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 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.

Keywords

Carbon fiber composite, Defect, Experimental mechanics, Modelling, Multiscale

DOI

10.3390/ma12121885

Citation

Antin, K N, Laukkanen, A, Andersson, T, Smyl, D & Vilaça, P 2019, ' A multiscale modelling approach for estimating the effect of defects in unidirectional carbon fiber reinforced polymer composites ', Materials, vol. 12, no. 12, 1885 . https://doi.org/10.3390/ma12121885

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https://urn.fi/URN:NBN:fi:aalto-201908154711

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[article-cris] Insinööritieteiden korkeakoulu / ENG

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A multiscale modelling approach for estimating the effect of defects in unidirectional carbon fiber reinforced polymer composites

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