Reološke lastnosti termo-hidro-mehansko (THM) obdelanega lesa / Rhelogical properties of Thermo-Hydro-Mechanical (THM) treated wood
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Naziv Tittle |
Reološke lastnosti termo-hidro-mehansko (THM) obdelanega lesa / Rhelogical properties of Thermo-Hydro-Mechanical (THM) treated wood |
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Akronim Acronim |
Z4-5520 |
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Opis Description |
(SI) Podnebne spremembe in njene katastrofalne posledice spodbujajo k trajnostnemu razvoju, pri katerem je ključno povečanje odgovornosti do okolja oziroma zaščite okolja, povečanje ekonomske učinkovitosti in izboljšanje socialne varnosti ljudi. Les kot obnovljivi material oziroma njegova vsestranska uporaba zato pridobiva na pomembnosti. Ena izmed okolju prijaznih metod modifikacije lesa je uporaba toplote, vlage in mehanske sile, kar imenujemo termo-hidro-mehanske (THM) obdelave. Splošni cilj predlaganega projekta je boljše razumevanje lastnosti tega »novega« materiala, zgoščenega lesa, medtem ko je primarni cilj predlaganega projekta raziskati časovno odvisno obnašanje zgoščenega lesa pod upogibno obremenitvijo pri različnih temperaturah in vlažnostih, s sledečimi specifičnimi cilji:
- 1. proučiti odnos med lezno deformacijo in gostoto zgoščenega lesa
- 2. razviti model za predvidevanje časovno odvisnega obnašanja zgoščenega lesa
- 3. določiti časovno odvisno obnašanje večslojnih kompozitov narejenih iz zgoščenega lesa.
- 4. proučevati viskoelastično obnašanje zgoščenega lesa z dinamično analizo mehanskih lastnosti (dynamic mechanical analysis, DMA)
Predlagani projekt bo izveden v sodelovanju z Oregon State University (ZDA), Aalto University (Finska) in EMPA (Švica). Proučevani lesni vrsti lesa bosta najpomembnejši slovenski iglavec in listavec, smrekovina in bukovina. Na obeh preučevanih lesnih vzorcih bomo uporabili tri različne stopnje zgostitve. Pričakovani rezultati predlaganega projekta bodo prispevali k skupnim prizadevanjem znanosti o lesu k razumevanju obnašanja zgoščenega lesa. (EN) Climate change and its catastrophic consequences are driving the drive towards sustainable development, where the key is to increase environmental responsibility or protection, increase economic efficiency and improve people's social security. Wood as a renewable material, or its versatile use, is therefore gaining in importance. One environmentally friendly method of modifying wood is the use of heat, moisture and mechanical force, known as thermo-hydro mechanical (THM) treatments. The general objective of the proposed project is to better understand the properties of this "new" material, densified wood, while the primary objective of the proposed project is to investigate the time-dependent behaviour of densified wood under bending load at different temperatures and humidities, with the following specific objectives: - 1. To investigate the relationship between creep strain and density of densified wood - 2. To develop a model to predict the time-dependent behaviour of densified wood - 3. To determine the time-dependent behaviour of multilayer composites made of densified wood - 4. To study the viscoelastic behaviour of densified wood by dynamic mechanical analysis (DMA) The proposed project will be carried out in collaboration with Oregon State University (USA), Aalto University (Finland) and EMPA (Switzerland). The timber species to be studied will be the most important Slovenian coniferous and deciduous woods, spruce and beech. Three different levels of densification will be applied to the two studied wood samples. The expected results of the proposed project will contribute to the joint efforts of wood science to understand the behaviour of densified wood. |
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Vrsta projekta Project Type |
Podoktorski projekt |
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Trajanje Duration |
01/08/2013 - 31/07/2015 |
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URL URL |
http://www.sicris.si/search/prj.aspx?lang=slv&id=8745 |
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Vodja projekta Project Leader |
dr. Andreja Kutnar |
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Sodelujoče organizacije Participating organizations |
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Oddelek Department |
Oddelek za tehnologijo IAM |