ADVANCED

Advanced heating system and control mode for homogeneous high temperature curing of large composite repairs

Coordinatore	GMI AERO SAS    more  Organization address address: Rue Buffault 9 city: PARIS postcode: 75009 contact info Titolo: Mr. Nome: Roland Cognome: Chemama Email: send email Telefono: +33 1 42821144 Fax: +33 1 42829838
Nazionalità Coordinatore	France [FR]
Totale costo	220˙000 €
EC contributo	165˙000 €
Programma	FP7-JTI Specific Programme "Cooperation": Joint Technology Initiatives
Code Call	SP1-JTI-CS-2010-03
Funding Scheme	JTI-CS
Anno di inizio	2011
Periodo (anno-mese-giorno)	2011-01-01   -   2012-06-30

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	GMI AERO SAS  Organization address address: Rue Buffault 9 city: PARIS postcode: 75009 contact info Titolo: Mr. Nome: Roland Cognome: Chemama Email: send email Telefono: +33 1 42821144 Fax: +33 1 42829838	FR (PARIS)	coordinator	129˙000.00
2	NATIONAL TECHNICAL UNIVERSITY OF ATHENS - NTUA  Organization address address: HEROON POLYTECHNIOU 9 ZOGRAPHOU CAMPUS city: ATHINA postcode: 15780 contact info Titolo: Ms. Nome: Georgia Cognome: Mertzelou Email: send email Telefono: +30 210 7722033 Fax: +30 210 7724181	EL (ATHINA)	participant	36˙000.00

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 Obiettivo del progetto (Objective)

'The required elevation of temperature for curing of composite repairs is usually achieved by resistance heating blankets, controlled through spot temperature measurements. Although this method is simple and works adequately for small repairs, when larger areas are heated, cold or hot spots frequently occur, due to variable heat losses, caused by geometrical asymmetry etc. For this reason, autoclave curing of large repairs is currently used, as the most reliable curing methodology, which is however accompanied by high cost, wastes and energy consumption. The scope of this proposal is to enable the extension of heating blankets technology for the treatment of large repairs (e.g. reversers), currently requiring autoclave heating. A five step process is proposed:a)Thermal transfer simulation, to retrieve the “thermal signature” of the part and experimental validation using heat flux sensors,b)Manufacturing of thermal blankets, namely adapted Variable Heating Elements (VHE), with denser or coarser heating elements inside, and standard Compensation Heating Elements (CHE), in order to compensate for dissimilar heat losses,c)Development of universal Advanced Heating Control Unit (AHCU), with innovative programmable closed loop control,d)Development of a specialized High Power Supply Unit (HPSU,e)Process validation. It is expected that, this innovative methodology will allow the performance of structural repairs, either totally out-of-autoclave or in combination with autoclave treatment, as required, thus improving the overall heating process and achieving large scale economies compared to current autoclave solutions. Given that specified repairs are generally standardized, steps (a) and (b) will only need to be performed once per P/N to be repaired, while the developed equipment described in steps (c) and (d) will be totally reusable, thus significantly decreasing the non-recurring cost encountered per repair.'