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Efficient design and verification of composite structures

Objective



Objectives and content
The aeronautical industry needs to reduce the cost for
verification of composite structures to maintain the
European share of the market. Current verification
procedures are to a very large extent based on testing
both for material qualification and establishment of
design data, as well as for static and fatigue life
substantiation. Single companies can only make minor
improvements to the verification procedure while a joint
programme in which aeronautical industries and research
institutes are working together can take a huge step
ahead.
The primary objective of the EDAVCOS programme is to
determine a cost efficient route to certification for
composite aircraft structures. The means is a validated
analysis based procedure for structural verification from
initial design to final certification. The targets are
50% reduction of the total cost for verification and 60%
time scale reduction.
The programme will consist of a method development part,
an application and validation part, and a procedure
definition part. The objective of the methods
development part is to develop and validate fewer tests
demanding design methods and new test procedures
incorporating e.g. truncation and elimination criteria
for fatigue testing. The reduction of the amount of
testing and time spent in testing will be achieved by the
development and validation of analytical and numerical
tools suggested within this programme. The starting
point for this research is the large amount of promising
research results obtained by the partners within several
nationals and international research programmes. The
major part of these methods have only been applied and
validated at the coupon level and have therefore not been
applied in the development of real aircraft structures.
The strong participation of research institutes in this
programme will give the right conditions for development
of methods, which will reach the level of structural
application. The methods developed will be applicable to
generic wing and fuselage structures comprising stiffened
panels, sandwich panels, shear webs and bolted joints.
The objective with the application and validation part is
to demonstrate the applicability and validity of the
methods on benchmarks; representative of the generic
structural elements mentioned above which will be tested
in the programme. The tests will be well instrumented
and post-mortem failure analyses of the specimens will
give valuable information about the failure modes, which
can be used for further improvement of the analysis
methods. The objective with the procedure definition
part is to define a new verification procedure based on
the increased analysis capability achieved in the methods
development part and new approaches for fatigue testing,
handling of impact damages, and environmental effects.
This part of the programme will be carried out with
support from appointed airworthiness experts.
In addition to the targeted overall cost and time scale
reduction for verification of composite aircraft
structures a reduction of the life cycle cost is
anticipated due to the increased analysis capability.
The increased analysis capability will also lead to
weight savings since more accurate computations allow
conservatism to be reduced simultaneously as the overall
safety level is increased.
This programme will significantly contribute to the longterm objectives set for Aeronautical Technologies in the
IMT work programme and especially 3A3.14 with respect to
cost efficiency, weight reduction and safety.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

SAAB AB
Address

581 88 Linkoeping
Sweden

Participants (14)

Alenia Aerospazio - Un'Azienda Finmeccanica SpA
Italy
Address
Viale Dell'aeronautica
80038 Pomigliano D'arco - Napoli
BAE SYSTEMS (OPERATIONS) LTD
United Kingdom
Address
Warton Aerodrome
PR4 1AX Preston
Centro Italiano Ricerche AerospazialiScpA
Italy
Address
Via Maiorise
81043 Napoli - Capua
Construcciones Aeronauticas SA
Spain
Address
S/n,avda. John Lennon
28906 Getafe - Madrid
EUROPEAN AERONAUTICS DEFENSE AND SPACE COMPANY EADS GIE
France
Address
Boulevard De Montmorency 37
75781 Paris
FFA - THE AERONAUTICAL RESEARCH INSTITUTE OF SWEDEN
Sweden
Address
12-14,Ranhammarsv?gen 12-14
161 11 Bromma
GERMAN AEROSPACE CENTRE
Germany
Address
Lilienthalplatz 7
38108 Braunschweig
ISTRAM - INSTITUTE OF STRUCTURES AND ADVANCED MATERIALS
Greece
Address
Patron- Athinon 57
26441 Patras
Instituto Nacional de T?cnica Aeroespacial "Esteban Terradas"
Spain
Address
Km 4,Carretera De Ajalvir Km 4
28850 Madrid
Nationaal Lucht- en Ruimtevaart Laboratorium
Netherlands
Address

8300 AD Emmeloord
Office National d'Etudes et de Recherches A?rospatiales
France
Address
29 Avenue De La Division Leclerc
92322 Châtillon
SA Belge de Constructions Aéronautiques
Belgium
Address
1470,Chaussée Haecht
1130 Bruxelles
Sabca Limburg N.V.
Belgium
Address
32,Dellestraat 32
3560 Lummen
Secretary of State for Defence - Ministry of Defence
United Kingdom
Address
Ively Road
GU14 0LX Farnborough - Hampshire