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Using acoustic emission monitoring to evaluate the through the thickness and in plane strength properties
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics. (FSCN)
2009 (English)In: Proceedings - 2009 International Mechanical Pulping Conference, IMPC 2009, 2009, p. 298-303Conference paper, Published paper (Refereed)
Abstract [en]

To shed some light on the deformation or damage processes active when paper made from carefully refined TMP long fibres and its fine material is loaded in the Z-direction and in-plane direction, specially designed grips with integrated acoustic emission sensors (AE sensors) were used to study the onset and progression of fracture. In this paper, experimental results from both Z-direction and in-plane tensile tests on three fractions of two TMP reject pulps are presented and discussed. Critical load, i.e. the load where fibre-fibre bonds starts to break, was shown to be approximately 80% of max strength and relatively independent of fine material content both in Z-direction and in-plane direction. In in-plan tensile fracture the fibre-fibre bonds are subjected to shear forces in contrast to loadings in through the thickness direction, where the bonds are loaded in a tensile mode. Addition of fines to the refined long fibre of the TMP reject has an evident effect of the bonds when loading in Z-direction, whereas the effect when loading in-plane is just marginal.

 

 

Place, publisher, year, edition, pages
2009. p. 298-303
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:miun:diva-11830Scopus ID: 2-s2.0-77951134624OAI: oai:DiVA.org:miun-11830DiVA, id: diva2:329717
Conference
2009 International Mechanical Pulping Conference, IMPC 2009; Sundsvall; 31 May 2009 through 4 June 2009
Available from: 2010-07-13 Created: 2010-07-13 Last updated: 2010-07-13Bibliographically approved

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Norgren, SvenGradin, Per

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CiteExportLink to record
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Citation style
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  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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  • html
  • text
  • asciidoc
  • rtf