Variation in mechanical properties of Hornbeam (Carpinus betulus L.) wood grown at different Region of Caspian Forests (North of Iran)
2006
Gol Baba`i, Fardad | Hossein Zadeh, A`bd Ol-Rahman | Khani, Hossein | Nur Bakhsh, Amir
To determine major engineering properties of Hornbeam wood (Carpinus betulus L.) in different Location of Caspian Forests (North of Iran), adopting ASTM (D-143) standard specification, the matched small clear specimens were prepared. The test materials were derived from randomly chosen trees. Mechanical and physical properties were measured on two moisture level: green and air-dried ( 12% moisture content). The influence of locations of specimens in height of tree trunks and geographical directions were tested on target properties. From the results of this study it could be concluded that, there was no significant differences between the geographical directions of pith for the most of the properties investigated. Static bending strengths of different location showed that strength of veisar is higher than the locations. Toughness was not influenced by moisture content. The average values of hardness of Hornbeam wood in transverse sections was the same as the other side in green condition, but air-drying caused increasing the value of cross-sections about 30%. The compression strength perpendicular to the grain had differences in wet and air-dry conditions. Based on the result of this study, Hornbeam wood of Veisar region (Carpinus betulus L.) had higher strength properties than the other regions.
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