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New Robust DESIgn Guideline for Imperfection Sensitive COmposite Launcher Structures

Objective

"European Space industry demand for lighter and cheaper launcher transport systems. The proposed project DESICOS contributes to these aims by a new design approach for imperfection sensitive composite launcher structures, exploiting the worst imperfection idea efficiently: the Single Perturbation Load Approach. Currently, imperfection sensitive shell structures prone to buckling are designed according the NASA SP 8007 guideline using the conservative lower bound curve. The guideline dates from 1968, and the structural behaviour of composite material is not considered appropriately, in particular since the imperfection sensitivity of shells made from such materials depends on the lay-up design. The buckling loads of CFRP structures may vary by a factor of about 3 just by changing the lay-up. This is not considered in the NASA SP 8007, which allows designing only so called ""black metal"" structures. Here is a high need for a new precise and fast design approach for imperfection sensitive composite structures which allows significant reduction of structural weight and design cost. For most relevant architectures of cylindrical and conical launcher structures (monolithic, sandwich, isogrid - without and with holes) DESICOS will investigate a combined methodology from the Single Perturbation Load approach and a specific stochastic approach which guarantees an effective and robust design. A recent investigation demonstrated, that an axially loaded unstiffened cylinder, which is disturbed by a large enough single perturbation load, is leading directly to the design buckling load 45% higher compared with the respective NASA SP 8007 design. All results will be summarized in a handbook for the design of imperfection sensitive composite structures. The potential will be demonstrated within different industrially driven use cases."

Coordinator

DEUTSCHES ZENTRUM FUER LUFT - UND RAUMFAHRT EV

Address

Linder Hoehe
51147 Koeln

Germany

Activity type

Research Organisations

EU Contribution

€ 442 700

Administrative Contact

Felicitas Kutz (Mrs.)

Participants (11)

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AIRBUS DEFENCE AND SPACE SAS

France

EU Contribution

€ 150 000

AIRBUS DS GMBH

Germany

EU Contribution

€ 150 000

GRIPHUS AERONAUTICAL ENGINEERING & MANUFACTURING LTD

Israel

EU Contribution

€ 100 000

TECHNISCHE UNIVERSITEIT DELFT

Netherlands

EU Contribution

€ 187 500

GOTTFRIED WILHELM LEIBNIZ UNIVERSITAET HANNOVER

Germany

EU Contribution

€ 112 500

GESELLSCHAFT FÜR PRAXISBEZOGENE FORSCHUNG UND WISSENSCHAFTLICHE LEHRE GGMBH

Germany

EU Contribution

€ 150 000

POLITECNICO DI MILANO

Italy

EU Contribution

€ 202 500

RIGAS TEHNISKA UNIVERSITATE

Latvia

EU Contribution

€ 150 000

RHEINISCH-WESTFAELISCHE TECHNISCHE HOCHSCHULE AACHEN

Germany

EU Contribution

€ 150 000

TECHNION - ISRAEL INSTITUTE OF TECHNOLOGY

Israel

EU Contribution

€ 202 500

COOPERATIVE RESEARCH CENTRE FOR ADVANCED COMPOSITE STRUCTURES LIMITED

Australia

Project information

Grant agreement ID: 282522

Status

Closed project

  • Start date

    1 February 2012

  • End date

    31 July 2015

Funded under:

FP7-SPACE

  • Overall budget:

    € 3 098 287,44

  • EU contribution

    € 1 997 700

Coordinated by:

DEUTSCHES ZENTRUM FUER LUFT - UND RAUMFAHRT EV

Germany

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