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DAHLIAS SIGNED

Development and application of hybrid joining in lightweight integral aircraft structures

Total Cost €

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EC-Contrib. €

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Partnership

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Project "DAHLIAS" data sheet

The following table provides information about the project.

Coordinator
HELMHOLTZ-ZENTRUM GEESTHACHT ZENTRUM FUR MATERIAL- UND KUSTENFORSCHUNG GMBH 

Organization address
address: MAX PLANCK STRASSE 1
city: GEESTHACHT
postcode: 21502
website: www.gkss.de

contact info
title: n.a.
name: n.a.
surname: n.a.
function: n.a.
email: n.a.
telephone: n.a.
fax: n.a.

 Coordinator Country Germany [DE]
 Total cost 1˙033˙987 €
 EC max contribution 953˙887 € (92%)
 Programme 1. H2020-EU.3.4.5.4. (ITD Airframe)
 Code Call H2020-CS2-CFP07-2017-02
 Funding Scheme CS2-IA
 Starting year 2018
 Duration (year-month-day) from 2018-10-01   to  2021-03-31

 Partnership

Take a look of project's partnership.

# participants  country  role  EC contrib. [€] 
1    HELMHOLTZ-ZENTRUM GEESTHACHT ZENTRUM FUR MATERIAL- UND KUSTENFORSCHUNG GMBH DE (GEESTHACHT) coordinator 283˙225.00
2    INSTITUT DE SOUDURE ASSOCIATION FR (VILLEPINTE) participant 263˙250.00
3    BELGISCH INSTITUUT VOOR LASTECHNIEK VZW BE (BRUSSEL) participant 220˙512.00
4    TRA-C INDUSTRIE SAS FR (LES OLMES) participant 120˙837.00
5    CHEMETALL GMBH DE (FRANKFURT AM MAIN) participant 66˙062.00

Map

 Project objective

The main objective of the DAHLIAS project is to optimise hybrid joining (Refill Friction Stir Spot Welding, RFSSW, with an adhesive sealant bond) for application in aircraft structures. RFSSW is a solid-state joining technology especially applicable to lightweight alloys in similar and dissimilar configurations. The process has been successfully applied to difficult-to-weld and non-weldable alloys and is considered a potential replacement of mechanical fastening. Overlap joints in aircraft structures require the use of sealants for corrosion protection reasons. Using sealants with an adhesive function would complement the high quality joints produced by RFSSW by not only protecting against corrosion but also contributing to the overall mechanical performance of the structure. To achieve the main goal of this project a work plan consisting of eight work packages has been devised. Two work packages are focused on the RFSSW process development using standard samples with and without adhesive sealant. In parallel the adhesive sealant technology, including surface pre-treatment will be developed. The hybrid joining solution developed in this project will be compared to conventional joining technologies to define its potential. Hybrid joining brings a number of advantages to production and performance of aircraft structures. The change from differential to integral design introduces new challenges in the analysis of mechanical performance. Hence, the damage tolerance behaviour of hybrid joints is also investigated in this project. Quality control methods will be investigated by selecting NDT methods and by process control based on online monitoring of parameters. In the last phase of this project technology demonstrators will be produced to evaluate the capabilities of the proposed technology in actual aircraft structures. The consortium (3 R&D and 2 industrial partners) has the exact fitting, prooven expertise and high excellence. HZG (coordinator) holds key patents.

 Publications

year authors and title journal last update
List of publications.
2019 K. Faes
Refill friction stir spot welding of aluminium EN AW-7075-T6
published pages: , ISSN: , DOI:
Presented at the “6th International Conference on Scientific and Technical Advances on Friction Stir Welding & Processing” 2020-03-05
2019 K. Faes
Refill friction stir spot welding of EN AW-7075-T6 sheets
published pages: , ISSN: , DOI:
Erfahrungsaustausch Reibschweisssen, SLV Munich, 12 March 2019. 2020-03-05
2019 J.F. dos Santos
Development and Application of Hybrid Joining in Lightweight Integral Aircraft Structures – DAHLIAS
published pages: , ISSN: , DOI:
Proceedings of the “2019 International Congress on Welding, Additive Manufacturing and Associated Non-Destructive Testing” 2020-02-28
2019 J.F. dos Santos
Development and Application of Hybrid Joining in Lightweight Integral Aircraft Structures – DAHLIAS
published pages: , ISSN: , DOI:
Presented at the“6th International Conference on Scientific and Technical Advances on Friction Stir Welding & Processing” 2020-02-28

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The information about "DAHLIAS" are provided by the European Opendata Portal: CORDIS opendata.

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