25.3.1-R8 A NEW CURVATURE MORPHING SKIN: MANUFACTURING, EXPERIMENTAL AND NUMERICAL INVESTIGATIONS

A.SCHMITZ (TU BRAUNSCHWEIG), P.HORST

A new curvature morphing skin featuring a large curvature at rupture with a high perpendicular stiffness is presented. After introducing the structural concept and manufacturing processes, large bending experiments are conducted. Numerical insights are given by a finite element unit-cell.

25.3.1-R9 FLEXURAL PERFORMANCE OF HYBRID MULTI-GIRDER BRIDGE DECK WITH ALL-GFRP TRANSVERSE COMPOSITE ACTION SYSTEM

D.CHEN, R.EL-HACHA (UNIVERSITY OF CALGARY)

Hybrid bridge deck system built-up using FRPs and UHPC, with a transverse composite action system composed of horizontal and diagonal GFRP rods, tested under concentric and eccentric four-wheel loading configurations demonstrated good overall performance at service and ultimate loading conditions.

25.3.1-R10 SIMULATION AND TESTING OF STRUCTURAL COMPOSITE MATERIALS EXPOSED TO FIRE DEGRADATION

A.LOZANO (UNIVERSIDAD POLITECNICA DE MADRID), A.FERNÁNDEZ-LÓPEZ, A.GÜEMES

A sort of flat laminates were experimentally tested under fire condition. FBG sensors were embedded at four different depths in order to monitor the structure, and results were compared to a FEM model to validate all the physical phenomena involved.

25.3.1-R11 FAST PREDICTION OF THE FATIGUE BEHAVIOR FROM HEAT BUILD-UP MEASUREMENTS: APPLICATION TO SHORT FIBER REINFORCED THERMOPLASTICS UNDER VARIOUS LOADING CONDITIONS

L.ABELLO (LBMS ENSTA BRETAGNE), Y.MARCO, V.LE SAUX, G.ROBERT, P.CHARRIER

In this study, a simple way to get the cyclic dissipated energy from thermal measurements is suggested, usable for homogeneous and heterogeneous dissipation fields.

25.3.1-R12 SIMULATION OF LAMINATED STRUCTURES USING THE PROPER GENERALIZED DECOMPOSITION

S.METOUI (ENSAM), E.PRULIERE, A.AMMAR, F.DAU, I.IORDANOFF

A new numerical strategy is proposed to treat delamination in composites. The idea is to solve the full 3D solid problem with cohesive zones separating the in-plane and the out-of-plane spaces in the context of the Proper Generalized Decomposition.

25.3.1-R13 MECHANICAL PROPERTIES OF RECYCLED CARBON FIBER REINFORCED THERMOPLASTICS MADE BY CARBON FIBER PAPER

H.WEI (THE UNIVERSITY OF TOKYO), T.AKIYAMA, H.LEE, I.OHSAWA, J.TAKAHASHI

In this experiment, we used paper making process to prepare recycled carbon fiber reinforced thermoplastics. To improve the application of the recycled carbon fibers (RCF), we mixed different kinds of RCF by specific ratio. The mechanical properties were investigated.

25.3.1-R14 CHARACTERIZATION AND MODELING OF THE TIME-DEPENDENT BEHAVIOR OF THE RTM6 STRUCTURAL EPOXY INVOLVING RECOVERY, CREEP AND BACK STRESS

X.MORELLE (UCL), A.BAHRAMI, F.LANI, M.MELCHIOR, B.NYSTEN et al.

Time-dependent behavior of RTM6 is addressed with an emphasis on backstress upon unloading and on strain-recovery observed at zero-stress after deformation. Intermediate unloading creep tests have shown a complex rate-reversal phenomenon. Tentative is made to correlate this behavior with local-stress-heterogeneity.

25.3.2-R8 NUMERICAL ANALYSIS OF IMPACT AND POST-IMPACT BEHAVIOR OF TITANIUM MATRIX COMPOSITES FOR LANDING GEAR APPLICATION

T.YOKOZEKI (THE UNIVERSITY OF TOKYO), N.KOTSUKA, K.FUJIWARA, T.SATO

Application of titanium matrix composites is considered as a candidate material for light-weight and compact landing gear structures. The present paper presents experimental and numerical programs of SiC/Ti composites taking the impact and post-impact damage and mechanical behavior into account.

25.3.2-R9 NUMERICAL AND EXPERIMENTAL EVALUATION OF FRP REINFORCEMENT ON THE MECHANICAL BEHAVIOR OF TIMBER BEAMS

D.BRU ORTS (UNIVERSIDAD DE ALICANTE), FJ.BAEZA, S.IVORRA, FB.VARONA

Static and dynamic properties of timber beams were reported. The main objective is to determine the best FRP reinforcement configuration. Experimental optimization of the laminates was made(glass/carbon fibers, fiber/resin dosage). Orthotropic mechanical properties were studied. Differents FE model were implemented.

25.3.2-R10 MONTMORILLONITE-DOPED COMMINGLED COMPOSITES FOR IMPROVED FIRE PERFORMANCE

M.MONTI (PROPLAST CONSORTIUM), S.TSAMPAS, P.FENBERG, P.BLOMQVIST, G.CAMINO

In this study, a nanoclay-doped PA6 was used to produce a glass fiber composite, through the commingling technique. As a result, a fiber reinforced composite with an effective nanoparticle dispersion was obtained and its combustion behavior was studied.

25.3.2-R11 DAMAGE EVOLUTION IN SHORT FIBRE REINFORCED POLYAMIDE CAUSED BY BIAXIAL LOADING

K.METZKES (BAM FEDERAL INSTITUTE FOR MATERIALS RESEARCH AND TESTING), V.TRAPPE

A short fibre reinforced polyamide 6 is analysed regarding its uniaxial and biaxial fatigue behaviour and its damage evolution caused by fatigue loading.

25.3.2-R12 COMPUTATIONAL VADEMECUMS FOR A FAST AND RELIABLE SIMULATION OF RTM PROCESSES

E.CUETO (UNIVERSIDAD DE ZARAGOZA), E.ABISSET-CHAVANNE, A.HUERTA, F.CHINESTA

This work proposes to use PGD to optimize the main process parameters, injection flow rate and injection temperature, in order to ensure reasonable fabrication and costs. A computational vademecum is built, having the two parameters of interest as variables.

25.3.2-R13 SPINCOM YARNS - FROM REINFORCEMENT TO FUNCTIONAL FIBRES

N.WIEGAND (LEIBNIZ INSTITUT FÜR POLYMERFORSCHUNG), E.MÄDER

SpinCOM yarns were spun with three polymeric matrices. Tailored sizings were applied and the resulting mechanical performance was evaluated. The consolidation behavior during isothermal moulding was investigated. Different fibre volume contents could be realized and resulting mechanical properties were tested.

25.3.2-R14 COMPARISON OF PREDICTED ONSET OF FAILURE MECHANISMS BY NONLINEAR FAILURE THEORY AND BY ACOUSTIC EMISSION MEASUREMENTS

M.SAUSE (UNIVERSITY OF AUGSBURG), A.MONDEN

Tensile testing of CFRP specimens with cross-ply stacking was performed including acoustic emission monitoring. The signals were analyzed by pattern recognition to distinguish between the occurrences of different failure mechanisms. Their onset was compared to nonlinear laminate failure prediction.

25.3.3-R8 A NEW LIGHTWEIGHT STRUCTURE SYSTEM FOR A NANO DEEP SPACE PROBE

H.FUJII (KYUSHU INSTITUTE OF TECHNOLOGY), Y.MASHIMA, S.HIBINO, I.INOUE, KI.OKUYAMA

Using Carbon Fiber Reinforced Thermo Plastics, it is possible to construct the material of the probe. This paper shows a new structure that can be created to decrease the number of metal fittings and the total mass by CFRTP use.

25.3.3-R9 DEVELOPMENT OF NOVEL AUXETIC STRUCTURES FROM BRAIDED COMPOSITE RODS FOR STRUCTURAL APPLICATIONS

P.SUBRAMANI (UNIVERSITY OF MINHO), S.RANA, D.OLIVEIRA, R.FANGUEIRO

25.3.3-R10 CFD-FEA SIMULATION FRAMEWORK FOR COMPOSITE STRUCTURES IN FIRE

A.PAAJANEN (VTT TECHNICAL RESEARCH CENTRE OF FINLAND), S.HOSTIKKA, A.MATALA, R.GUTKIN

We present a simulation framework for the fire-response of polymer matrix composites, which is based on sequential coupling of existing software. Fire Dynamics Simulator is used to model the fire environment, and either ABAQUS or ANSYS for a thermal-mechanical analysis.

25.3.3-R11 PREDICTION OF FIBER ORIENTATION IN SHORT GLASS FIBER POLYPROPYLENE COMPOSITES AND THE CONSEQUENCES FOR MICROMECHANICAL SIMULATIONS

M.JERABEK (BOREALIS POLYOLEFINE GMBH), S.GASTL, G.GSELLMANN, M.REITER, A.HARTL et al.

Fiber orientation predictions for different part geometries are compared to experimental data. These results are then included in a micromechanical model to compute the mechanical behavior of specimens and again compared to experimental measurements.

25.3.3-R12 A FAST AND EFFICIENT GEOMETRICAL METHOD TO OPTIMIZE LRI PROCESSES

N.MONTES, F.SANCHEZ (UNIVERSIDAD CEU CARDENAL HERRERA), A.FALCÓ, F.CHINESTA, E.CUETO et al.

This paper presents a fast and efficient geometrical method to optimize LRI processes based on Level set methods. It allows us to obtain the same results than previous works but without the limitations of FPCS+Delaunay

25.3.3-R13 ACTIVITIES ON IN-SITU CONSOLIDATION BY AUTOMATED PLACEMENT TECHNOLOGIES

F.RODRIGUEZ-LENCE, M.ZUAZO (FIDAMC), S.CALVO, E.LORENZO

25.3.3-R14 SIMULATION OF CUSP FORMATION IN MODE II DELAMINATION

F.VAN DER MEER (TU DELFT), LJ.SLUYS

A numerical study into the micromechanics of delamination is presented. The complexity of cusp formation in mode II delamination makes this a challenging task. Simulations have been performed with the cohesive zone method and with the thick level set method.

25.3.4-R8 WEIGHT OPTIMISATION OF AN ELLIPTICAL CROSS-SECTION OF A SANDWICH FUSELAGE

A.BOULLE, F.GOSSELIN (ECOLE POLYTECHNIQUE DE MONTREAL), M.DUBÉ

We consider an elliptical fuselage cross-section and develop a theoretical analysis to optimise its skin thickness in function of the pressure loading and eccentricity. A comparison of the elliptical fuselage with a circular one for different scenarios is developed.

25.3.4-R9 ANALYSIS OF THE TECHNICAL VIABILITY OF GFRP REINFORCED PRECAST CONCRETE PILES

JD.JIMÉNEZ, D.FERNÁNDEZ, E.MANZANO, C.PAULOTTO (ACCIONA INFRAESTRUCTURAS S.A.)

Precast concrete piles reinforced with GFRP bars are designed to have the same load capacity of standard steel reinforced piles. High-strain dynamic tests are performed on full-scale prototypes of driven piles to assess the technical viability of this technology.

25.3.4-R10 GRAPHENE-BASED DISPERSION AS FLAME RETARDANT COATING FOR POLYMERIC MATRICES

LG.RIZZI (DIRECTA PLUS), G.CESAREO, A.FRACHE, G.CAMINO

Directa Plus is a company devoted to the large-scale production of graphene-based materials. These products have been employed as FR-additives on a variety of polymeric matrices and their behavior sustains the definition of a new class of non-toxic highly-efficient additives.

25.3.4-R12 DIRECT SIMULATION OF THE KINEMATIC EVOLUTION OF A POPULATION OF RIGID FIBERS

M.RABIH (ECOLE CENTRALE DE NANTES), E.ABISSET-CHAVANNE, J.FÉREC, G.AUSIAS, F.CHINESTA

A direct numerical simulation of concentrated rigid fiber suspensions is presented.The kinematic of a population of fibers is calculated.This simulation is necessary since the final orientation of the fibers is induced by the flow during the processing of the composites.

25.3.4-R13 THE INFLUENCE OF MOISTURE CONTENT ON THE HEAT AFFECTED ZONE AND THE RESULTING IN-PLANE SHEAR STRENGTH OF LASER CUT THERMOPLASTIC CFRP

R.STAEHR (LASER ZENTRUM HANNOVER E.V.), S.BLUEMEL, P.HANSEN, P.JAESCHKE, OR.SUTTMANN et al.

In this work investigations on the effect of the moisture content of carbon fiber reinforced polyetherimide and polyphenylene sulphide sheets on the heat affected zone and the resulting in-plane shear properties of laser machined specimens are presented.

25.3.4-R14 PREDICTION OF OPEN HOLE COMPRESSIVE FAILURE FOR QUASI-ISOTROPIC CFRP LAMINATES

Y.MIYANO (KANAZAWA INSTITUTE OF TECHNOLOGY), T.HIOKI, M.NAKADA

The procedure of MMF/ATM method proposed for the fatigue life prediction of the structures made of CFRP laminates. The validity of method is confirmed through evaluating the open hole compression fatigue strengths of quasi-isotropic CFRP laminates.