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Bubble motion through non-crimp fabrics during composites manufacturing
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-1033-0244
University of Latvia.
2008 (English)In: Composites. Part A, Applied science and manufacturing, ISSN 1359-835X, E-ISSN 1878-5840, Vol. 39, no 2, p. 243-251Article in journal (Refereed) Published
Abstract [en]

Bubbles motion through inter bundle channels in bi-axial non crimp fabrics is modelled. The scenario is that formed bubbles move with the resin through these channels and are trapped if the channels become too narrow. By usage of a permeability network model, existing criteria on bubble deformation and a variety of analytical and probabilistic methods it is found that the paths of the bubbles depend significantly on the position of the threads keeping the fabric together and the number of fibres crossing the interbundle channels. Another result is that the pressure difference over a trapped bubble increases with 50 % in a 3D geometry possible helping the bubble to escape. A third result is that, on average, the bubbles move biased to the direction of the tows. Finally it is found that the predicted void distribution of bubbles after a major part of bubbles have moved through the system are in qualitative agreement with experimental data.

Place, publisher, year, edition, pages
2008. Vol. 39, no 2, p. 243-251
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-4122DOI: 10.1016/j.compositesa.2007.10.020ISI: 000253569700010Scopus ID: 2-s2.0-38749119754Local ID: 200b26d0-71c5-11dc-86ab-000ea68e967bOAI: oai:DiVA.org:ltu-4122DiVA, id: diva2:976986
Note
Validerad; 2008; 20071003 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Frishfelds, VilnisLundström, Staffan

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  • apa
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Output format
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