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Method for the calculation of the physical and mechanical properties of softwood

: Guindos, P.; Rüther, N.

Volltext ()

TU Wien:
WCTE 2016, World Conference on Timber Engineering : August 22-25, 2016, Vienna, Austria, CD-ROM Proceedings
Vienna, 2016
ISBN: 978-3-903039-00-1 (CD-ROM)
ISBN: 978-3-903024-35-9 (e-Book)
World Conference on Timber Engineering (WCTE) <2016, Vienna>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer WKI ()

This research presents an integral calculation method (ICM) for estimating the fundamental physical and mechanical properties of softwood. The method is based upon physical measurements on the logs and consists of two basic calculation phases. In the first phase, the fibre orientation and the corresponding material properties of the wood are analytically calculated for the entire log. In the second phase, this data is imported into a finite element analysis, which serves for predicting the physical and mechanical response of either the entire log or the sawn lumber. The method has been validated against 32 lumber boards in bending which resulted in an absolute numerical error of 10.2% on failure prediction. In addition, the calculation method performed robustly and fast. It is therefore expected that the method can contribute not only to lumber grading and research, but to optimize the industrial logging and sawing processes.