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Open AccessArticle

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

1
Department of Mechanical Engineering, Aalto University, Puumiehenkuja 3, 02150 Espoo, Finland
2
VTT Technical Research Centre of Finland, Kivimiehentie 3, 02044 VTT, Finland
3
Department of Civil and Structural Engineering, University of Sheffield, Mappin Street, Sheffield S13JD, UK
*
Author to whom correspondence should be addressed.
Materials 2019, 12(12), 1885; https://doi.org/10.3390/ma12121885
Received: 16 May 2019 / Revised: 6 June 2019 / Accepted: 10 June 2019 / Published: 12 June 2019
(This article belongs to the Special Issue Carbon Fiber Reinforced Polymers)
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. View Full-Text
Keywords: modelling; carbon fiber composite; experimental mechanics; multiscale; defect modelling; carbon fiber composite; experimental mechanics; multiscale; defect
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Antin, K.-N.; Laukkanen, A.; Andersson, T.; Smyl, D.; Vilaça, P. A Multiscale Modelling Approach for Estimating the Effect of Defects in Unidirectional Carbon Fiber Reinforced Polymer Composites. Materials 2019, 12, 1885.

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