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Prediction of the off-axis stress-strain relation of wood under compression loading

Spannungs-Dehnungs-Diagramm von Holz bei Druckbeanspruchung unter einem Winkel zwischen Kraft- und Faserrichtung

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Abstract

Uniaxial compression tests were conducted using specimens of agathis (Agathis sp.) and katsura (Cercidiphyllum japonicum Sieb. et Zucc.) with various values of off-axis angle, defined as the angle between the grain axis and the axis along the loading direction. The obtained stress-strain relation was regressed into Ramberg–Osgood’s equation, and it was predicted by approximating the relationship between the parameters contained in the regressed equation and off-axis angle into Hankinson’s formula. The comparisons between the stress-strain relations obtained by the experiment and prediction revealed that the off-axis compression stress-strain relation can be predicted effectively using the relations in the orthotropic axes.

Zusammenfassung

Durchgeführt wurden einachsige Druckversuche an Agathis- (Agathis sp.) und Katsuraproben (Cercidiphyllum japonicum Sieb. et Zucc.) bei verschiedenen Winkeln zwischen Kraft- und Faserrichtung. Zur Bestimmung des Spannungs-Dehnungs-Diagramms wurden die Parameter der Ramberg–Osgood-Gleichung zunächst mittels einer Regressionsrechnung bestimmt und dann unter Verwendung der Hankinson-Gleichung mit dem Winkel zwischen Kraft- und Faserrichtung in Beziehung gesetzt. Der Vergleich zwischen den experimentell bestimmten und den berechneten Spannungs-Dehnungs-Diagrammen ergab, dass eine Spannungs-Dehnungs-Kurve bei Druckbeanspruchung bei unterschiedlichen Winkeln zwischen Kraft- und Faserrichtung sehr gut aus den Ergebnissen in den orthotropen Achsen, d.h. in Faserrichtung und quer zur Faserrichtung, bestimmt werden kann.

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  1. Faculty of Science and Engineering, Shimane University, Nishikawazu-cho 1060, 690-8504, Matsue, Shimane, Japan

    Hiroshi Yoshihara

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  1. Hiroshi Yoshihara
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Correspondence to Hiroshi Yoshihara.

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Yoshihara, H. Prediction of the off-axis stress-strain relation of wood under compression loading . Eur. J. Wood Prod. 67, 183–188 (2009). https://doi.org/10.1007/s00107-009-0320-6

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  • DOI: https://doi.org/10.1007/s00107-009-0320-6

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