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SUITABILITY OF STIFFNESS AND STRENGTH BASED CONCEPTS FOR THE FATIGUE-LIFE PREDICTION OF COMPOSITES

Gerald Pinter (Montanuniversitaet Leoben) Julia Maier (Montanuniversitaet Leoben) Markus Wolfahrt (Polymer Competence Center Leoben GmbH) Clara Schuecker (Montanuniversitaet Leoben)

 

A critical review on the applicability of fatigue-life prediction tools available at the moment in the scientific and industrial community is given. Potentials and weaknesses of the different theories are discussed.

 

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A COMPARATIVE STUDY OF THE STATIC AND CYCLIC ACOUSTIC EMISSION BEHAVIOR OF FIBER REINFORCED THERMOPLASTICS

Constantin Bauer (Institute for Composite Materials) Thomas Rief (Institute for Composite Materials) Joachim Hausmann (Institute for Composite Materials) Thomas Schalk (ZF Friedrichshafen AG)

 

The present work deals with the acoustic emission behavior of short fiber-reinforced thermoplastics. The aim of this work is to transfer the information acquired with acoustic emission in static tensile tests to the fatigue behavior of the material.

 

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CREEP-FATIGUE INTERACTION IN COMPOSITE MATERIALS

Abdolvahid Movahedi-Rad (Ecole Polytechnique Fédérale de Lausanne) Thomas Keller (Ecole Polytechnique Fédérale de Lausanne) Anastasios Vassilopoulos (EPFL)

 

A novel phenomenological model taking into account the creep-fatigue interaction in composite materials’ fatigue performance is introduced in this paper.

 

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CHANGE OF GLASS FIBER COMPOSITE CHARACTERISTIC DYNAMIC FATIGUE CURVE DUE TO ACCUMULATED STATIC FATIGUE DAMAGE.

Reidar Anderssen (University of Agder) Ketil Bingslien (University of Agder)

 

The DNV–OS-C501material model does not address that the fatigue curve may change due to accumulated static fatigue damage. A model for the characteristic fatigue curve as a function of the time dependent stress rupture damage is proposed.

 

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DAMAGE EVOLUTION IN GLASS FIBRE REINFORCED COMPOSITES

Steffen Stelzer (Montanuniversitaet Leoben) René Rieser (Montanuniversitaet Leoben) Gerald Pinter (Montanuniversitaet Leoben)

 

Glass fibre reinforced epoxy composites with various stacking sequences are subjected to fatigue loading. The stiffness degradation of the samples is recorded via cyclic tensile tests and correlated to damage initiation and propagation.

 

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EFFICIENT MICRO-MECHANICAL MULTIAXIAL FATIGUE TESTING AND MODELLING FOR GFRP LAMINATES

Jens Ammitzbøll Glud (Aalborg University) Janice Dulieu-Barton (University of Southampton) Ole Thybo Thomsen (University of Southampton) Lars Christian Terndrup Overgaard (Aalborg University)

 

A micro-mechanical multiaxial fatigue model for predicting the layerwise crack density evolution in laminated composites.

 

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DAMAGE INITIATION CRITERION OF CFRP UNDER VIBRATION FATIGUE TESTING: EXPERIMENTS AND MODEL VALIDATION

Fabrizio Magi (University of Bristol) Dario Di Maio (University of Bristol) Ibrahim Sever (Rolls-Royce Plc)

 

This manuscript shows the evidence of a clean critical event in the fatigue life of a composite laminate, suggesting a novel failure criterion to be used for vibration fatigue testing. Experimental results are reported as well as FE simulations.

 

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ENVIRONMENTAL EFFECTS ON THE BENDING FATIGUE OF LAMINATED COMPOSITES: EXPERIMENTAL AND MODELLING APPROACHES

Maozhou Meng (Plymouth University) Huirong Le (University of Derby) Stephen Grove (University of Derby) MD Jahir Rizvi (Plymouth University)

 

This paper investigates the effects of sea water immersion on the fatigue failure of CFRP composites. Dry and wet specimens were tested in a variety of bending conditions following the ISO standard. A FEA model was developed to simulate the problem.

 

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FATIGUE STRENGTH OF A MULTIAXIAL LOADED SHORT GLASS FIBRE REINFORCED POLYAMIDE

Andreas Primetzhofer (Montanuniversitaet Leoben) Andreas Mösenbacher (Montanuniversitaet Leoben) Gerald Pinter (Montanuniversitaet Leoben)

 

The applicability of the multiaxial Gough and Pollard fatigue criteria was examined for short fibre reinforced plastic. Although basically applicable, a distinctive manufacturing influence was determined.

 

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FATIGUE TESTING OF QUASI-UD AND CROSS-PLY REINFORCED COMPOSITES: THE RECENT ACHIEVEMENTS OF TEST SPECIMEN GENERATION

Samuli Korkiakoski (Aalto University) Mikko Kanerva (Aalto University) Olli Saarela (Aalto University)

 

Tension–tension fatigue testing results, damage development and final failure mode were studied using advanced dog-bone specimens for a quasi-UD GFRP laminate reinforced with NCFs and an aramid-fibre reinforced cross-ply laminate.

 

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