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Cost Effective Reinforcement of Fastener Areas in Composites

Cost Effective Reinforcement of Fastener Areas in Composites

Objective

CERFAC’s major challenge is the design and manufacturing of strong and cost-efficient joints for high performance CFRP aero-structures.

In particular, transfer of distributed loading along rivets lines in the assembly of flat or curved thin-walled stiffened panels, and introduction of concentrated loads for connecting lugs with thicker laminates are special & frequent problems. Hence, CERFAC focuses on applications with significant volume and occurrence (butt straps & splices, orbital and longitudinal multi-functional joints, single and multiple bolts attachments), such that an increase of the strength to cost ratio of joints could lead to overall significant cost and weight savings.

In this frame, CERFAC’s high level objectives are
• To increase the strength to cost ratio and damage tolerance of fastener areas in CFRP structures without weight, thickness and stiffness penalty
• To reduce the number or fasteners (10 to 100% reduction), the local thickening of fastener areas and minimize the manufacturing & assembly costs (20% reduction).

This will be achieved thanks to advanced and rigorous research & development activities with the following major deliverables and outputs:
• A catalogue of validated reinforcement solutions at the locus of fastener holes or edges leading to lighter, stronger and more damage tolerant designs.
• Innovative and efficient joining concepts combining some of the investigated reinforcement solutions. This contribution would then help reducing further the number of fasteners, while increasing the load bearing capacity and damage tolerance of the assembly, with a significant step towards a reduced manufacturing cost. Repair and disassembly will be considered as mandatory requirements in this second contribution.
• Upgraded design, analysis and testing methodologies as well as pragmatic guidelines for future exploitation of the new concepts in the next generation aircrafts.
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Coordinator

CENTRE DE RECHERCHE EN AERONAUTIQUE ASBL - CENAERO

Address

Batiment Eole, 1er éTage - Rue Des FrÈRes Wright 29
6041 Gosselies

Belgium

Activity type

Research Organisations

EU Contribution

€ 460 592

Participants (14)

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SOCIETE ANONYME BELGE DE CONSTRUCTIONS AERONAUTIQUES-S.A.B.C.A.

Belgium

EU Contribution

€ 264 600

VYZKUMNY A ZKUSEBNI LETECKY USTAV A.S.

Czechia

EU Contribution

€ 238 500

DEUTSCHES ZENTRUM FUER LUFT - UND RAUMFAHRT EV

Germany

EU Contribution

€ 367 875

AIRBUS DEFENCE AND SPACE GMBH

Germany

EU Contribution

€ 291 745

AIRBUS HELICOPTERS DEUTSCHLAND GMBH

Germany

EU Contribution

€ 266 622

UNIVERSITAET STUTTGART

Germany

EU Contribution

€ 412 520

DASSAULT AVIATION

France

EU Contribution

€ 237 500

AIRBUS GROUP SAS

France

EU Contribution

€ 263 633

PANEPISTIMIO PATRON

Greece

EU Contribution

€ 224 070

STICHTING NATIONAAL LUCHT- EN RUIMTEVAARTLABORATORIUM

Netherlands

EU Contribution

€ 342 959

FACHHOCHSCHULE NORDWESTSCHWEIZ

Switzerland

EU Contribution

€ 418 197

ZURCHER HOCHSCHULE FUR ANGEWANDTE WISSENSCHAFTEN

Switzerland

EU Contribution

€ 252 480

Biteam AB

Sweden

EU Contribution

€ 185 000

KUNGLIGA TEKNISKA HOEGSKOLAN

Sweden

EU Contribution

€ 354 922

Project information

Grant agreement ID: 266026

Status

Closed project

  • Start date

    1 October 2010

  • End date

    31 December 2014

Funded under:

FP7-TRANSPORT

  • Overall budget:

    € 6 739 059,80

  • EU contribution

    € 4 581 215

Coordinated by:

CENTRE DE RECHERCHE EN AERONAUTIQUE ASBL - CENAERO

Belgium