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Comparison of the TL-Shear Strength of Normal and Compression Wood of European Larch
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W. Gindl
Published/Copyright:
June 1, 2005
Summary
The strength of larch compression wood specimens in longitudinal shear in the radial plane was determined and compared to normal wood. Fracture surfaces were examined with a scanning electron microscope. Compression wood showed higher shear strength than normal wood. The difference persisted after correction of the strength values for density. Scanning electron microscopy revealed clear differences in the pattern of failure in normal wood compared to compression wood. While transwall and intrawall fracture predominate in normal wood, intercell fracture at the middle lamella occurs in compression wood. An explanation of this change in fracture behaviour is proposed in terms of microfibril angle and lignification of the cell wall.
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Published Online: 2005-06-01
Published in Print: 2003-06-26
Copyright © 2003 by Walter de Gruyter GmbH & Co. KG
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- Detection and Species Identification of Wood-Decaying Fungi by Hybridization of Immobilized Sequence-Specific Oligonucleotide Probes with PCR-Amplified Fungal Ribosomal DNA Internal Transcribed Spacers
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- Phenolic and Lipophilic Extractives in Scots Pine Knots and Stemwood
- Chemical Characterisation of Wood of Roman Ships Brought to Light in the Recently Discovered Ancient Harbour of Pisa (Tuscany, Italy)
- Lignin Structures in Normal and Compression Wood. Evaluation by Thioacidolysis Using Ethanethiol and Methanethiol
- Lignin-Carbohydrate Condensation Product Formation in a Biomimetic Model Pulp Bleaching System
- Viscoelastic Behaviour of Wood Fibres during the Hot Pressing of Medium Density Fibreboard
- Measuring Relative Fibre Length in Scots Pine by Non-Destructive Wood Sampling
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