Conradsen, Knut

Dahl, Anders Bjorholm

Dahl, Vedrana Andersen

Emerson, Monica Jane

Mikkelsen, Lars Pilgaard

We have developed an image analysis pipeline1 that can extract individual fibre tracksfrom low contrast X-ray tomograms of unidirectional composites with high fibre volumefraction. Measuring individual fibre tracks opens up the possibility of modelling thisempirical data in a statistical manner. Thus, allowing to analyse the spatial distributionsof the parameters characterising the orientation and curvature of these individual fibres,which can also provide insights on the interactions amongst the individual fibres.Finite element models (FEMs) can be built from the extracted geometry to simulatethe performance of the scanned fibre structure under realistic conditions. Moreover, as-pects of the fibre architecture that inuence the macroscopic behaviour of the compositecan be quantified. Examples are 2D FEMs to predict the transverse stifiness or the quantification of fibre orientations to estimate the compression strength.1 And last butnot least, already developed analytical and numerical models to describe the composite'sbehaviour can be validated against the observed data

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 16, 2017Geometrical Characterisation of Individual Fibres From X-Ray TomogramsEmerson, Monica Jane; Dahl, Vedrana Andersen; Mikkelsen, Lars Pilgaard; Dahl, Anders Bjorholm;Conradsen, KnutPublished in:Proceedings of the 30th Nordic Seminar on Computational Mechanics (NSCM-30)Publication date:2017Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Emerson, M. J., Dahl, V. A., Mikkelsen, L. P., Dahl, A. B., & Conradsen, K. (2017). Geometrical Characterisationof Individual Fibres From X-Ray Tomograms. In J. Høsberg, & N. L. Pedersen (Eds.), Proceedings of the 30thNordic Seminar on Computational Mechanics (NSCM-30) (pp. 59)30th Nordic Seminar on Computational Mechanics NSCM-30 J. Høgsberg. N.L. Pedersen (Eds.)2017GEOMETRICAL CHARACTERISATION OF INDIVIDUALFIBRES FROM X-RAY TOMOGRAMSMONICA J. EMERSON ∗†, VEDRANA A. DAHL†, LARS P.MIKKELSEN‡, ANDERS B. DAHL† AND KNUT CONRADSEN††Image Analysis and Computer GraphicsDepartment of Applied Mathematics and Computer Science, Technical University of Denmarke-mail: monj@dtu.dk‡Composites and Materials MechanicsDepartment of Wind Energy, Technical University of DenmarkAbstract. Numerous modelling possibilities are opened up by an advanced image anal-ysis pipeline that can accurately extract individual fibres from X-ray tomograms.Keywords: X-ray tomography, Individual Fibres, Unidirectional Composites, Modelling.We have developed an image analysis pipeline1 that can extract individual fibre tracksfrom low contrast X-ray tomograms of unidirectional composites with high fibre volumefraction. Measuring individual fibre tracks opens up the possibility of modelling thisempirical data in a statistical manner. Thus, allowing to analyse the spatial distributionsof the parameters characterising the orientation and curvature of these individual fibres,which can also provide insights on the interactions amongst the individual fibres.Finite element models (FEMs) can be built from the extracted geometry to simulatethe performance of the scanned fibre structure under realistic conditions. Moreover, as-pects of the fibre architecture that influence the macroscopic behaviour of the compositecan be quantified. Examples are 2D FEMs to predict the transverse stiffness2 or thequantification of fibre orientations to estimate the compression strength.1 And last butnot least, already developed analytical and numerical models to describe the composite’sbehaviour can be validated against the observed data.REFERENCES[1] Emerson, M. J., Jespersen, K. M., Dahl, A. B., Conradsen, K. & Mikkelsen, L. P.Individual fibre segmentation from 3d x-ray computed tomography for characterisingthe fibre orientation in unidirectional composite materials. Composites Part A: AppliedScience and Manufacturing 97, 83–92 (2017).[2] Mikkelsen, L. P. et al. X-ray based micromechanical finite element modeling of compos-ite materials. In In Proceedings of 29th Nordic Seminar on Computational Mechanics(2016).59

Geometrical Characterisation of Individual Fibres From X-Ray Tomograms

http://orbit.dtu.dk/ws/files/140258082/GEOMETRICAL_CHARACTERISATION.pdf

Geometrical Characterisation of Individual Fibres From X-Ray Tomograms

Abstract

Similar works

Full text

Available Versions

Online Research Database In Technology