Objective
THE THERMOMECHANICAL BEHAVIOUR OF CFRP STRUCTURES DEPENDS DIRECTLY ON THE THERMAL STABILITY OF THE MATRIX WHICH LIMITS THE OPERATION TEMPERATURE. THE AIM OF THIS R&D PROJECT IS THE REALISATION OF ADVANCED COMPOSITES MATERIALS ON THE BASIS OF HEAT-RESISTANT CARBON FIBRES NEW THERMOSTABLE MATRIXES.
The project aims at optimising a continuous carbon fibre composite material for use at elevated temperatures (250 C). The matrix is a thermostable bismaleimide (BMI) of the newest generation. It is designed for processing composites by a hot melt route and giving tacky and drapable prepregs.
The resin formation, the processing conditions (impregnation and cure) as well as the sizing material which first coats the fibres will be studied and optimised. The standard sizing material (epoxy based) has a lower thermostability than the matrix and it may weaken the interfacial region at elevated temperatures. New sizing materials will be evaluated for improving composite overall thermostability while preserving the other properties. The manufacture of a prototype part (to be determined) should close the project.
BMIs are interesting candidates for high temperature applications but suffer from relative brittleness because of their highly crosslinked structure.
The optimisation of carbon fibre composites shows that the property transposition from BMI resins to composites depends in large measure on the processing route.
Unfortunately, thermostable sizing (exhibiting the same thermostability as the resin) developed and optimised in this project does not retain the same level of properties as epoxy sizing. It dissolves during impregnation with the matrix. It has been found that it can contribute to the processability as well as to the end use properties of the composite by modifying the region of the interface with the fibres.
High level thermomechanical properties were also shown. However, the increasing thermostability comes with decreasing toughness.
The new biphasic high temperature thermoset proposed by Rhone-Poulenc gives a marked improvement in fracture toughness.
THE SUBJECTS OF THE PROJECT ARE:
- REALISATION OF PREPREGS ON THE BASIS OF STANDARD CARBON FIBRES (SIZED AND UNSIZED) AND STANDARD RESIN.
- CHARACTERISATION OF THE MICROSTRUCTURES AND MECHANICAL PROPERTIES.
- MODIFICATION OF THE FIBRE-MATRIX INTERFACE (NEW SIZING AND RESINS)
- DEVELOPMENT OF PLATES.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: https://op.europa.eu/en/web/eu-vocabularies/euroscivoc.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: https://op.europa.eu/en/web/eu-vocabularies/euroscivoc.
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Programme(s)
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Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
92097 Paris la Défense
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.