Determining the number of fibre-fibre contacts in cardboard samples using tomographic imaging

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dc.contributor.author Ekman, Axel
dc.date.accessioned 2012-02-20T09:11:22Z
dc.date.available 2012-02-20T09:11:22Z
dc.date.issued 2011
dc.identifier.uri http://urn.fi/URN:NBN:fi:jyu-201202201224 en
dc.identifier.uri http://hdl.handle.net/123456789/37417
dc.description.abstract The fibrous network of cardboard samples was studied with the aid of tomographic imaging. For analysing the samples a method of determing the number of contacts between fibres in a planar fibrous network was introduced. The model is based on the fact that deposited paper-like structures tend to have predominantly planar fibre orientation. With this assumption an expression of the mean segment length was derived in terms of the average shortest path along fibres through the sample in the out-of-plane direction. The density profiles of cardboard samples were analysed by determing four quantitative features, the solids content, standard deviation of the solids content, slope and curvature. All the samples had a slope in the same direction, i.e., they were denser at the bottom surfaces. Densification seems to occur at both surfaces, as the curvature was larger for samples with higher solids content. Our measurements indicate that contact densities of the cardboards, i.e., the number of fibre-fibre contacts per unit volume are proportional to the square of the solids content. This is in agreement with earlier models for three-dimensional fibre networks.
dc.format.extent 64 s.
dc.language.iso eng
dc.rights This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. en
dc.rights Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. fi
dc.title Determining the number of fibre-fibre contacts in cardboard samples using tomographic imaging
dc.type Book en
dc.identifier.urn URN:NBN:fi:jyu-201202201224
dc.subject.ysa fysiikka
dc.subject.ysa tomografia
dc.subject.ysa kuidut
dc.type.dcmitype Text en
dc.type.ontasot Pro gradu fi
dc.type.ontasot Master’s thesis en
dc.contributor.tiedekunta Matemaattis-luonnontieteellinen tiedekunta fi
dc.contributor.tiedekunta Faculty of Mathematics and Science en
dc.contributor.laitos Fysiikan laitos fi
dc.contributor.laitos Department of Physics en
dc.contributor.yliopisto University of Jyväskylä en
dc.contributor.yliopisto Jyväskylän yliopisto fi
dc.contributor.oppiaine fysiikka
dc.date.updated 2012-02-20T09:11:22Z

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