OPTIMISING STRUCTURAL FIBRE COMPOSITES BY HYBRIDISATION

Información del proyecto

Identificador del acuerdo de subvención: MA1E0098

Proyecto cerrado

Fecha de inicio 1 Abril 1989

Fecha de finalización 31 Marzo 1992

Financiado con arreglo a

• Research programme (EEC) on materials (raw materials and advanced materials) - Advanced materials (EURAM) -, 1986-1989

Coste total

Sin datos

Aportación de la UE

Sin datos

Coordinado por

LOUGHBOROUGH UNIVERSITY
United Kingdom

Objetivo

THE AIM OF THE PROJECT IS TO PRODUCE COST EFFECTIVE HIGH PERFORMANCE POLYMER COMPOSITES BY JUDICIOUS REINFORCEMENT AND MIXING (HYBRIDIZATION )0) OF BOTHHIGH AND LOW PERFORMANCE FIBRES IN THE SAME MATRIX SYSTEM.TO ACHIEVE THIS OBJECTIVE IT IS PROPOSED TO FABRICATE A SYSTEMATIC SERIES OF MIXED FIBRE(E-GLASS,CARBON,ARAMID,ETC.) COMPOSITES BASED SEPARATELY ON BOTH THERMOPLASTIC AND THERMOSETTING MATRICES.DETAILED STUDIES WILL THEN BE CARRIED OUT TO INVESTIGATE THE MECHANISMS BY WHICH LOADS ARE TRANSFERRED BETWEEN FIBRES AND MATRIX UNDER COMPRESSIVE,TENSILE AND FLEXURAL LOADING.THE FAILURE PROCESSES WILL BE QUANTIFIED BY SURFACE FRACTURE ANALYSIS,ACOUSTIC EMISSION,AND ELECTRONIC SPECKLE PATTERN INTERFEROMETRY TECHNIQUES.,ETC.THISWILL ALLOW THE DEVELOPMENT OF MATHEMATICAL MODELS TO PREDICT MECHANICAL BEHAVIOUR.THUS IN THE LONG TERM IT IS HOPED THAT THE PROJECT WILL PROVIDE DATA TO IDENTIFY NOVEL COST COMPETITIVE LIGHTWEIGHT HYBRID MATERIALS WITH IMPROVED BUCKLING RESISTANCE AND DAMAGE TOLERANCE.
The aim of the project is to produce cost effective high performance polymer composites by judicious reinforcement and mixing (hybridisation) of both high performance and low performance fibres in the same matrix system. To achieve this objective it is proposed to fabricate a systematic series of mixed fibre (E-glass, carbon, aramid, etc) composites based separately on both thermoplastic matrices and thermosetting matrices. Detailed studies will then be carried out to investigate the mechanisms by which loads are transferred between fibres and matrix under compressive, tensile and flexural loading. The failure processes will be quantified by surface fracture analysis, acoustic emission, and electronic speckle pattern interferometry techniques, etc. This will allow the development of mathematical models to predict mechanical behaviour. Thus in the long term it is hoped that the project will provide data to identify novel cost competitive lightweight hybrid materials with improved buckling resistance and damage tolerance.

Pressure/temperature conditions have been optimised for carbon fibre reinforced polypropylene composite production and glass fibre reinforced polypropylene composite production so that ply misalignment is minimised.

At this stage of reporting, all partners are actively involved in those aspects of the mechanical testing subprogrammes assigned to them. Thus data is now available on tensile, flexure, compression and falling weight impact behaviour. Early impressions are that some of the sample combinations are exhibiting synergistic hybrid effects in the sense that certain mechanical properties are not necessarily predictable in terms of the mechanical performance of their components (weighted in terms of their volume fractions present in the composite). Predictive behaviour models and graphs produced to represent falling weight impact behaviour, however, look very promising and initial examples are available for comparison purposes. Future repor ts will fully disseminate all the mechanical data and additional evidence provided by acoustic emission analyses and detailed fractographic examination will be used to refine and develop behavioural models and the prediction of optimum material combinations.
CURRENTLY,IN THIS FIRST STAGE OF THE PROJECT,THE PARTNERS HAVE BEEN REFINING COMPOSITE FABRICATION TECHNIQUES,AND PRODUCING THE FIRST SERIES OF SAMPLES FOR MECHANOICAL TESTING.TO THESE ENDS,PRESSURE/TEMPERATURE CONDITIONS HAVE BEEN OPTIMIZED FOR CARBON AND GLASS FIBRE REINFORCED POLYPROPYLENE COMPOSITE PRODUCTION SO THAT PLY MISALIGNMENT IS MINIMIZED;.SIMILARLY,A FILAMENT WINDING MACHINE WITH TWO CONTROL AXESHAS BEEN MODIFIED TO ALLOW PRODUCTION OF THERMOSETTING COMPOSITES WITH SYSTEMATICALLY VARYING LAY-UP GEOMETRIES AND VOLUME FRACTIONS.INITIAL COMMISSIONING TRIALS ON ACOUSTIC EMISSION EQUIPMENT HAVE SUCCESSFULLY PROGRESSED TO MODIFYING SOUND TRANSDUCERS SO THAT THEY CAN BE FITTED ON CRAG 400 COMPRESSION RIG SPECIMENS.THE COMPUTER MODELLING WORK AS BEEN STARTED WITH THE SOFTWARE FOR A DATA-BANK PROGRAMME WELL ADVANCED.

Ámbito científico (EuroSciVoc)

• ciencias naturales › informática y ciencias de la información › software
• ingeniería y tecnología › ingeniería de materiales › compuestos
• ciencias naturales › ciencias químicas › ciencia de polímeros
• ciencias naturales › matemáticas › matemáticas puras › geometría
• ciencias naturales › matemáticas › matemáticas aplicadas › modelo matemático

Programa(s)

• FP1-EURAM - Research programme (EEC) on materials (raw materials and advanced materials) - Advanced materials (EURAM) -, 1986-1989

Tema(s)

Datos no disponibles

Convocatoria de propuestas

Datos no disponibles

Régimen de financiación

CSC - Cost-sharing contracts

Coordinador

LOUGHBOROUGH UNIVERSITY

• Aportación de la UE: Sin datos
• Dirección: ASHBY ROAD ; LE11 3TU LOUGHBOROUGH ; Reino Unido
• Coste total: Sin datos

Participantes (3)

Centre Technique des Industries Mécaniques (CETIM)

Francia

• Aportación de la UE: Sin datos
• Dirección: 52 avenue Félix Louat ; 60304 Senlis
• Coste total: Sin datos

FOUNDATION FOR TECHNICAL AND INDUSTRIAL RESEARCH AT THE NORWEGIAN INSTITUTE OF TECHNOLOGY

Noruega

• Aportación de la UE: Sin datos
• Dirección: 1 D,Strindveien 4 ; 7465 TRONDHEIM
• Coste total: Sin datos

PRODUCTION ENGINEERING RESEARCH ASSOCIATION - PERA

Reino Unido

• Aportación de la UE: Sin datos
• Dirección: Technology Centre, Nottingham Road ; LE13 0PB MELTON MOWBRAY
• Coste total: Sin datos