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Dynamics in Aircraft Engineering Design and Analysis for Light Optimized Structures

PROJECTS
Funding
European
European Union
Duration
-
Status
Complete with results
Geo-spatial type
Other
Total project cost
€5 857 184
EU Contribution
€3 962 468
Project website
Project Acronym
DAEDALOS
STRIA Roadmaps
Vehicle design and manufacturing (VDM)
Transport mode
Airborne icon
Transport policies
Societal/Economic issues
Transport sectors
Passenger transport,
Freight transport

Overview

Call for proposal
FP7-AAT-2010-RTD-1
Link to CORDIS
Background & Policy context

Today's design and certification procedures for aircrafts are mainly based on conservative static loading which leads to additional weight and, potentially, to a structurally unsafe aircraft.

Objectives

The overall objective of the DAEDALOS project is to develop methods and procedures to determine dynamical loads considering the effects of dynamic buckling, material damping and mechanical delay during aircraft service. Use of advanced analysis and design principles from DAEDALOS will partly remove the uncertainty and the conservatism of today's design and certification procedures.

Methodology

DAEDALOS will form the basis for improved common design practices by:

  • Determining accurate dynamic load spectra to be used for structural sizing;
  • Reducing the added weight of aircraft structural components due to conservative design in compliance with quasi-static loads by using more realistic equivalent dynamic loads. This goal will be achieved through improved introduction of the structure damping capacity and detailed analysis;
  • Increasing structural safety using more realistic loading scenarios;
  • Establishing new procedures for the definition of loads to be used during aircraft design and certification by authorities.

Funding

Parent Programmes
Institution Type
Public institution
Institution Name
The European Commission
Type of funding
Public (EU)
Specific funding programme
FP7-TRANSPORT

Results

Modelling dynamic loading of aircraft

The European aircraft industry and transport policy are demanding safer and greener transport systems. EU researchers in the DAEDALOS project have taken an innovative design approach for aerospace structures that will result in aircraft weight reduction with corresponding fuel saving and lower emissions and operating costs.

Current design standards based on conservative static loading often lead to additional and unnecessary weight. Without adequate understanding and consideration of dynamic loads, resulting designs may even be unsafe. The 'Dynamics in aircraft engineering design and analysis for light optimized structures' (http://www.daedalos-fp7.eu/ (DAEDALOS)) project has characterised dynamic loads during aircraft service. Incorporation of effects of material damping, dynamic buckling and mechanical hysteresis stand to remove the uncertainty and conservatism of present-day aircraft certification procedures.

Conventional design practice considers the fuselage as a beam on which a load is statically applied. It is a highly simplified model assuming that no energy is absorbed from the fuselage by the stringer/frame/skin constructions. It assumes that the full load propagates along the fuselage without attenuation from structural damping.

This is not the case in the real system. In addition, dynamic buckling can be much greater than static buckling, meaning that the fuselage could theoretically absorb more energy without breaking under a higher load than is predicted in the static case. The end result of these assumptions is a heavier design that may not address real-life dynamic loading conditions.

DAEDALOS developed a mid-size business jet model for the analysis. The team developed full finite element and hybrid models at various scales. Various methods for evaluating structural energy dissipation via damping were developed and implemented. These included a strain energy method, as well as quasi-linear viscoelastic material and generalised Maxwell viscous material damping models.

A rigorous campaign of experimental testing supported model development. The team evaluated materials damping of an aluminium alloy and two carbon-epoxy composites at coupon level using a variety of techniques. Panels and shells representative of typical components were also tested subjected to static and dynamic loads. Furthermore, the components were assessed in terms of weight benefits.

Through its advanced models, simulation tools and databases, the DAEDALOS project established a scientific basis for new aircraft design and certification standards reflecting energy dissipation during dynamic loading. Dynamic analysis is part of the design process in many industries and DAEDALOS deliverables could therefore be appropriate in a wide range of applications and fields.

Partners

Lead Organisation
Organisation
Politecnico Di Milano
Address
Piazza Leonardo Da Vinci 32, 20133 Milano, Italy
Organisation website
EU Contribution
€551 259
Partner Organisations
Organisation
Totalforsvarets Forskningsinstitut
Address
Gullfossgatan, 164 90 Stockholm, Sweden
Organisation website
EU Contribution
€316 100
Organisation
Israel Aerospace Industries Ltd.
Address
Ben Gurion International Airport, Lod 70100, Israel
Organisation website
EU Contribution
€295 000
Organisation
Rheinisch-Westfaelische Technische Hochschule Aachen
Address
Templergraben, 52062 Aachen, Germany
Organisation website
EU Contribution
€225 000
Organisation
Alenia Aermacchi Spa
Address
Viale Dell'aeronautica Snc, 80038 Pomigliano D'arco (Na), Italy
Organisation website
EU Contribution
€323 809
Organisation
Smr Engineering & Development Sa
Address
Dufourstrasse 109B, 2502 Bienne, Switzerland
EU Contribution
€301 800
Organisation
Vysoke Uceni Technicke V Brne
Address
Antoninska 548/1, 60190 Brno, Czechia
Organisation website
EU Contribution
€167 920
Organisation
Deutsches Zentrum Fr Luft Und Raumfahrt E.v
Address
Linder Hoehe, 51147 KOELN, Germany
Organisation website
EU Contribution
€488 264
Organisation
Alenia Aermacchi Spa
Address
Viale Dell'aeronautica Snc, 80038 Pomigliano D'arco (Na), Italy
Organisation website
EU Contribution
€0
Organisation
Technion - Israel Institute Of Technology
Address
Senate Building Technion City, Haifa 32000, Israel
EU Contribution
€322 375
Organisation
Latecoere Czech Republic Sro
Address
Beranovych 65 Letnany, 19902 Praha, Czechia
EU Contribution
€200 000
Organisation
Aernnova Aerospace S.a.u.
Address
LEONARDO DA VINCI Parque Tecnologico de ALAVA 13, 01510 MIÑANO (ALAVA), Spain
Organisation website
EU Contribution
€267 500
Organisation
Advanced Lightweight Engineering Bv
Address
Rotterdamseweg 145, 2628AL Delft, Netherlands
EU Contribution
€285 250
Organisation
Gottfried Wilhelm Leibniz Universitaet Hannover
Address
Welfengarten 1, 30167 Hannover, Germany
Organisation website
EU Contribution
€218 191

Technologies

Technology Theme
Aircraft design and manufacturing
Technology
Finite Element Analysis of dynamic loading of aircraft
Development phase
Research/Invention

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