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Development of a lifing methodology for ceramic matrix composites in aero gas turbine engines

Objective



Objectives and content:

Cost, performance, weight and emissions requirements for future aero gas turbines require increased temperatures without reducing component reliability. Only ceramic materials can offer a significant increase in material temperature capability in an oxidising environment, and in order to maintain damage tolerance and reliability these need to be used in the form of continuous fibre reinforced ceramic matrix composites.

However, introduction of:
Such materials into future engine development programs requires good prediction of the component integrity and life to be made before expensive engine tests are performed. Production application requires guaranteed component lives well beyond the experiences, which can be gained in development engines. At present, component lives can only be estimated by crude comparison with fatigue and stress rupture databases. No allowance can be made for progressive damage, multiaxial loading, and thermal cycling. This project is concerned with the identification of design criteria for these materials and the development and validation of a material model to permit the lifting of CMC components in aero gas turbines.

The practical objectives of this research project are: Assessment of the life limiting degradation mechanisms under representative service conditions for examples of Oxide and Non-Oxide fibre based CMCs. Generation of a reliable mechanical property database covering representative engine/cyclic lives. Identification of design criteria. Development and validation of a life prediction model.

These objectives will be tackled in six interlined tasks: Procurement and characterisation of material. Performance testing. Investigation of deformation and damage mechanisms. Development of a constitutive and lifetime prediction model. Validation of the model. Assessment of the applicability of the model to possible non-aero spin-offs. The consortium brings together seven partners plus one major subcontractor. The five industrial partners include four aero and one industrial gas turbine manufacturer who are committed to exploiting the results of the project in the design of CMS components to improve the competitiveness of their products, thereby maintaining the market share obtained by the European industry. They are complemented by two of the leading research organisations in the field. BE97-4020

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Rolls Royce PLC
Address
Elton Road
DE24 8BJ Derby
United Kingdom

Participants (7)

ANSALDO RICERCHE SPA*
Italy
Address
Corso Perrone 25
16152 Genova
BMW Rolls-Royce GmbH - Aeroengines
Germany
Address
11,Eschenweg
15827 Dahlewitz
CENTRO DE ESTUDIOS E INVESTIGACIONES TECNICAS DE GUIPUZKOA
Spain
Address
15,Paseo De Manuel De Lardizabal 15
20009 San Sebastian
Commission of the European Communities
Netherlands
Address
3,Westerduinweg
1755 ZG Petten
INDUSTRIA DE TURBO PROPULSORES SA
Spain
Address
300,Parque Technologico 300
48170 Zamudio
MTU Motoren- und Turbinen-Union München GmbH
Germany
Address
665,Dachauer Strasse
80995 München
QINETIQ LIMITED
United Kingdom
Address
85 Buckingham Gate
London