25.1.1-R2 INFLUENCE OF THE MANUFACTURING PARAMETERS ON MECHANICAL PROPERTIES OF POLYURETHANE BASED COMPOSITES

S.GLOGGNITZER (UNIVERSITY OF LEOBEN), T.BUCHSTEINER, G.PILZ

The investigations of manufacturing parameters temperature, pressure and curing time on the mechanical properties of polyurethane based composites showed basically a strong influence on the resulting laminate structure. Raising void content means reduced short term performance but enhanced fatigue behavior.

25.1.1-R4 FABRICATION OF COMPOSITE CYLINDERS WITH INTEGRATED LATTICE STRUCTURE USING FILAMENT WINDING

J.CERQUEIRA, H.FARIA (INEGI), R.FUNCK

In WASIS project, a wafer-like integrative concept was developed for an innovative aircraft fuselage. A fuselage section was manufactured through filament winding. Increasingly complex tools, process kinematics and control for accurate prototypes manufacturing were developed. Feasibility analysis is also addressed.

25.1.1-R5 ENHANCEMENT OF ELECTRICAL CONDUCTIVITY OF COMPOSITE STRUCTURES BY INTEGRATION OF CNTS VIA BULK RESIN AND/OR BUCKYPAPER FILMS

I.GAZTELUMENDI (TECNALIA), M.CHAPARTEGUI, R.SEDDON, S.FLÓREZ, F.PONS et al.

This work describes two approaches for the incorporation of Carbon Nanotubes in CFRP composites to improve electrical properties by infusion processing methods: through the addition of the CNTs in the bulk resin and by the addition of CNT-based buckypaper

25.1.1-R6 A ROBUST PROCEDURE FOR DAMAGE IDENTIFICATION IN A LATTICE SPACECRAFT STRUCTURAL ELEMENT BY MEAN OF STRAIN FIELD PATTERN RECOGNITION TECHNIQUES

A.GÜEMES (UPM-ETSIA), J.SIERRA, M.FROVEL, E.DEL OLMO, P.PINTADO

A high modulus CFRP lattice structure was manufactured by EADS-CASA Space. Several FBGs were bonded to measure strain during different tests. A robust procedure for damage detection based on PCA was used to identify defects in the structure.

25.1.1-R7 ALUMINA WHISKERS / BISMALEIMIDE COMPOSITES: PROCESSING STRATEGIES, STRUCTURE AND PROPERTIES

Z.MARTIN (EADS - INNOVATION WORKS), C.CERECEDO, V.VARCÁRCEL, XL.XOSÉC, AI.ARES

Development of a new bismaleimide(BMI)-based composite material by alfa-Alumina whiskers addition, with the purpose of reducing the brittleness at low temperatures and the composite residual stress, both phenomena related with the micro-crack nucleation. Structure and thermo-mechanical properties are investigated

25.1.2-R2 SELECTION OF LED OR CONVENTIONAL UV LAMP BASED ON THE COMPOSITE THICKNESS

I.TENA (MONDRAGON UNIBERTSITATEA), M.SARRIONANDIA, J.AURREKOETXEA, J.TORRE

This paper presents the comparison of the curing time and the interlaminar mechanical properties (ILSS) of a glass-fibre/polyester composite cured with UV LED and conventional flood UV lamp light sources based on composite thickness.

25.1.2-R4 MANUFACTURING AND TESTING OF COMPOSITE WAFER COMPONENTS WITH DUAL-PURPOSE INTEGRATED SEMI-LOOP JOINTS

S.KRYVENDA, F.GAGAUZ, M.SHEVTSOVA, L.SMOVZIUK (NATIONAL AEROSPACE UNIVERSITY “KHAI”), I.TARANENKO

Combination of wafer reinforcement concept and hybrid metal-to-composite joints provides sufficient reduction of aircraft fuselage weight. Within this work manufacturing process for curved CFRP wafer panel with integrated dual-purpose semi-loop hybrid joints is presented along with panels testing results discussion.

25.1.2-R5 ENHANCEMENT OF THERMAL AND ELECTRICALCONDUCTIVITY OF CFRP BY APPLICATION OF CARBON NANOTUBES

A.BOCZKOWSKA (WARSAW UNIVERSITY OF TECHNOLOGY), E.CIECIERSKA, M.KUBIŚ, P.CHABERA, T.WIŚNIEWSKI

The aim was to improve thermal and electrical conductivities of epoxy matrix, as well as CFRP. CNTs were applied as a filler and dispersed in epoxy using three roll milling. Nanocomposites with 0.05 - 1 wt.% were fabricated and studied.

25.1.2-R6 GRAPHENE NANOCOMPOSITES AS STRAIN-DAMAGE SENSOR

M.SANCHEZ (UNIVERSIDAD REY JUAN CARLOS), R.MORICHE, SG.PROLONGO, J.RAMS, A.UREÑA

Graphene filled epoxy composite can be used as strain sensor. The piezoresistive mechanism of the sensors with two different thickness nanoplatelets was studied analyzing the changes in the graphene network under tensile and flexural tests.

25.1.2-R7 MULTIFUNCTIONAL FIBER-REINFORCED PLASTICS WITH INTEGRATED TEXTILE-BASED SENSOR AND ACTUATOR NETWORKS

E.HAENTZSCHE (INSTITUE OF TEXTILE MACHINERY AND HIGH PERFORMANCE MATERIAL TECHNOLGY (ITM), TUD), A.KLUGE, A.NOCKE, C.CHERIF

In the context of our research activities, structurally integrated textile-based sensors and actuators within the reinforcements of further fiber-reinforced composites, e.g. FRPs and membranes - for structural health monitoring tasks and kinematic functionalities respectively - have been developed and investigated.

25.1.3-R2 FORMING SIMULATIONS OF MULTI-LAYERED WOVEN PREFORMS ASSEMBLED WITH STITCH YARNS

S.CHEN (THE UNIVERSITY OF NOTTINGHAM), A.ENDRUWEIT, L.HARPER, N.WARRIOR

An explicit FE-approach is presented to predict the forming behaviours of multi-layered woven preforms with localised stitching.Stitch-bonded fibrous reinforcements have been modelled as multi-layered continua with additional through-thickness fixations.The influence of local stitch-bonds has been highlighted to facilitate automatic manufacturing.

25.1.3-R4 TESTING AND ANALYSIS OF GRID-STIFFENED COMPOSITE STRUCTURAL PANELS

A.HAJDAEI, S.GIANNIS (ELEMENT MATERIALS TECHNOLOGY), V.MATEJAK, A.TOULITSIS

A composite fuselage structure has been developed in WASIS project based on the lattice stiffening concept. To understand the mechanical performance and validate the design methodology a testing programme involving structural parts of different levels of complexity was executed.

25.1.3-R5 CONTRIBUTION TO THE IMPROVEMENT OF SHIELDING EFFECTIVENESS OF COMPOSITE MATERIALS

JC.WALRICK (ESTACA CAMPUS OUEST), S.GILLET, M.BENZEGGAGH

This work is devoted to characterize the shielding effectiveness of carbon black filled composite material reinforced with glass and carbon fibers.In the first step, the realization of the material is proposed using two processes of manufacturing namely infusion and RTM

25.1.3-R6 FUNCTIONAL COMPOSITE FIBRES WITH CARBON NANOPARTICLES

S.GAO (LEIBNIZ-INSTITUT FÜR POLYMERFORSCHUNG DRESDEN E. V., DRESDEN, GERMANY), D.YIN-HU, L.JIAN-WEN, E.MÄDER, G.HEINRICH

A simple ‘coffee ring’ approach is developed to deposit graphene nanoplatlets (GNPs) and multiwalled carbon nanotube networks (CNTs) onto glass fibre surfaces. A single glass fibre shows multifunctional responsibilities for sensing temperature, relative humidity (RH) and nanoscale liquid-solid phase transitions.

25.1.3-R7 SCALABLE PROCESSING OF MULTIFUNCTIONAL NANOTUBE/FIBER HYBRID COMPOSITES

Q.AN, E.THOSTENSON (UNIVERSITY OF DELAWARE), A.RIDER

Hybridization of micro and nano reinforcement scales offers tremendous opportunity to tailor the properties of fiber composites. Electrophoretic deposition, where nanotubes are electrically deposited onto fabric from a water-based solution, was used to create composites with significantly improved shear strength.

25.1.4-R2 COMPRESSIBILITY AND PERMEABILITY OF FIBER REINFORCEMENTS FOR PULTRUSION

R.BEZERRA (FRAUNHOFER ICT), F.WILHELM, F.HENNING

The aim of this experimental work is to characterize fiber reinforcements typically used in the pultrusion process, i.e. rovings and continuous filament mats in terms of compressibility and in-plane permeability.

25.1.4-R4 ON THE SAFETY ASSESSMENT AND DAMAGE TOLERANCE OF COMPOSITE LATTICE TYPE AEROSPACE STRUCTURES

A.KOTZAKOLIOS (UNIVERSITY OF PATRAS), D.VLACHOS, K.ANTONIADIS, V.KOSTOPOULOS

In this work, impact and damage response of composite wafer structures is numerically modeled. The damage created on the structure is identified and the reduction of the airworthiness of the structure is investigated. Comparisons are made with conventional composite structures.

25.1.4-R5 EXPERIMENTAL AND THEORETICAL STUDY ABOUT ELECTRICAL AND THERMAL PROPERTIES OF CARBON FIBER MAT REINFORCED THERMOPLASTICS

S.YAMASHITA (THE UNIVERSITY OF TOKYO), I.OHSAWA, J.TAKAHASHI

In this study, some experiments and theoretical study were performed to clarify the fundamental features about electrical and thermal properties of CF/PP (carbon fiber reinforced polypropylene) developed in Japanese national project, especially about CMT (carbon fiber mat reinforced thermoplastics).

25.1.4-R6 NOVEL STRUCTURAL HEALTH MONITORING FOR COMPOSITE STRUCTURES BY USING SMART PAINT SENSOR BASED ON CARBON NANO HYBRID COMPOSITES

I.KANG (PUKYONG NATIONAL UNIVERSITY), SH.PARK, GR.CHOI, JY.JUNG, H.HUH et al.

To address the need of structural health monitoring (SHM) for composite structures, this paper presents a novel sensing technique based nano smart paint which can monitor impact and structural deterioration.

25.1.4-R7 ANALYSIS OF THE FILTRATION PHENOMENA DURING RTM MANUFACTURING OF MULTISCALE CARBON FIBER COMPOSITES WITH CNT DOPED EPOXY RESINS

A.UREÑA (UNIVERSIDAD REY JUAN CARLOS), B.GIL, SG.PROLONGO, M.CAMPO, M.SANCHEZ et al.

Present contribution analyzes the different filtering mechanisms that occur during resin transfer molding of a CNT doped epoxy resin into a carbon fiber preform. Two filtering mechanisms were indentified, which have been identified as deep bed filtration and cake filtration.