Effect of Green Density Values on Pinus radiata Stiffness Estimation using a Stress-wave Technique
Wielinga, Benjamin; Raymond, Carolyn; James, Ryde; Matheson, A. Colin
Description
Use of acoustic tools for assessing stiffness of green wood in standing trees relies on the assumption of a constant value for wood density. This study examined the variability in the green density of the outerwood (outer 5 rings) of 13-year-old Pinus radiata D.Don trees and determined the error introduced by using a constant value. Assuming a constant green density introduced a small (~3%) error in the calculated modulus of elasticity (i.e. density 'as measured' x acoustic velocity2). Acoustic...[Show more]
dc.contributor.author | Wielinga, Benjamin | |
---|---|---|
dc.contributor.author | Raymond, Carolyn | |
dc.contributor.author | James, Ryde | |
dc.contributor.author | Matheson, A. Colin | |
dc.date.accessioned | 2015-12-07T22:38:40Z | |
dc.identifier.issn | 0048-0134 | |
dc.identifier.uri | http://hdl.handle.net/1885/23529 | |
dc.description.abstract | Use of acoustic tools for assessing stiffness of green wood in standing trees relies on the assumption of a constant value for wood density. This study examined the variability in the green density of the outerwood (outer 5 rings) of 13-year-old Pinus radiata D.Don trees and determined the error introduced by using a constant value. Assuming a constant green density introduced a small (~3%) error in the calculated modulus of elasticity (i.e. density 'as measured' x acoustic velocity2). Acoustic velocity was the dominant term in the equation. Green density of the fresh core samples showed little variation (coefficient of variation = 2.8%) and was more strongly determined by the sample's moisture saturation than the amount of wood material (basic density). Modulus of elasticity was inversely related to diameter at 1.3 m (R2 = 0.20). Basic density and fresh moisture content were inversely related (R2 = 0.82). Basic density and fresh moisture content both influenced the acoustic velocity (R2 ~ 0.07), but their effects were weak and opposite. The effect on the acoustic velocity of fresh moisture content at a level between 110% and 230% was less than found previously at lower fresh moisture contents. | |
dc.publisher | Scion | |
dc.source | New Zealand Journal of Forestry Science | |
dc.subject | Keywords: Basic density; Dynamic modulus of elasticity; Moisture content; Pinus radiata; Standing tree acoustic tools; Acoustic wave velocity; Acoustic wave velocity measurement; Acoustics; Elastic moduli; Elasticity; Moisture; Moisture determination; Stiffness; Fo Basic density; Dynamic modulus of elasticity; Moisture content; Pinus radiata; Standing tree acoustic tools | |
dc.title | Effect of Green Density Values on Pinus radiata Stiffness Estimation using a Stress-wave Technique | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 39 | |
dc.date.issued | 2009 | |
local.identifier.absfor | 070508 - Tree Nutrition and Physiology | |
local.identifier.ariespublication | u4474437xPUB27 | |
local.type.status | Published Version | |
local.contributor.affiliation | Wielinga, Benjamin, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | Raymond, Carolyn, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | James, Ryde, College of Medicine, Biology and Environment, ANU | |
local.contributor.affiliation | Matheson, A. Colin, College of Medicine, Biology and Environment, ANU | |
local.description.embargo | 2037-12-31 | |
local.bibliographicCitation.startpage | 71 | |
local.bibliographicCitation.lastpage | 79 | |
dc.date.updated | 2016-02-24T11:09:36Z | |
local.identifier.scopusID | 2-s2.0-67650902375 | |
Collections | ANU Research Publications |
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