23.1.1-R2 NON-CRIMP FABRICS GEOMETRICAL VARIABILITY AND ITS INFLUENCE ON COMPOSITES CURE

A.MESOGITIS (CRANFIELD UNIVERSITY), A.SKORDOS, AC.LONG

A framework is developed and implemented to characterize and model in plane fibre misalignment in Non-Crimp fabrics (NCF). Image analysis based on fast Fourier Transform and correlation analysis is used to characterise fibre misalignment in a carbon fibre ±45º NCF.

23.1.1-R4 CYCLOOLEFIN COPOLYMER NANOCOMPOSITES EXPANDED THROUGH SUPERCRITICAL CARBON DIOXIDE

A.DORIGATO, M.SCHINTU, A.PEGORETTI (UNIVERSITY OF TRENTO - ITALY)

A cycloolefin-copolymer was compounded with fumed silica nanoparticles, and foamed through supercritical carbon dioxide. Quasi-static and creep tensile tests on bulk and foamed nanocomposites evidenced a positive effect played by nanosilica in improving stiffness, strength and creep stability.

23.1.1-R5 COMPARISON OF LOW VELOCITY IMPACT BEHAVIOUR OF THERMOPLASTIC COMPOSITES REINFORCED WITH GLASS AND BASALT WOVEN FABRICS

G.SIMEOLI, D.ACIERNO, L.SORRENTINO (NATIONAL RESEARCH COUNCIL - ITALY), S.IANNACE, F.SARASINI et al.

The interface strength of woven basalt and woven glass/polypropylene laminates has been managed to tailor quasi-static flexural and low velociy impact properties. The reduction of the interface strength allows further dissipative mechanisms (fibre splitting, larger fibre and matrix deformations, frictions).

23.1.1-R6 REGENERATION OF THERMALLY RECYCLED GLASS FIBRE FOR COST-EFFECTIVE COMPOSITE RECYCLING: OVERVIEW OF THE RECOVER PROJECTS

JL.THOMASON (UNIVERSITY OF STRATHCLYDE), L.YANG, CC.KAO, P.JENKINS, E.SÁEZ RODRIGUEZ et al.

Development of economically viable processes for recycling glass fibre composites would have major economic and environmental impacts. This presentation introduces the ReCoVeR projects on enabling cost-effective performance regeneration of glass-fibres from thermal recycling of end-of-life automotive and wind energy composites.

23.1.1-R7 CHINESE PUZZLES OF TEXTILE COMPOSITES PROPERTIES

SV.LOMOV (KU LEUVEN), I.VERPOEST

The paper presents an integrated research approach to textile composites: properties of the same material are studied through all the stages of its production and performance ("Chinese puzzle") - for non-crimp fabric and 3D woven glass and carbon composites

23.1.2-R2 DETERMINATION OF THE MODEL COMPLEXITY LEVEL REQUIRED TO PREDICT THE CURE-INDUCED DEFORMATIONS IN THERMOSET-BASED COMPOSITE PARTS

A.PARMENTIER (CENAERO), B.WUCHER, D.DUMAS

The present study aims at determining the numerical model complexity level allowing to predict the cure-induced deformations with sufficient accuracy and reduced computational cost at the same time. A minimum effort in the model complexity already give a robust model.

23.1.2-R4 GRAPHENE BASED POLYMER NANOCOMPOSITES: CHEMICAL INCORPORATION STRATEGIES AND PROPERTY ENHANCEMENT

H.SALAVAGIONE (CSIC), M.CASTELAIN, P.SHUTTLEWORTH, G.MARTÍNEZ, M.GÓMEZ-FATOU et al.

Covalent routes to connect graphene with polymers represent a versatile alternative to conventional mixing methods for the development of novel composite materials. Synthetic strategies for covalent modification of graphene with simple molecules and with polymers will be presented.

23.1.2-R5 PERFORMANCE OF COMPOSITE PLATES AFTER MULTI-SITE IMPACTS

S.PSARRAS (IMPERIAL COLLEGE LONDON), M.GHAJARI, P.ROBINSON, L.IANNUCI

Sequential multi-site impacts were performed on CFRP composite plates with different thicknesses and the compression after impact behaviour was investigated. These were compared with a Finite Element model that was developed using continuum shell elements and layers of cohesive elements.

23.1.2-R6 REGENERATION OF THERMALLY RECYCLED GLASS FIBRE FOR COST-EFFECTIVE COMPOSITE RECYCLING: FUNDAMENTAL STUDY OF STRENGTH LOSS OF THERMALLY CONDITIONED GLASS FIBRE

P.JENKINS (UNIVERSITY OF STRATHCLYDE), L.YANG, JL.THOMASON, JJ.LIGGAT, SJ.HINDER et al.

It was found by application of a novel single fibre thermal conditioning method that the strength of heat treated E-glass fibre is, in some cases, underestimated. The critical strength loss range of 400-500°C was investigated using various analytical techniques.

23.1.2-R7 STOCHASTIC MODELLING OF THE EFFECT OF YARN PATH AND LAYER SHIFT VARIABILITY ON STIFFNESS AND STRENGTH OF TEXTILE COMPOSITES

M.MATVEEV (THE UNIVERSITY OF NOTTINGHAM), AC.LONG, A.JONES

This study presents a stochastic approach for modelling the effect of yarn path and layer shift variability on stiffness and strength of textile composites.

23.1.3-R2 DLR MODULAR FREE-SHAPEABLE CNG-TANK - A HYBRID, COMPOSITE-INTENSIVE DESIGN

D.SCHIERLE (DLR E.V.), HE.FRIEDRICH

In the automotive industry, natural gas is currently stored as Compressed Natural Gas in cylindrical tanks. The Institute of Vehicle Concepts at the German Aerospace Center is developing an innovative, lightweight, composite-intensive design for a modular and free shapeable tank.

23.1.3-R4 UNDERSTANDING THE INTERFACIAL INTERACTIONS IN SILICA REINFORCED POLYPROPYLENE NANOCOMPOSITES

D.PEDRAZZOLI (UNIVERSITY OF TRENTO & GEORGIA INSTITUTE OF TECHNOLOGY), A.PEGORETTI, K.KALAITZIDOU

Mr. Diego Pedrazzoli has completed his graduate studies in Mechatronics Engineering at the University of Trento (Italy) and started his Ph.D. there. His research is mainly focused on understanding the mechanical and interfacial properties in polymer nanocomposites and fiber composites.

23.1.3-R5 STUDY OF LOW VELOCITY IMPACT DEFECTS IN ORGANIC INTERLOCK WOVEN COMPOSITE

A.ELIAS (ONERA), M.KAMINSKI, F.LAURIN, L.GORNET

Impact tests at different energies were performed on interlock woven composites and analyzed using microscopic observations in order to understand damage mechanisms occurring in these materials. Finite element simulations were performed using the continuum damage model ODM for woven composites

23.1.3-R6 REGENERATION OF THERMALLY RECYCLED GLASS FIBRE FOR COST-EFFECTIVE COMPOSITE RECYCLING: INCREASING THE STRENGTH OF THERMALLY CONDITIONED GLASS FIBRES BY HF TREATMENT

L.YANG (UNIVERSITY OF STRATHCLYDE), E.SÁEZ RODRIGUEZ, JL.THOMASON

The results of an extensive study are presented of regenerating performance of thermally conditioned and recycled glass fibre using hydrofluoric acid (HF). A significant increase of fibre strength was obtained and strengthening mechanism was associated with HF etching.

23.1.3-R7 ELASTO-PLASTIC SINGLE FIBER PULLING OUT OF MATRIX WITH FRICTION

O.KONONOVA (RIGA TECHNICAL UNIVERSITY), A.KRASNIKOVS, A.KHABBAZ, J.VARNA

Experimetal and numerical modeling program for single steel fiber pull out of concrete (or epoxy) matrix was realized. Micromechanical parameters were obtained.

23.1.4-R2 EVALUATION OF FLOWABILITY OF THERMOPLASTIC CARBON FIBER COMPOSITES FOR COMPRESSION MOLDINGS

T.ISHIKAWA (MITSUBISHI RAYON CO., LTD.), H.OGASAWARA, M.TOMIOKA

The thermoplastic carbon fiber composites which have high flowability is presented. The composite consists of regularly piled unidirectional prepregs which have slits to cut continuous fibers. The specific slit design improves flowability and the compression molding requires low pressure.

23.1.4-R5 EFFECT OF TRANSVERSE DAMAGE ON COMPRESSIVE STRENGTH IN FIBER DIRECTION FOR CFRP

G.EYER (LMA CNRS), C.HOCHARD, O.MONTAGNIER, JP.CHARLES

Influence of damage on compressive strength in fiber direction for CFRP is investigated by an experimental approach. Firstly, sample validation is focused to exclude structural collapse. Next damaged tubes are studied to show the loss of compressive strehgth.

23.1.4-R6 REGENERATION OF THERMALLY RECYCLED GLASS FIBRE FOR COST-EFFECTIVE COMPOSITE RECYCLING: INCREASING THE STRENGTH OF THERMALLY CONDITIONED GLASS FIBRES USING COST EFFECTIVE RECOVER TREATMENTS

E.SÁEZ RODRIGUEZ (UNIVERISTY OF STRATHCLYDE), L.YANG, JL.THOMASON

The paper reports an extensive study on the regenerating performance of thermally treated GFs using two different treatments routes. The effectiveness of different treatments was investigated on strength recovery of GFs thermally treated, achieving up to 200% increase

23.1.4-R7 STOCHASTIC MULTI-SCALE MODELLING OF SHORT- AND LONG-RANGE EFFECTS IN TEXTILE COMPOSITES BASED ON EXPERIMENTAL DATA

A.VANAERSCHOT (KU LEUVEN), BN.COX, SV.LOMOV, D.VANDEPITTE

Realistic virtual textile composites are generated in the WiseTex format. Each specimen possesses the short- and long-range variability, characterised from experiments, using average trends combined with zero-mean deviations. Different geometry generator techniques are applied to simulate the correlated tow path.