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ON THE EFFECT OF FIBRE SHAPE IN FIBRE REINFORCED POLYMERS: STRENGTH AND TOUGHNESS
Miguel Herraez (IMDEA Materials) Carlos González (Polytechnic University of Madrid & IMDEA Materials Institute) Claudio Lopes (IMDEA Materials Institute) Roberto Guzman de Villoria (IMDEA Materials Institute) Javier Llorca (Polytechnic University of Madrid & IMDEA Materials Institute) T. Varela (Airbus Operations) J. Sánchez (Airbus Operations)
Computational micromechanics applied to evaluate the effect of fibre shape on the transverse tension and compression properties of unidirectional composites.
DESIGNING TOUGHER MICROSTRUCTURES BY 3D PRINTING OF CONTINUOUS FIBRE-REINFORCED COMPOSITES
Yentl Swolfs (KU Leuven) Silvestre Pinho (Imperial College London)
A finite element model for maximising the translaminar fracture toughness of fibre-reinforced composites was developed. The optimised microstructures were then 3D printed with continuous fibres and tested experimentally.
HIGH-TOUGHNESS CFRP LAMINATES WITH ENGINEERED FRACTURE SURFACES: A SHARK-TEETH DESIGN
Silvestre Pinho (Imperial College London) Gianmaria Bullegas (Imperial College London) Soraia Pimenta (Imperial College London)
Carefully placed patterns of micro-cuts have been designed and then used to increase the translaminar work of fracture in thin-ply composite laminates. These led to a 68% increase in notched strength and 460% increase in work of fracture.
THE ROLE OF POLYMER PHASE ON THE DEFORMATION OF HIGHLY FILLED PARTICULATE POLYMER COMPOSITES
Sambit Bapari (Indian Institute of Science) Atul Chokshi (Indian Institute of Science)
We have studied difference in compressive strengths of highly filled polymer composites at different temperatures. It is evident that the polymer phase is playing a critical role even at volume fraction close to random close packing.
ANALYSIS OF OMEGA STIFFENER UNDER BENDING AFTER IMPACT TESTS
Muhammad Ridha (National University of Singapore) Tong-Earn Tay (National University of Singapore) Sven Werner (Airbus Operations) Paul Joern (Airbus Operations) Vincent B.C. Tan (National University of Singapore)
The combined experimental and simulation studies shows that a proper progressive damage tools can give a better understanding of the failure mechanisms during impact and subsequent bending test. This can then be used to find better design solutions.
FATIGUE LIFE OF POSTBUCKLED STRUCTURES WITH INDENTATION DAMAGE
Carlos Davila (NASA) Chiara Bisagni (Delft University of Technology)
The fatigue life of composite stiffened panels with indentation damage was investigated experimentally using single stringer compression specimens.
DESIGN PARAMETER STUDY OF A CFRP T-JOINT UNDER OVERPRESSURE CONDITIONS DUE TO BALLISTIC IMPACT
José Luis Sandoval Murillo (Fraunhofer EMI) Georg Ganzenmüller (Fraunhofer EMI) Sebastian Heimbs (Airbus Group Innovations) Michael May (Fraunhofer EMI)
In this article a numerical parameter study on the mechanical response of composite T-joints is performed. The influence of different design parameters on the strength of the joint is quantified. Optimal values for these parameters are suggested.
MECHANICAL PROPERTIES OF GFR-POLYURETHANE AND -EPOXY FOR IMPACT RESISTANT APPLICATIONS UNDER SERVICE-RELEVANT TEMPERATURES
Daniel Huelsbusch (Technical University of Dortmund) Yves Mueller (HSR Hochschule für Technik Rapperswil) Gion Andrea Barandun (HSR Hochschule für Technik Rapperswil) Michael Niedermeier (HRW Hochschule Ravensburg-Weingarten) Frank Walther (Technical University of Dortmund)
New developed GFR-Polyurethane was characterized in terms of ILSS, CAI, tensile and fatigue tests and compared to GFR-Epoxy used in the aerospace industry. Furthermore, the influence of tempering on the mechanical properties was investigated.
NUMERICAL APPROACH TO DESIGN AERONAUTICAL COMPOSITE LAMINATE BASED ON IMPACT DAMAGE TOLERANCE PHILOSOPHY
Nicolas Dubary (Institut Clément Ader) Christophe Bouvet (Institut Clément Ader) Samuel Rivallant (Institut Clément Ader) Léon Ratsifandrihana (Segula Technologies)
Investigating laminate's residual properties in function of damage detection is the main purpose of design by impact damage tolerance. The first step of numerical design approach is proposed with the Discrete Ply Model on several stacking sequences.
NUMERICAL STOCHASTIC STUDY OF DEFECTS IN COMPOSITE MATERIALS: INFLUENCE OF POROSITY AND WRINKLES ON THE MECHANICAL BEHAVIOR.
Hassoun Ishak (Institut de Recherche Technologique (IRT) Jules Verne) Alexandre Clement (Institut de Recherche Technologique (IRT) Jules Verne) Frédéric Jacquemin (Institut de Recherche en Génie Civil et Mécanique)
In this paper we will study the influence of porosity and wrinkles defect on the mechanical behavior of a composite materials.
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