caa a22 4500 463216733 CHVBK 20180405153159.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s00226-006-0114-5 doi (NATIONALLICENCE)springer-10.1007/s00226-006-0114-5 Hernández Roger Département des Sciences du Bois et de la Forêt, Faculté de Foresterie et de Géomatique, Université Laval, G1K 7P4, Québec, QC, Canada aut Influence of accessory substances, wood density and interlocked grain on the compressive properties of hardwoods [Elektronische Daten] [Roger Hernández] Wood samples of nine tropical hardwoods from Peru and sugar maple wood from Quebec were selected to perform moisture sorption tests associated with parallel-to-grain and tangential compression tests using a multiple step procedure at 25°C. Cold-water and hot-water extractives, sequential cyclohexane (CYC), acetone (ACE) and methanol (MET) extracts, ash content (ASH), wood density and interlocked grain (IG) were evaluated on matched samples too. Wood density corrected for the accessory substances was by far the major factor positively affecting the compressive properties of tropical hardwoods. The total amount of accessory substances is required in order to establish better relationships between physico-mechanical properties and density of tropical hardwoods. For a given wood density, the ultimate stress in parallel-to-grain compression was higher in tropical hardwoods than in temperate hardwoods. However, the compliance coefficients for both types of woods were quite similar. Sequential extraction with organic solvents was the most suitable method for evaluating the effect of extractives on compressive properties of tropical hardwoods. The CYC and ACE fractions did not contribute to variation in these mechanical properties. The substances dissolved in MET affected positively the compliance coefficient s 11 in parallel-to-grain compression and negatively the compliance coefficient s 33 in tangential compression. The IG decreased the compliance coefficient s 11 but also decreased the ultimate stress in parallel-to-grain compression. Finally, variations in compressive properties that were due to changes in equilibrium moisture content (EMC) were clearly influenced by wood density; denser woods were more sensitive to changes in EMC than lighter woods. Springer-Verlag, 2006 Wood Science and Technology Springer-Verlag 41/3(2007-03-01), 249-265 0043-7719 41:3<249 2007 41 226 https://doi.org/10.1007/s00226-006-0114-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00226-006-0114-5 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hernández Roger Département des Sciences du Bois et de la Forêt, Faculté de Foresterie et de Géomatique, Université Laval, G1K 7P4, Québec, QC, Canada aut NATIONALLICENCE 773 0- Wood Science and Technology Springer-Verlag 41/3(2007-03-01), 249-265 0043-7719 41:3<249 2007 41 226 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer