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Friction correction when predicting wood basic density using drilling resistance


Gendvilas, V and Downes, GM and Neyland, M and Hunt, M and Jacobs, A and O'Reilly-Wapstra, J, Friction correction when predicting wood basic density using drilling resistance, Holzforschung, 75, (6) pp. 508-516. ISSN 0018-3830 (2021) [Refereed Article]


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© 2020 Walter de Gruyter GmbH, Berlin/Boston

DOI: doi:10.1515/hf-2020-0156


Basic density is a fundamental wood property of pulp and sawn wood. An IML Resi PD 400 drilling resistance tool (IML System GmbH, Wiesloch, Germany) was used to evaluate the basic density of Eucalyptus nitens discs and the impact of needle friction on basic density prediction. To determine the accuracy of that prediction with the commonly used linear drill bit shaft friction correction and determine whether this correction is linear, 40 discs were drilled radially, then cut into segments which were measured for basic density. Drilling resistance had a strong relationship with basic density in the outer wood; it was weaker at the pith but this did not compromise prediction accuracy. When using a linear friction correction, the drilling resistance underpredicts basic density by 7.6% in the first 2–3 cm after stem entry, after which the prediction error ranged from 0.6–1.9%. The friction correction was found to be nonlinear, especially at the first few centimeters. To apply this friction correction, basic density values from the model should be added to predict basic density values until 2.9 cm from Resi entry point and after that subtracted to account for the drill bit shaft friction.

Item Details

Item Type:Refereed Article
Keywords:basic density, drill bit shaft friction, Eucalyptus nitens, IML Resinon, destructive wood testing, friction, models, pith, prediction, pulp, wood
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Forestry sciences
Research Field:Wood processing
Objective Division:Plant Production and Plant Primary Products
Objective Group:Forestry
Objective Field:Hardwood plantations
UTAS Author:Gendvilas, V (Mr Vilius Gendvilas)
UTAS Author:Neyland, M (Dr Mark Neyland)
UTAS Author:Hunt, M (Professor Mark Hunt)
UTAS Author:O'Reilly-Wapstra, J (Professor Julianne O'Reilly-Wapstra)
ID Code:147170
Year Published:2021
Funding Support:Australian Research Council (IC150100004)
Web of Science® Times Cited:7
Deposited By:Office of the School of Natural Sciences
Deposited On:2021-10-15
Last Modified:2022-05-18
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