Conference Publication Details
Mandatory Fields
David Gil-Moreno; Conan O'Ceallaigh; Dan Ridley-Ellis; Annette Harte
21st International Nondestructive Testing and Evaluation of Wood Symposium
Use of Nondestructive Techniques for Determination of Tension Parallel-to-Grain Properties of Spruce
2019
September
Published
0
()
Optional Fields
grading, NDT, sawn timber, spruce, tension, wood properties, strength, standards
Forest Service, Forest Products Laboratory
233
240
Freiburg
25-SEP-19
27-SEP-19
The paper presents a study of the tension properties of Irish-grown Sitka spruce. Fifty timber pieces were destructively tested having resonant frequency and knots measured. The aim was to improve knowledge of the performance of spruce in tension and to check the suitability of the equations given in the European standards to calculate secondary properties from grade determining properties. Static stiffness, whichlimited the grading of the dataset, was largely predicted using dynamic modulus of elasticity (MoEdyn). Tension strength was modelled using density and tKAR index. It was found also that adding MoEdyn in a linear regression was not useful. The research reveals that the equation given in EN384:2018 for tension strength, based on populations of higher stiffness than Irish spruce, results in values that may not be appropriate for Irish-grown spruce timber.
Department of Agriculture, Food and the Marine, Ireland
Grant Details
Publication Themes
Biomedical Science and Engineering