhesive. The use CNT modified repair concept will lead to improved performance in the blunting of stress concentrations in the parent surface and the inhibition of crack propagation, leading to enhanced fatigue resistance at the locus of the repair as well as for the patch itself. At the same time, the patch repair acquires additional functionalities. The CNT doped Carbon Composites can be tailored to reduce the galvanic corrosion in repaired Aluminium structures. As the patch becomes electrically and thermally conductive thermal energy can be infused in the patch either by direct resistance heating (using the patch itself as heating element via the application of electrical voltage) or by induction heating, to instigate a uniform matrix polymerization since the patch system appears improved thermal conductivity too. The electrically conductive percolated network can be employed to assess the damage within the patch and its interface with the repaired structure, as conductivity changes mirror the damage in the doubler/substrate system by tracing micro damage through breaches in the CNT network; thus, the structural efficiency monitoring at any stage in the service life of the aerostructure can be assessed non-destructively.
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Coordinator

FUNDACION TECNALIA RESEARCH & INNOVATION

Address

Parque Cientifico Y Tecnologico De Bizkaia, Astondo Bidea, Edificio 700
48160 Derio Bizkaia

Spain

Activity type

Higher or Secondary Education Establishments

EU Contribution

€ 480 126,15

Administrative Contact

Sonia Flórez (Dr.)

Participants (9)

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WYTWORNIA SPRZETU KOMUNIKACYJNEGO PZL-Swidnik Spolka Akcyjna

Poland

EU Contribution

€ 152 950

HUNTSMAN ADVANCED MATERIALS (SWITZERLAND) GMBH

Switzerland

EU Contribution

€ 50 359,38

PANEPISTIMIO PATRON

Greece

EU Contribution

€ 411 990

INASCO HELLAS ETAIREIA EFARMOSMENON AERODIASTIMIKON EPISTIMON EE

Greece

EU Contribution

€ 186 899,44

DAHER AEROSPACE SAS

France

EU Contribution

€ 45 305,62

GMI AERO SAS

France

EU Contribution

€ 239 850

THE UNIVERSITY OF SHEFFIELD

United Kingdom

EU Contribution

€ 226 440

HELLENIC AEROSPACE INDUSTRY SA

Greece

EU Contribution

€ 223 674,68

PANEPISTIMIO IOANNINON

Greece

EU Contribution

€ 321 999,73

Project information

Grant agreement ID: 234333

Status

Closed project

  • Start date

    1 June 2009

  • End date

    31 December 2012

Funded under:

FP7-TRANSPORT

  • Overall budget:

    € 3 342 226,23

  • EU contribution

    € 2 339 595

Coordinated by:

FUNDACION TECNALIA RESEARCH & INNOVATION

Spain