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A numerical and experimental study regarding the influence of some process parameters on the damage state in wood chips
Uppsala Univ, Angstrom Lab, SE-75121 Uppsala, Sweden.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. (FSCN)
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences. (FSCN)
2013 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 67, no 6, p. 691-696Article in journal (Refereed) Published
Abstract [en]

The specific energy consumption during mechanical refining operation can be reduced by choosing the optimal process parameters in the wood chipping process such that a beneficial pretreatment is obtained. In the case of the utilization of a larger knife-edge angle, which is one such process parameter, the energy reduction is presumably due to the increased compressive loading parallel to the wood fibers. In the present article, a chip damage parameter D of spruce is in focus, which is relevant for cracking parallel to the fibers. D is defined and its dependence on the chip length and edge angle of the chipping knife is analyzed numerically by means of finite element analyses (FEA). The cutting force was measured in a pilot wood chipper for a number of knife-edge angles. There is a good correlation between the experimental results and those of FEA.

Place, publisher, year, edition, pages
2013. Vol. 67, no 6, p. 691-696
Keywords [en]
chipping process, finite element analysis (FEA), knife angle, numerical analyses, pretreatment of chips, wood chips
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:miun:diva-20648DOI: 10.1515/hf-2012-0142ISI: 000324719100010Scopus ID: 2-s2.0-84906960697OAI: oai:DiVA.org:miun-20648DiVA, id: diva2:678295
Available from: 2013-12-11 Created: 2013-12-11 Last updated: 2017-12-06Bibliographically approved

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Gradin, Per A.Hellström, Lisbeth M.

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