1. Comparative analysis of thermally modified and native spruce loaded perpendicular to the grain
- Author
-
Beate Buchelt, Alexander Pfriem, Mario Zauer, André Wagenführ, Institute of Wood and Paper Technology, and Technische Universität Dresden = Dresden University of Technology (TU Dresden)
- Subjects
040101 forestry ,0106 biological sciences ,Materials science ,Scanning electron microscope ,Forestry ,04 agricultural and veterinary sciences ,Bending ,Thermal treatment ,01 natural sciences ,Radial direction ,Brittleness ,Flexural strength ,010608 biotechnology ,Physical Sciences ,Perpendicular ,Fracture (geology) ,0401 agriculture, forestry, and fisheries ,General Materials Science ,Composite material - Abstract
International audience; The aim of this work was to analyse the material behaviour of thermally modified and native spruce by load applied perpendicularly to the grain. Therefore, thermally modified and native samples were prepared for bending tests with the load in tangential direction. The bending strength in radial direction decreases significantly with the thermal treatment. The fracture surfaces in the tangential section of the bending samples after testing were analysed with a scanning electron microscope. For native samples, the typical failure was found in the intercellular area. For thermally modified samples, failure of the entire cell wall was observed. The material behaviour is more brittle, as demonstrated by the load-deflection curves, but also by anatomical studies of the fracture surfaces.
- Published
- 2010