NDLI: Elasto-capillary collapse of circular tubes as a model for cellulosic wood fibres

Content Provider	Springer Nature Link
Author	Soleimani, Majid Hill, Reghan J. Ven, Theo G. M.
Copyright Year	2015
Abstract	Wood-fibre conformation affects paper properties in various paper-product categories, such as packaging, printing, and absorbents. Qualitative investigations suggest that capillary forces play a crucial role in determining the fibre conformation upon drying. To quantify this process, we theoretically and experimentally investigate deformation of a circular tube under capillary pressure. Fibre pit holes, which impose a significant capillary pressure while drying, are modelled as circular holes in a tube. The calculations are undertaken by coupling the analytical solution for buckling a circular tube to numerical solutions of the Young–Laplace equation. This elasto-capillary model elucidates the influences of wetting angle, tube-wall flexibility, and hole size on the tube deformation. In experiments, flexible silicon-rubber tubes with a hole in the wall are filled with liquid, and the internal pressure is measured while withdrawing this fluid, thus mimicking evaporation during the drying of wood fibres. The results prove that capillarity can collapse the fibre lumen, either partially or completely, depending principally on the fibre-wall flexibility.
Starting Page	5337
Ending Page	5347
Page Count	11
File Format	PDF
ISSN	00222461
Journal	Journal of Materials Science
Volume Number	50
Issue Number	15
e-ISSN	15734803
Language	English
Publisher	Springer US
Publisher Date	2015-05-14
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Materials Science Characterization and Evaluation of Materials Polymer Sciences Continuum Mechanics and Mechanics of Materials Crystallography Mechanics
Content Type	Text
Resource Type	Article
Subject	Ceramics and Composites Mechanics of Materials Mechanical Engineering Polymers and Plastics

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