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INFLUENCE OF LOAD APPLICATION AND FIXTURE ON CHARACTERISTIC VALUES AT SHORT-TIME-DYNAMIC COMPRESSION TESTING OF CARBON/EPOXY COMPOSITES
Tobias Schmack (Audi AG) Daniel Huelsbusch (Technical University of Dortmund) Riccardo Righi (Audi AG) Julius Rausch (Audi AG) David Roquette (Audi AG) Günter Deinzer (Audi AG) Frank Walther (Technical University of Dortmund)
This study deals with the comparison of two fixtures to obtain strain rate-dependent properties of carbon fiber-reinforced plastics (CFRP) under axial compression.
LOW VELOCITY IMPACT AND COMPRESSION AFTER IMPACT SIMULATION OF THIN PLY LAMINATES
Albert Soto (University of Girona) Emilio González (AMADE, Universidad de Girona) Pere Maimí (AMADE, Universidad de Girona) Jose Ramon Sainz de Aja (Aernnova Engineering Solutions Ibérica S.A.) Federico Martin De La Escalera (Aernnova Engineering Solutions Ibérica S.A.)
The paper deals with low velocity impact and compression after impact simulations of thin ply laminates (fabric plain weave). It studies the effect of the constitutive law and the number of interfaces for delamination on the CAI strength prediction.
MEASUREMENT OF FRACTURE TOUGHNESS FOR FIBER COMPRESSIVE FAILURE MODE OF UD COMPOSITES UNDER HIGH RATE LOADING
Peter Kuhn (Technical University of Munich / Institute for Carbon Composites) Giuseppe Catalanotti (INEGI) José Xavier (Universidade de Trás-os-Montes e Alto Douro) Rafael Cidade (Universidade Federal do Rio de Janeiro) Hannes Koerber (Technical University of Munich / Institute for Carbon Composites) Pedro Camanho (University of Porto)
Experimental study of the compressive R-curve of an UD composite when submitted to dynamic loading. The data reduction couples the concepts of energy release rate, size effect law and R-curve.
MODELLING OF LOW VELOCITY IMPACTS ON UNIDIRECTIONAL COMPOSITE LAMINATES USING A SEMI-CONTINUOUS STRATEGY
Bassam Mahmoud (Mechanical Engineering) Marcos Colungo Torrecilla (Universite Federale Toulouse Midi-Pyrenees) Pablo Navarro (Institut Clément Ader) Steven Marguet (Institut Clément Ader) Issam Tawk (University of Balamand) Jean-François Ferrero (Institut Clément Ader)
This paper deals about the modeling of unidirectional composite laminates under low velocity impacts. A semi-continuous FEM strategy is presented. Drop tower tests are perdormed to compare with numerical results. A good correlation is found.
NUMERICAL ANALYSIS OF LOW VELOCITY IMPACTS ON 5HS WOVEN COMPOSITE LAMINATES
P. G. Rodríguez-Luján (Universidad Carlos III de Madrid) Jose Alfonso Artero-Guerrero (Universidad Carlos III de Madrid) Jesus Pernas-Sanchez (Universidad Carlos III de Madrid) D. Varas (Universidad Carlos III de Madrid) Jorge López-Puente (Universidad Carlos III de Madrid)
This work proposes a numerical methodology to model the response of woven laminates under low velocity impacts. The model is validated thorough experimental tests in which it is studied the influence of thickness, ply sequence and ply clustering.
OPTIMAL DESIGN OF CERAMIC/SANDWICH COMPOSITE STRUCTURES TO BETTER RESIST FOR AP PROJECTILE IMPACT
Sergei Sapozhnikov (South Ural State University) Galina A. Forental (South Ural State University)
The typical ceramic/composite personal protective structures now are monolithic. Splitting composite part into two different thickness plates we have designed optimal sandwich structure which has 20% less weight with the same AP resistance.
OUT OF PLANE IMPACT ON WOVEN COMPOSITES PLATES: EFFECTS OF THICKNESS, PLY SEQUENCE AND PLY CLUSTERING.
P. G. Rodríguez-Luján (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 proposes an experimental methodology to study the response of woven laminates under low velocity impacts. The test are designed in order to study the influence of thickness, ply sequence and ply clustering.
PREDICTION OF THE ENERGY ABSORPTION BEHAVIOUR OF LARGE COMPOSITE COMPONENTS SUBJECTED TO IMPACT LOADS – ASSESSMENT OF INDIVIDUAL MECHANISMS AT PLY SCALE
Martin Schwab (Vienna University of Technology) Heinz E. Pettermann (Vienna University of Technology)
An efficient modelling strategy for simulating impact on structural composite components is presented. Thereby, an embedding approach combined with shell element based discretisation allows to keep the computational effort within reasonable bounds.
STRUCTURAL OPTIMISATION OF A COMPOSITE AIRCRAFT FRAME FOR A CHARACTERISTIC RESPONSE CURVE
Lennart Weiß (German Aerospace Center) Hardy Köke (German Aerospace Center) Martin Schlueter (Hokkaido University) Christian Hühne (German Aerospace Center)
An heuristic optimisation technique for a desired dynamic response curve of CFRP z-frames used in aerospace applications is investigated. A mixed-integer distributed ant colony (MIDACO) algorithm was applied to identify dimensions and laminates.
TESTING OF CFRP AT HIGH STRAIN RATES WITH THE SPLIT HOPKINSON TENSION BAR - EVALUATION OF TESTING QUALITY
Hanna Paul (Fraunhofer EMI) Noah Ledford (Fraunhofer EMI) Richard Mohrmann (Fraunhofer EMI) Michael May (Fraunhofer EMI)
Split Hopkinson Tension Bars are used to test materials at high strain rates under tensile loading. An alternative mounting concept is presented. The quality of the test results is evaluated using FEM Simulations and comparing real test results.
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