24.3.1-R1 DEVELOPMENT OF POLYIMIDE ADHESIVE FILM AND THE APPLICATION TO HIGH TEMPERATURE SANDWICH PANELS

S.AYABE (TOKYO UNIVERSITY OF SCIENCE), T.OGASAWARA, Y.ISHIDA, Y.KOGO

This paper presents processing and properties of a carbon/polyimide-composite /carbon-foam-core sandwich panel. Polyimide film adhesive was also developed. It has been demonstrated that the sandwich panels exhibit excellent flatwise-tensile strength and three-point flexural strength up to 300C.

24.3.1-R2 DISPERSION OF GRAPHENE USING THE ELECTROSTATIC REPULSION FORCE IN THE GRAPHENE REINFORCED EPOXY COMPOSITES

HJ.OH (CHONBUK NATIONAL UNIVERSITY), HY.HWANG, SS.KIM

In this work, a simple dispersion method with electrostatic repulsion force by using electrospray technique was proposed. The graphene-dispersed epoxy composites were fabricated with respect to the different voltage conditions and the particle volume fraction.

24.3.1-R3 VERIFICATION OF UTILITY OF FINITE ELEMENT MODEL FOR MICROSCOPIC DAMAGE SIMULATION OF A FIBER-REINFORCED CERAMIC MATRIX COMPOSITE

R.KITAMURA (YAMAGUCHI UNIVERSITY), K.GODA

In this study, a new finite element model is proposed, in which the interfacial debonding is taken into account. The accuracy of the model was validated by comparing with the general-purpose finite element analysis software and theoretical matrix crack model.

24.3.1-R4 QUANTIFYING THE ORIENTATION OF THE REINFORCEMENT IN COMPOSITES: FROM MODEL MATERIALS TO BULK NANOCOMPOSITES

Z.LI (THE UNIVERSITY OF MANCHESTER), R.YOUNG, I.KINLOCH, A.MARSDEN, N.WILSON

Polarized Raman spectroscopy is used to quantify the orientation of graphene. The Raman band intensity and the angle between laser polarization and graphene follow a form of I = C1(cos(theta))^4 + C2, with a higher C2 for a poorer orientation.

24.3.1-R5 THERMO-MECHANICAL DAMAGE DUE TO LIGHTNING IMPACT IN CARBON/EPOXY COMPOSITES: EXPERIMENTS AND SIMULATIONS

C.GONZÁLEZ (IMDEA MATERIALS INSTITUTE AND POLYTECHNIC UNIVERSITY OF MADRID), S.DELGADO, F.SKET, J.LLORCA, DY.WANG et al.

The thermo-mechanical damage induced in a composite panel by a lighting impact is analyzed using the finite element model. The simulation results are compared with experiments.

24.3.1-R6 FABRICATION OF CNTS GRAFTED HIERARCHICAL MULTISCALE COMPOSITE AND EVALUATION OF ITS MECHANICAL PROPERTIES

T.KIM (GRADUATE SCHOOL OF WASEDA UNIVERSITY), M.KAMEYA, J.NATORI, H.KAWADA

CNTs were grafted onto carbon fibers using Ni deposited film as the catalyst, and their interfacial properties were evaluated for the purpose of figure out the significant effect of CNTs introduced at the fiber/resin interface in CFRP laminates.

24.3.1-R7 MULTI-SCALE MODELING OF 3D WOVEN STRUCTURES FOR MECHANICAL PERFORMANCE

B.ELSAID (UNIVERSITY OF BRISTOL), D.IVANOV, AC.LONG, SR.HALLETT

An integrated modelling framework for 3D woven structures is presented. An initial multi-scale kinematic modelling phase is employed to predict the defects and deformation occurring during weaving and compaction of preforms before submission to a multi-scale mechanical modelling phase.

24.3.2-R1 EXPERIMENTAL STUDY OF COMPOSITE-TO-STEEL ADHESIVE JOINTS WITH LASER TREATED SURFACES

KA.KALTEREMIDOU, N.TSOUVALIS (NATIONAL TECHNICAL UNIVERSITY OF ATHENS), N.OTERO, P.ROMERO, I.COTO et al.

An experimental parametric study of adhesively bonded double strap CFRP/steel joints is presented. Two conventional and two laser texturing surface preparation methods, as well as two different overlap lengths are considered.

24.3.2-R2 FLEXIBLE & AUTOMATED PRODUCTION OF COMPOSITE PARTS

C.BRECHER, A.KERMER-MEYER (FRAUNHOFER INSTITUTE FOR PRODUCTION TECHNOLOGY IPT), M.EMONTS

The combination of laser-assisted tape placement and thermoforming enables the production of tailored components in various shapes and lot sizes by exploiting the synergies of efficient primary shaping and reshaping technologies. This was demonstrated by Fraunhofer IPT in »FibreChain«.

24.3.2-R3 FABRICATION AND MECHANICAL EVALUATION OF ALIGNED MULTI-WALLED CARBON NANOTUBE SHEET/ALUMINA LAMINATED CERAMIC COMPOSITES

G.YAMAMOTO (TOHOKU UNIVERSITY), K.SHIRASU, Y.NOZAKA, Y.SHIMAMURA, Y.INOUE et al.

Aligned MWCNT sheet/alumina laminated composites were prepared for the first time. Introduction of the aligned MWCNT sheet was an effective approach to deflect cracks preventing catastrophic failure, leading to improvement in fracture toughness and work required to break the composites.

24.3.2-R4 A MOLECULAR DYNAMICS STUDY OF POLYMER/GRAPHENE NANOCOMPOSITES

V.HARMANDARIS (UNIVERSITY OF CRETE), A.RISSANOU

We present results through atomistic simulations of graphene based polymer nanocomposites. We observe the structural, conformational and dynamical properties of the polymer chains diversify form their corresponding bulk behavior, as a function of the distance from the graphene layer.

24.3.2-R5 SIMULATION OF LIGTHNING STRIKE ON COMPOSITE LAMINATES : INFLUENCE OF THE MATRIX PYROLYSIS ON THE TEMPERATURE FIELD

C.HUCHETTE (ONERA THE FRENCH AEROSPACE LAB), J.RANNOU, P.BEAUCHÊNE, L.CHEMARTIN

A magneto-hydrodynamic model of the lightning channel has been developed at Onera and is used as boundary conditions in simulations of lightning strike on composite material. Qualitative results are presented to illustrate the importance of matrix pyrolysis in FE simulation.

24.3.2-R6 FRACTURE TOUGHNESS OF CARBON FIBER COMPOSITES BASED ON MODIFIED EPOXY CARBON NANOTUBES

N.KCHIT (NANOCYL S.A), D.BONDUEL, M.CLAES

Carbon nanotubes (CNT) possess excellent intrinsic characteristics like exceptionally high mechanical and conductive properties which makes them the prime candidate to reinforce high performance composite structures

24.3.2-R7 MESOSCOPIC FINITE ELEMENT SIMULATION OF THE MECHANICAL BEHAVIOR OF WOVEN DRY FABRICS

A.WENDLING (PRISME LABORATORY), H.GILLES, JE.ROCHER, J.GILLIBERT, JL.DANIEL et al.

The goal of this study is to identify the behaviour law of the homogeneous material equivalent to a fibrous material to feed mesoscopic finite elements simulations of dry fabrics unit-cell

24.3.3-R1 COST EFFICIENT METAL TO FIBRE REINFORCED COMPOSITE JOINING

R.THAKKAR (LKR LEICHTMETALLKOMPETENZZENTRUM RANSHOFEN GMBH), S.UCSNIK

A cost and time efficient conceptual Metal to Fiber Reinforced Plastic (FRP) joining by through thickness metallic pin reinforcement is proposed. Verification of the proposed methodology has been carried out by performing preliminary tests on the produced coupons.

24.3.3-R2 NUMERICAL AND EXPERIMENTAL ANALYSIS OF COMPOSITE TUBES UNDER EXTERNAL HYDROSTATIC PRESSURE

S.PAVLOPOULOU (UNIVERSITY OF MANCHESTER), R.SCHANKHACHUR, P.POTLURI

E-fibre glass laminated pre-preg, filament wound and braided tubes were tested to destruction under hydrostatic external pressure loading in order to study their buckling and crushing behaviour.

24.3.3-R3 THE ROLES OF GEOMETRY AND TOPOLOGY STRUCTURES OF GRAPHITE FILLERS ON THERMAL CONDUCTIVITY OF GRAPHITE/ALUMINUM COMPOSITES

C.ZHOU, D.CHEN, X.ZHANG, Z.CHEN, J.GANG (UNIVERSITÉ LILLE 1, 59655 VILLENEUVE D'ASCQ, FRANCE) et al.

Highly thermally conductive graphite flakes/Si/Al composites have been successfully fabricated by an optimized pressure infiltration process for thermal management applications. High-resolution transmission electron microscopy was used to reveal nanoscale interface configurations which should be responsible for thermal properties enhancement.

24.3.3-R4 TAILORING OF ELECTRO-MECHANICAL PROPERTIES OF GRAPHENE REINFORCED TEMPLATED COMPOSITES

N.HEEDER, A.YUSSUF, I.CHAKRABORTY, M.GODFRIN, A.SHUKLA (UNIVERSITY OF RHODE ISLAND) et al.

A capillary-driven particle level templating technique was utilized to disperse graphene nanoplatelets within a polystyrene matrix to form multi-functional composites with tailored electro-mechanical properties. Results showed that the properties of the composites can be easily tailored for a target application.

24.3.3-R5 DESIGN OF MECHANICAL IMPACT TESTS EQUIVALENT TO LIGHTNING STRIKES

F.SOULAS (AIRBUS GROUP INNOVATIONS), C.ESPINOSA, F.LACHAUD, Y.DUVAL, S.GUINARD et al.

Lightning strikes of composite materials induce two distinct kinds of direct effects: surface and bulk mechanical damage which are very close from impact tests observed damage. We propose a method to design mechanical impact tests representative of lightning tests.

24.3.3-R6 EIGENPROBLEMS FOR SELECTED NANOSTRUCTURES EMBEDDED IN A MATRIX

A.BANAS (CRACOW UNIVERSITY OF TECHNOLOGY), A.MUC

An analytical method of the solution of the governing nonlinear eigenproblem is proposed. It can be applied into the analysis of eigenstates in quantum mechanics. The eigenstates for specific quantum dots are derived. The solved 2D&3D examples are presented.

24.3.3-R7 TEXTILE COMPOSITE REINFORCEMENT FORMING ANALYSIS CONSIDERING OUT-OF-PLANE BENDING STIFFNESS AND TENSION DEPENDENT IN-PLANE SHEAR BEHAVIOR

M.NISHI (JSOL CORPORATION), T.HIRASHIMA, T.KURASHIKI

We propose an FE model for textile reinforcement forming simulation in order to predict wrinkle accurately. The proposed model can express out-of-plane bending stiffness by shell and membrane combined model and tensile dependent in-plane shear behavior by a micromechanical model.

24.3.4-R1 ADVANCED MANUFACTURING ROUTES FOR METAL/COMPOSITE COMPONENTS FOR AEROSPACE

M.SALVO (POLITECNICO DI TORINO), A.ADMACOM TEAM

The aim of ADMACOM (Advanced manufacturing routes for metal/composite components for aerospace) project is to develop innovative manufacturing technologies based on advanced design of interfaces and of joining materials for aerospace components.

24.3.4-R2 PRODUCTION METHOD EVALUATION FOR LARGE CYLINDRICAL COMPOSITE PARTS UNDER A COST PERSPECTIVE

K.HOREJSI (FACC AG - UNIVERSITY OF LEOBEN), G.SCHNEIDERBAUER, J.TAUCHNER, R.SCHLEDJEWSKI, J.NOISTERNING

A major challenge in composite design and manufacturing is accurate cost estimation. it can be shown, that material price and secondary bonding operations are critical cost drivers.

24.3.4-R3 EFFECT OF THE TIC PARTICLE SIZE ON THE EXTRUSION OF 7075 ALUMINIUM MATRIX COMPOSITE

P.REY RODRIGUEZ (AIMEN), SA.CRUZ, M.CABEZA, M.LIEBLICH, P.MERINO

In this study aluminium matrix composites were produced with pre-alloyed AA7075 powders and TiC nano and micrometric reinforcement particles by mechanical alloying and extrusion laboratory and pilot plant using circular and L dies respectively, evaluating the mechanical properties and microstructure.

24.3.4-R4 GRAPHENE AND ITS APPLICATIONS IN POLYMER COMPOSITES

S.FLÓREZ (TECNALIA), M.CHAPARTEGUI, I.BUSTERO, I.GAZTELUMENDI, M.MENDIZÁBAL et al.

This paper looks at the development of graphene nanocomposites and CFRP laminates with conductive properties. Different qualities of graphene have been characterized and tested for dispersion in polymer matrixes.High improvements in the thermal conductivity for both applications have been achieved

24.3.4-R5 DIAGNOSTICS OF DAMAGED COMPOSITE SKIN ZONES OF AIRCRAFT AFTER THE IMPACT OF LIGHTNING BOLT USING THE METHOD OF ACOUSTIC EMISSION

A.URBAHS, M.BANOVS, S.BRATARCHUK (RIGA TECHNICAL UNIVERSITY INSTITUTE OF AERONAUTICS), P.SEREBRJAKOVS, V.TURKO

The object of diagnostics is Sukhoi Superjet-100 elevator. The elevator skin is made of composite polymer. The results of research show that application of the Acoustic Emission testing method is rational way for composite material non-destructive testing in civil aviation.

24.3.4-R7 DAMAGE ANALYSIS BASED ON THE CORRELATION BETWEEN ACOUSTIC EMISSION AND E MODULUS DEGRADATION IN FLAX/EPOXY QUASI UNIDIRECTIONAL WOVEN LAMINATES

M.KERSANI (1-UNIVERSITY OF SCIENCE AND TECHNOLOGY HOUARI BOUMEDIENE, ALGIERS ALGERIA 2- . KATHOLIC UNIVERSITEI), SV.LOMOV, AW.VER VUURE, A.BOUABDALLAH, I.VERPOEST