A Multiscale Modelling Approach for Estimating the Effect of Defects in Unidirectional Carbon Fiber Reinforced Polymer Composites

A multiscale modelling approach was developed in order to estimate the effect of defects on the strength of unidirectional carbon fiber composites. The work encompasses a micromechanics approach, where the known reinforcement and matrix properties are experimentally verified and a 3D finite element...

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Bibliographic Details
Published in:Materials 2019-06, Vol.12 (12), p.1885
Main Authors: Antin, Kim-Niklas, Laukkanen, Anssi, Andersson, Tom, Smyl, Danny, Vilaça, Pedro
Format: Article
Language:English
Subjects:
Boundary conditions
Calibration
Carbon fiber reinforced plastics
Carbon fiber reinforcement
Civil engineering
Composite beams
Composite materials
Computer simulation
Defects
Fiber composites
Fiber reinforced polymers
Finite element method
International organizations
Mathematical models
Micromechanics
Microstructure
Modelling
Parameter estimation
Photomicrographs
Polymer matrix composites
Porosity
Shear strength
Stress concentration
Three dimensional models
Unidirectional composites
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Summary:A multiscale modelling approach was developed in order to estimate the effect of defects on the strength of unidirectional carbon fiber composites. The work encompasses a micromechanics approach, where the known reinforcement and matrix properties are experimentally verified and a 3D finite element model is meshed directly from micrographs. Boundary conditions for loading the micromechanical model are derived from macroscale finite element simulations of the component in question. Using a microscale model based on the actual microstructure, material parameters and load case allows realistic estimation of the effect of a defect. The modelling approach was tested with a unidirectional carbon fiber composite beam, from which the micromechanical model was created and experimentally validated. The effect of porosity was simulated using a resin-rich area in the microstructure and the results were compared to experimental work on samples containing pores.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12121885