26.1.1-R8 COMBINED ELECTRON POST-CURING AND SURFACE FUNCTIONALIZATION OF FIBRE-REINFORCED THERMOSET PARTS AS AN EFFECTIVE COATING PRE-TREATMENT PROCESS

M.GEDAN-SMOLKA (IPF DRESDEN), U.GOHS, A.MÜLLER, F.MIERSCH, A.CALVIMONTES

Alternatively to conventional In-mold-coating or primer application SMC-molded parts were modified by electron treatment prior to subsequent coating processes. The procedure resulted in a barrier-layer with surface hydrophilization.Initial assessment of suitable facility parameters showed the In-line compatibility of this technology.

26.1.1-R9 MODELLING CARBON NANOTUBE “BRIDGES” IN UNIDIRECTIONAL FIBER COMPOSITES AND UNDERSTANDING THEIR EFFECT ON MICRO-SCALE STRESS CONCENTRATIONS

V.ROMANOV (KU LEUVEN), SV.LOMOV, I.VERPOEST, L.GORBATIKH

CNTs have a potential to re-distribute stresses in the composite and to suppress stress concentrations. For this, not only the position and concentration of CNTs are important but also the morphology of the nanostructure - namely CNT orientation and waviness.

26.1.1-R10 ELASTOMERIC NANOCOMPOSITES WITH HIGH DIELECTRIC RESPONSE

J.WANG (NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS), S.LI

High dielectric constant nanocomposite was developed by chemically bonding copper phthalocyanine oligomer to polyurethane. The nanocomposite film has a dielectric constant of 391 (100Hz). And a strain of 17.7% can be achieved under a electric field of 10MV/m.

26.1.1-R11 SELF REINFORCED POLYAMIDE 12/CARBON FIBRE HYBRID COMPOSITES

P.HINE (UNIVERSITY OF LEEDS), M.BONNER, I.WARD, Y.SWOLFS, I.VERPOEST

This paper describes the manufacture and properties of self reinforced polymer hybrid composites based on a combination of carbon fibres and oriented polyamide 12 fibres and tapes. Three different hybridisation techniques (intra-yarn, intra-layer and inter-layer) were investigated.

26.1.1-R12 A COMPARATIVE EVALUATION BETWEEN FLAT AND TRADITIONAL ENERGY DIRECTORS FOR ULTRASONIC WELDING OF THERMOPLASTIC COMPOSITES

I.FERNANDEZ (DELFT UNIVERSITY OF TECHNOLOGY), B.VALLE, H.BERSEE, R.BENEDICTUS

Flat energy directors for ultrasonic welding of thermoplastic composites are compared to triangular energy directors. Main result is that flat energy directors offer simplified welding procedures and excellent weld strength with no significant negative impact on welding time or power.

26.1.1-R13 BASALT FIBER REINFORCED PLASTICS (BFRP) WITH ADVANCED MECHANICAL PROPERTIES

K.KUZMIN (LOMONOSOV MOSCOW STATE UNIVERSITY), S.GUTNIKOV, E.ZHUKOVSKAYA, IA.TIMOSHKIN, B.LAZORYAK

The effect of contents network formers and modifiers oxides on mechanical properties of basalt continuous fibers was investigated. The influence of surface modification basalt fibers on mechanical behavior of a basalt fiber reinforced plastics was explored experimentally.

26.1.1-R14 STRUCTURAL AND MICROMECHANICAL CHARACTERIZATION OF THE INTERPHASE REGION BETWEEN TWO THERMOSET RESINS

YA.JANSSENS (UCL), B.COULON, Q.VOLEPPE, M.SCLAVONS, D.MAGNIN et al.

Local interactions at the interface between two thermoset resins are investigated using microscopic, chemical and micromechanical characterization techniques. The results allow a quantitative analysis of the concentration profile in the interface region.

26.1.2-R8 EFFECT OF SUPERHEATED STEAM TREATMENT ON INTERFACIAL SHEAR STRENGTH OF CARBON FIBER - EPOXY COMPOSITES

M.WADA (JAPAN FINE CERAMICS CENTER), K.KAWAI, T.SUZUKI, H.HIRA, S.KITAOKA

Superheated steam treatment with or without gas addition increased the amount of surface functional groups on carbon fiber and thus it resulted in an improvement of interfacial adhesion between the fiber and epoxy resin.

26.1.2-R9 CAI STRENGTH OF CFRP LAMINATES TOUGHENED WITH MULTI-WALLED CARBON NANOFIBER

M.ARAI (SHINSHU UNIVERSITY), H.ITO, M.NISHIMURA, T.ZAKOJI, M.QUARESIMIN

In the present study, an alternative way to increase residual compression strength after impact of CFRP laminate by means of adding carbon nanofibers in the matrix resin was suggested.

26.1.2-R10 POLYVINYLIDENE FLUORIDE BASED NANOCOMPOSITES WITH HIGH DIELECTRIC CONSTANT

S.LI (NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS), J.WANG, J.XIAO

PVDF based nanocomposites filled by multi-walled carbon nanotubes were prepared by the solution cast method. The nanocomposite films were measured by FTIR, Raman, FESEM separately.The dielectric properties of the samples were analysed discussed.

26.1.2-R11 MECHANICAL BEHAVIOUR OF HYBRID 3D WOVEN COMPOSITES UNDER STATIC AND IMPACT LOADINGS

F.MARTINEZ, R.MUÑOZ, R.SELTZER, C.GONZÁLEZ (UNIVERSIDAD POLITECNICA DE MADRID & IMDEA MATERIALS), J.LLORCA

Experimental characterisation of hybrid 3D composite material subjected to in-plane tensile and low-velocity impact loadings. Specimens were manufactured using hybrid 3D orthogonal preforms made of S2-glass, T700 carbon and UHMWPE Dyneema fibers. Inspection post-mortem specimens conducted by X-ray computer tomography

26.1.2-R12 EXPERIMENTAL INVESTIGATIONS OF THE DISBOND STOPPING CAPABILITY OF A NOVEL EPOXY-THERMOPLASTIC BONDLINE ARCHITECTURE FOR COMPOSITE JOINTS

T.LÖBEL (GERMAN AEROSPACE CENTER), M.KÜHN, D.HOLZHÜTER, C.HÜHNE

A novel bondline architecture for bonded composite joints is presented. By implementing a distinct rather ductile thermoplastic phase, a physical barrier for growing disbonds is obtained and thus a more fail-safe design, respectively.

26.1.2-R13 BASALT FIBRE REINFORCED POLY(LACTIC ACID) BASED COMPOSITES FOR ENGINEERING APPLICATIONS

T.TÁBI (HUNGARIAN ACADEMY OF SCIENCES / BUDAPEST UNIVERSITY OF TECHNOLOGY AND ECONOMICS), NT.KOVÁCS, JG.KOVÁCS

We have investigated the usability of basalt fabrics as novel reinforcement for the renewable resource based and inherently biodegradable polymer Poly(Lactic Acid). The composites were prepared by film-stacking method. The effect of processing parameters were analysed on the mechanical properties.

26.1.2-R14 THE EFFECT OF NANO-REINFORCED FIBER/MATRIX INTERPHASE ON STRESSES IN STEEL FIBER COMPOSITES

B.SABUNCUOGLU (KU LEUVEN), L.GORBATIKH, SV.LOMOV

Two types of nano-modifications are investigated for the reduction of transverse stress concentrations using finite element analysis. Results indicate presence of nano-reinforcements near fiber interface increases radial stress concentration. whereas shear stress concentrations are suppressed in the case of CNTs.

26.1.3-R8 ATMOSPHERIC-PRESSURE PLASMA AND UV-LASER RADIATION – A COMPARISON FOR SURFACE PRE-TREATMENT OF CFRP

F.FISCHER (TU BRAUNSCHWEIG, INSTITUTE OF JOINING AND WELDING), D.BLASS, S.KRELING, K.DILGER

Dr. Fabian Fischer is the head of the Departments Composites and Beam Technologies at the Institute of Joining and Welding at the TU Braunschweig, Germany. He has delved deeply the laser treatment of polymers and joining methods for hybrid materials.

26.1.3-R9 MULTISCALE MODELING ON POLYMER NANOCOMPOSITES CONSIDERING PERCOLATED INTERPHASE

H.SHIN (SEOUL NATIONAL UNIVERSITY), J.CHOI, S.CHANG, M.CHO

A multiscale homogenization modeling of polymer nanocomposites considering percolated interphase is proposed. In view of particle-particle interaction and particle-polymer interaction, the interaction behaviors are investigated. Particle-polymer interaction mechanically dominant force is reflected in effective interphase.

26.1.3-R10 MODELING OF DIELECTRIC PROPERTIES OF POROUS PEROVSKITE CERAMICS

I.RYCHETSKY (INSTITUTE OF PHYSICS, ASCR), A.KLIC

Porous ceramics is modeled as random set of overlapping cubic grains. The effective permittivity is analyzed using the spectral representation formalism and the finite element method. It is shown that the permittivity is well described by the semi-empirical Lichtenecker formula.

26.1.3-R11 HYBRID COMPOSITES WITH ALIGNED DISCONTINUOUS FIBRES

H.YU (UNIVERSITY OF BRISTOL), M.JALALVAND, MR.WISNOM, KD.POTTER

In this paper, hybrid composites consisting of continuous glass laminates and aligned discontinuous carbon preforms developed by the HiPerDiF (High Performance Discontinuous Fibre) method were designed as a layer-by-layer system to achieve pseudo-ductile response and tested in tension.

26.1.3-R12 ADVANCED 3D FINITE ELEMENT SIMULATION OF THERMOPLASTIC CARBON FIBER COMPOSITE INDUCTION WELDING

M.DUHOVIC (INSTITUT FÜR VERBUNDWERKSTOFFE GMBH), P.L’EPLATTENIER, I.CALDICHOURY, P.MITSCHANG, M.MAIER

The joining of fiber reinforced polymer composites via induction welding is a complex multi-physics problem. In the present work, FEA methods have been used to simulate single and double plate static induction heating of carbon fiber based thermoplastic composite laminates.

26.1.3-R13 COMPETITIVE SIOC COMPOSITES WITH INCREASED THERMAL STABILITY FOR APPLICATIONS IN EXHAUST SYSTEMS

R.GADOW, P.WEICHAND (IMTCCC, UNIVERSITY STUTTGART)

Basalt fiber reinforced SiOC composites for intermediate service temperatures have been developed using manufacturing technologies established in the polymer composite manufacturing in combination with metal-organic polymers. After pyrolysis the composites offer superior thermal stability and excellent tribological properties.

26.1.3-R14 INTERFACIAL STRUCTURE ANALYSES OF POLYMER LAMINATES USING SCANNING THERMAL MICROSCOPE, MICRO-BEAM X-RAY DIFFRACTION, AND NANO-RAMAN SPECTROSCOPE

C.HONGO (KOBE UNIVERSITY), M.KOTERA, Y.URUSHIHARA, D.IZUMO, T.NISHINO

The interfaces in poly-α-olefin laminates were analyzed using scanning thermal microscopy, synchrotron micro-beam X-ray diffraction, and nano-Raman spectroscopy. The interfacial thickness with several micrometres changed by annealing, which directly influenced the adhesive strength of the laminates.

26.1.4-R9 THE EFFECT OF DIFFERENT CARBON NANOTUBE CONCENTRATION ON GLASS FIBER REINFORCED PLASTIC COUPONS UNDER PROGRESSIVE DAMAGE ACCUMULATION TESTS

N.ALEXOPOULOS (UNIVERSITY OF THE AEGEAN), I.LAZARIDOU, A.VAIRIS, M.PETOUSIS

GFRP plates were manufactured using VARI were manufactured with either neat epoxy resin or doped with CNTs at various concentrations. Parameters to express the different electrical resistance measurements to gauge length are attempted and discussed in the paper.

26.1.4-R10 TAIAILORING MICROWAVE DIELECTRIC PROPERTIES OF CERAMICS/PTFE COMPOSITE WITH MULTI-LAYERED STRUCTURES

CJ.JEON, ES.KIM (KYONGGI UNIVERSITY)

Effects of connectivity patterns and multi-layered structures on the dielectric properties of polytetrafluoroethylene (PTFE) composites with low-loss ceramics (ZnMoO4, MgMoO4 and MgTa2O6) were investigated at microwave frequencies applicable to high-performance substrate and electronic packages

26.1.4-R11 MODELLING THE TENSILE RESPONSE OF UNIDIRECTIONAL HYBRID COMPOSITES

S.PIMENTA (IMPERIAL COLLEGE LONDON), P.ROBINSON

An analytical model for the tensile response of hybrid fibre composites is proposed. The model predicts full strength-distributions, size-effects, non-linear stress-strain curves, and the accumulation of fibre-breaks. The effect of relative fibre properties, fibre ratio and hybridisation degree is analysed.

26.1.4-R13 MECHANICAL CHARACTERIZATION OF UNIDIRECTIONAL BASALT FIBER EPOXY COMPOSITE

G.MARINUCCI (BRAZILIAN NAVY TECHNOLOGICAL CENTER), MH.LAPENA, O.DE CARVALHO

Determination of mechanical and elastic properties of basalt/epoxy composites following the ASTM standard. Tensile test was carried out at laminated specimens in longitudinal and transversal fiber directions. The panels were manufactured by a filament winding process.

26.1.4-R14 THE INFLUENCE OF COUPLING AGENT, FIBER SIZING AND MATRIX DEGRADATION ON THE INTERFACIAL SHEAR STRENGTH BETWEEN CARBON FIBRE AND POLYPROPYLENE

D.BURN (UNIVERSITY OF NOTTINGHAM), L.HARPER, M.JOHNSON, NA.WARRIOR, L.YANG et al.

The focus of this paper is interfacial interactions between pseudo-recovered carbon fibre and polypropylene. The influence of fibre sizing removal, addition of a maleic anhydride coupling agent and degradation of the polymer matrix during droplet formation are investigated.