Skip to main content
Przejdź do strony domowej Komisji Europejskiej (odnośnik otworzy się w nowym oknie)
polski pl
CORDIS - Wyniki badań wspieranych przez UE
CORDIS
Zawartość zarchiwizowana w dniu 2024-04-19

INNOVATIVE CONSTITUENTS FOR IMPROVING THE COMPRESSIVE STRENGTH OF LONG CARBON FIBRES/ORGANIC MATRIX COMPOSITES

Cel


This programme has contributed to understanding of various composites compressive failure modes, and to addressing quantitative requirements on identified key constituents. Experimental and theoretical developments have demonstrated that compression is clearly matrix dominated for composites made out of low inertia fibres such as High Strength and Intermediate Modulus carbon or such as glass. The 30% target has been shown to be directly dependent of an improved neat resin shear behaviour, by increasing preferentially the yielding strength, but also the modulus. The fibre/matrix interface shear load transfer ability appears to be of second order for compression. The initial fibres misalignment was also identified as an important parameter, which controls the filaments micro-buckling phenomenon. However, ICOMP experimental trials to install pre-tension in plies are not seen as industrially applicable. For designs driven by compression, the recomendations are to use product forms which minimize fibres waviness.

Therefore, propositions of innovative materials have been concentrated on new matrices development. As polymer experts have stated that the organic chemistry has probably reached an absolute limit with respect to shear properties, the introduction of fine particules in tough resins was investigated to match the shear behaviour requirements. An encouraging demonstration has been performed using a low class ductile polymer system. The addition of whiskers into the matrix increased both the neat resin strength and modulus, which enhanced the unidirectional composite compression in the forecast proportion. The lack of particules and resin optimisation, within ICOMP time frame, did not lead to an improved high class aeronautical material. However, this innovative route appears to be the only solution to combine prepregs processability, material cost and compression improvement. Furthermore, experimental indications suggested that this gain will directly be transposed into design criteria, such as compression after impact or compression of laminates containing a bolt, without degrading tensile properties and delamination resistance.

Dedicated inspection methods for in-situ damage monitoring or initial geometrical imperfections assessment were developed. A reliable compression test was a key preliminary request, which led to propose an innovative procedure to measure intrinsic unidirectional laminate compressive properties. The tremendous improvement brought by the new specimen has already been taken into account for future standards.
The main mechanical improvement of carbon fibre/organic matrix composites has been based for the last then years on high tensile strength fibres development. This research has led to a tremendous increase in composite tensile properties, but no significant progress has been noticed in compression, which often becomes the design limitation in complex structures. The preliminary work of this study is to develop a simulation tool to assess the raw materials influences on the compression failure modes of continuous fibres composites for high loaded structures. After a detailed analysis and an optimisation of the materials parameters, new constituents requirements will be addressed to a material manufacturer to improve the composites compression strength. Prototype composites will be elaborated out of innovative constituents (fibres and matrices) and the general properties will be checked to define their industrial potential. Independent works have suggested the key importance of the matrix in the composites compression behaviour. Because of chemistry difficulties to modify the resin mechanical characteristics without lowering the other properties such as hot/wet resistance, a goal of 30% increase in composites compression strength can be reasonably targeted.

Dziedzina nauki (EuroSciVoc)

Klasyfikacja projektów w serwisie CORDIS opiera się na wielojęzycznej taksonomii EuroSciVoc, obejmującej wszystkie dziedziny nauki, w oparciu o półautomatyczny proces bazujący na technikach przetwarzania języka naturalnego. Więcej informacji: Europejski Słownik Naukowy.

Aby użyć tej funkcji, musisz się zalogować lub zarejestrować

Program(-y)

Wieloletnie programy finansowania, które określają priorytety Unii Europejskiej w obszarach badań naukowych i innowacji.

Temat(-y)

Zaproszenia do składania wniosków dzielą się na tematy. Każdy temat określa wybrany obszar lub wybrane zagadnienie, których powinny dotyczyć wnioski składane przez wnioskodawców. Opis tematu obejmuje jego szczegółowy zakres i oczekiwane oddziaływanie finansowanego projektu.

Zaproszenie do składania wniosków

Procedura zapraszania wnioskodawców do składania wniosków projektowych w celu uzyskania finansowania ze środków Unii Europejskiej.

Brak dostępnych danych

System finansowania

Program finansowania (lub „rodzaj działania”) realizowany w ramach programu o wspólnych cechach. Określa zakres finansowania, stawkę zwrotu kosztów, szczegółowe kryteria oceny kwalifikowalności kosztów w celu ich finansowania oraz stosowanie uproszczonych form rozliczania kosztów, takich jak rozliczanie ryczałtowe.

CSC - Cost-sharing contracts

Koordynator

Dassault Aviation SA
Wkład UE
Brak danych
Adres
78 Quai Marcel Dassault
92214 Saint-Cloud
Francja

Zobacz na mapie

Koszt całkowity

Ogół kosztów poniesionych przez organizację w związku z uczestnictwem w projekcie. Obejmuje koszty bezpośrednie i pośrednie. Kwota stanowi część całkowitego budżetu projektu.

Brak danych

Uczestnicy (8)

Moja broszura 0 0