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CHARACTERISATION OF HIGH STRAIN RATE DEPENDENCY OF 3D WOVEN CFRP MATERIALS

Nicolas Tran (Snecma) Julien Berthe (ONERA-The French aerospace Lab) Mathias Brieu (Ecole Centrale de Lille) Gérald Portemont (ONERA-The French aerospace Lab) Eric Deletombe (ONERA-The French aerospace Lab) Julien Schneider (Snecma)

 

This paper focuses on the characterisation of high strain rate dependency of a 3D woven CFRP materials. Thereby, an experimental protocol was developed, validated and applied in order to characterize the strain rate sensibility.

 

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DEVELOPMENT AND VALIDATION OF A STRAIN-RATE AND TEMPERATURE DEPENDENT CRUSHING MODEL FOR EXPANDED POLYSTYRENE FOAM APPLIED IN BICYCLE HELMETS

Anastasiia Krundaeva (Ghent University) Guido De Bruyne (University of Antwerp) Wim Van Paepegem (Ghent University)

 

This research is aimed at developing a strain-rate and temperature dependent crushing model for expanded polystyrene foam. This work is also aimed to establish a comparison of the FE analysis in LS-DYNA with the dynamic compression test result.

 

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ELASTIC STRESS OR STRAIN THRESHOLD FOR CARBON/EPOXY MATERIALS BEHAVIOR

Magali Castres (ONERA-The French aerospace Lab) Julien Berthe (ONERA-The French aerospace Lab) Mathias Brieu (Ecole Centrale de Lille) Eric Deletombe (ONERA-The French aerospace Lab)

 

Composite materials are widely used in the aeronautical industry. The behaviour of such materials can be splitted into two domains a first linear and a second non linear. In this work the transition between the linear and non linear part is studied.

 

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AN EXPERIMENTAL STUDY OF THE MODE I INTERLAMINAR FRACTURE TOUGHNESS OF VECTRAN/EPOXY COMPOSITES

Syed Idros Syed Abdullah (Imperial College London) Lorenzo Iannucci (Imperial College London) Emile Greenhalgh (Imperial College London)

 

Mode I interlaminar fracture toughness of Vectran/Epoxy is investigated and compared with UD CF/Epoxy. The interlaminar fracture toughness of Vectran/Epoxy was found to be significantly higher than CF/Epoxy, thus providing better impact protection.

 

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EXPERIMENTAL CHARACTERIZATION OF THE OUT-OF-PLANE SHEAR STRENGTH OF ULTRA-HIGH-MOLECULAR WEIGHT POLYETHYLENE COMPOSITE BY USING THE SPLIT-HOPKINSON BAR DEVICE

Maria Luisa Ruiz Ripoll (Fraunhofer EMI) Oliver Millon (Fraunhofer EMI) Torsten Lässig (Fraunhofer EMI) Werner Riedel (Fraunhofer EMI)

 

The quasi-static and dynamic out-of-plane shear behavior of UHMW-PE composite is experimentally characterized. A new testing method for the measurement of out-of-plane strength and stiffness using Split Hopkinson Bar is presented.

 

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HIGH TEMPERATURE STATIC AND LOW VELOCITY IMPACT BEHAVIOURS OF THERMOPLASTIC COMPOSITES BASED ON PEN AND WOVEN FABRICS

Luigi Sorrentino (National Research Council of Italy) Davi S. de Vasconcellos (National Research Council of Italy) Marco D'Auria ( National Research Council of Italy)

 

Thermoplastic composites based on PEN and four different woven fabrics (carbon, aramid, Vectran and basalt) were tested up to 100 °C by means of static flexural tests, low velocity impacts and dynamic mechanical scans (up to 220 °C).

 

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HIGH VELOCITY IMPACTS OF COMPOSITE FRAGMENTS

Alberto Mata (Universidad Carlos III de Madrid) Jesus Pernas-Sanchez (Universidad Carlos III de Madrid) Jose Alfonso Artero-Guerrero (Universidad Carlos III de Madrid) D. Varas (Universidad Carlos III de Madrid) Jorge López-Puente (Universidad Carlos III de Madrid)

 

This work studies the behaviour of composite fragments when impacting against a rigid from both experimental and numerical approaches. The numerical methodology proposed predicts faithfully the physics of the impact phenomenon.

 

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HIGH-FIDELITY PROGRESSIVE FAILURE ANALYSES OF COMPOSITE LAMINATES UNDER IMPACT LOADING

Zhoucheng Su (Institue of High Performance Computing) Dinh-Chi Pham (Department of Engineering Mechanics, Institute of High Performance Computing, A*STAR) Sridhar Narayanaswamy (Department of Engineering Mechanics, Institute of High Performance Computing, A*STAR)

 

This paper presents an effective approach for high-fidelity progressive failure analyses of composite plates under impact loading. The dynamic response and damage patterns predicted agree well with those obtained from experiments in the literature.

 

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IMPACT DAMAGE IN WOVEN CARBON FIBRE/EPOXY LAMINATES: EFFECT OF STEEL AND ICE PROJECTILES

Laurence Coles (Loughborough University) Anish Roy (Loughborough University) Leonid Voronov (Perm National Research Polytechnic University) Boris Bolotov (Perm National Research Polytechnic University) Mikhail Nikhamkin (Perm National Research Polytechnic University) Vadim Silberschmidt (Loughborough University)

 

Study of the dynamic ballistic response and resulting damage of carbon fibre/epoxy composite specimens subjected to solid (steel) and fragmenting (ice) projectile impacts, using digital image correlation and 3D X-ray computer tomography.

 

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IMPROVEMENT OF THE IN-PLANE CRUSHING RESPONSE OF CFRP SANDWICH PANELS BY THROUGH-THICKNESS REINFORCEMENTS

Lourens Blok (University of Bristol) James Kratz (University of Bristol) Dirk Lukaszewicz (BMW Group) Simon Hesse (BMW Group) Christos Kassapoglou (Delft University of Technology) Carwyn Ward (University of Bristol)

 

The in-plane crushing response of tufted and non-tufted sandwich structures was recorded using a drop-tower test rig, and high-speed camera footage was used to analyse the crushing morphology.

 

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