| Title |
Comparison of viscous elastic properties in wood of leaf and coniferous tree |
| Another Title |
Lapuočių ir spygliuočių medienos tampriai plastinių savybių palyginimas. |
| Authors |
Vobolis, Jonas ; Albrektas, Darius |
| Full Text |
|
| Is Part of |
Materials science = Medžiagotyra.. Kaunas : Technologija. 2007, vol. 13, no. 2, p. 147-151.. ISSN 1392-1320. eISSN 2029-7289 |
| Keywords [eng] |
Dynamical modulus of elasticity ; Coefficient of damping ; Resonance vibration ; Spruce and oak wood assortments |
| Abstract [eng] |
The mechanical properties of wood polymeric system are defined in terms of viscous elastic materials. These properties have an impact on relaxation processes for both wooden specimens and wooden articles. In this paper the method of estimation of dynamic modulus of elasticity and coefficient of damping based on resonance vibration is presented. All sorts of trees by wood structure may be classified into leaf and coniferous tree. The structure of wood determines their different properties. Therefore in many cases leafy and coniferous trees are used in different purposes. Spruce (coniferous tree) and oak (leaf tree) wood specimens have been used in the investigation and the viscous elastic properties of these wood types were compared together. The specimens were sawn from three places of central and side boards and they were relatively called “butt-end”, “center” and “topend”. It was found that modulus of elasticity in central and side boards of oak and spruce varied conversely – in center of oak boards the modulus of elasticity is highest, in center of spruce boards the modulus of elasticity is lowest. The coefficient of damping in both central and side boards of oak and side boards of spruce varied analogically. |
| Published |
Kaunas : Technologija |
| Type |
Journal article |
| Language |
English |
| Publication date |
2007 |
| CC license |
|
