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EXAMINATION OF DELAMINATION MIGRATION THROUGH MICRO-SCALE SIMULATION

David Mollenhauer (Air Force Research Laboratory) Eric Zhou (University of Dayton) Endel Iarve (University of Texas Arlington) Michael Braginsky (University of Texas Arlington) Kevin Hoos (University of Dayton) Timothy Breitzman (U.S. Air Force Research Laboratory) Dan Rapking (Wright State University)

 

Delamination migration is examined through a multi-scale, global-local modeling approach that incorporates Regularized eXtended Finite Element representations of matrix cracking at a homogenized ply-level to a micro-scale level.

 

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EXPERIMENTAL INVESTIGATION OF DAMAGE TRANSITION IN THERMOPLASTIC COMPOSITES AT THE MICROSCALE

Arief Yudhanto (King Abdullah University of Science and Technology (KAUST)) Husam Wafei (King Abdullah University of Science and Technology (KAUST)) Gilles Lubineau (King Abdullah University of Science and Technology (KAUST)) Nikhil Verghese (SABIC T&I Corporate Research & Development, Composites) Recep Yaldiz (SABIC T&I Corporate Research & Development, Composites)

 

Transition from transverse crack into delamination in thermoplastic composites is investigated microscopically by micro-scale 3-point bending test. Crack speed and influence of fibrillation in the wake of crack are discussed.

 

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FINITE ELEMENT SIMULATION OF NANO-FILAMENTS PULL-OUT FROM CEMENTITIOUS NANOCOMPOSITE MATERIALS USING AN ELASTIC-PLASTIC-DAMAGE AND COHESIVE SURFACE MODELS

Rashid Abu Al Rub (Masdar Institute of Science and Technology)

 

The main focus of this work is on investigating computationally the pull-out behavior of nano-filaments from the cement matrix.

 

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IN SITU FIBRE FAILURE MAPPING ON CFRP BY ULTRAFAST X-RAY COMPUTED TOMOGRAPHY

Serafina Consuelo Garcea (University of Manchester) Philip J. Withers (University of Manchester)

 

Ultrafast in situ synchrotron X-ray computed tomography is used in this work to monitor real time (4D) accumulation of fibre breaks under quasi-static load till one second before the final failure of the coupon.

 

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INTRALAMINAR FRACTURE TOUGHNESS CHARACTERIZATION: A COMPUTATIONAL MICROMECHANICS PERSPECTIVE

Miguel Herraez (IMDEA Materials) Carlos González (Polytechnic University of Madrid & IMDEA Materials Institute) Claudio Lopes (IMDEA Materials Institute)

 

A computational micromechanics model to capture the R-curve corresponding to the intralaminar cracking process through a fibre reinforced polymer has been developed. The model combines an embedded cell approach with the LEFM displacement field.

 

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INFLUENCE OF GRAPHENE NANOPARTICLES ON THE SIZE EFFECT OF EPOXY MATRIX

Christian Leopold (Technische Universität Hamburg-Harburg) Wilfried Liebig (Technische Universität Hamburg-Harburg) Hans Wittich (Technische Universität Hamburg-Harburg) Hans Wittich (Technische Universität Hamburg-Harburg) Bodo Fiedler (Technische Universität Hamburg-Harburg)

 

The size effect of neat and graphene nanoparticle modified epoxy matrix is investigated. A significant size effect is identified for the neat matrix. For graphene modified matrix, failure initiates at the nanoparticles, counteracting any size effect.

 

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LEBIM PREDICTIONS FOR FIBRE-MATRIX DEBONDS IN UNIDIRECTIONAL FIBRE-REINFORCED COMPOSITES UNDER BIAXIAL TRANSVERSE LOADS

Luis Távara (Universidad de Sevilla) Vladislav Mantic (Universidad de Sevilla) Enrique Graciani (Universidad de Sevilla) Federico París (Universidad de Sevilla)

 

Fibre-matrix interface debond onset and growth in a bundle of fibres are studied numerically. A fibre bundle subjected to far field biaxial transverse loads is considered. LEBIM is used to model the fibre-matrix interface cracks behaviour.

 

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LOAD TRANSFER IN A GRAPHENE/PDMS NANOCOMPOSITE UNDER NANOINDENTATION

Guoxin Cao (Peking University) Tianxiao Niu (Peking University) Chunyang Xiong (Peking University)

 

Indentation response of graphene/PDMS nanocomposite (graphene monolayer mounted on PDMS substrate) performed by atomic force microscopy (AFM) is investigated by both experiments and computational simulations.

 

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MICROMECHANICAL MODELLING AND SIMULATION OF TRIANGLE-SECTION CARBON FIBER REINFORCED POLYMER COMPOSITES

Lei Yang (Dalian University of Technology) Zhanjun Wu (Dalian University of Technology) Xin Liu (Dalian University of Technology)

 

The mechanical and damage behavior of unidirectional triangle-section fiber reinforced composites under transverse tension and compression were simulated, thus to reveal the effect of triangle-section fiber on the mechanical properties of CFRPs.

 

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MICROMECHANICAL MODELLING OF VISCOELASTIC-VISCOPLASTIC-DAMAGE BEHAVIOUR FOR POLYAMIDE WOVEN FABRIC COMPOSITES UNDER CYCLIC LOADING

Francis Praud (Arts et Metiers ParisTech) George Chatzigeorgiou (Arts et Métiers ParisTech) Yves Chemisky (Arts et Métiers ParisTech) Fodil Meraghni (Arts et Métiers ParisTech)

 

The cyclic behaviour of thermoplastic woven composites is modelled using a multi-scale approach based on the periodic homogenization method in which the microtructure eff_x000B_ects and the local behaviours of the matrix and the yarns are accounted.

 

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