Impact bending strength of thermally-modified timber
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F23%3A43924337" target="_blank" >RIV/62156489:43410/23:43924337 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1515/hf-2023-0046" target="_blank" >https://doi.org/10.1515/hf-2023-0046</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1515/hf-2023-0046" target="_blank" >10.1515/hf-2023-0046</a>
Alternative languages
Result language
angličtina
Original language name
Impact bending strength of thermally-modified timber
Original language description
The article offers a perspective on how thermal-modification affects the impact bending strength of five different wood species, an aspect that has not received as much attention as the well-studied static load behavior of thermally-modified timber (TMT). Since the TMTs are mainly employed as outdoor materials, where they may encounter impact forces, a comparative investigation into the flexibility and strength of these materials under impact is useful. This article evaluates different aspects of the TMT, such as deflection, strain in the impact region, the maximum force needed to initiate cracks, and the energy required for rupture. Wood planks from ash, beech, larch, oak, and spruce were thermally modified at 180 and 220 oC. They were cut into test specimens, while a separate set of unmodified specimens from each wood species served as the reference group. The specimens were subjected to an impact 3-point bending test, and an ultra-high-speed camera meticulously recorded the results. The images were processed by the digital image correlation (DIC) method to determine the deflection and strain distribution of the beams during the impact test. The deflection, maximum force, maximum longitudinal strain, and required work for rupture of each group were determined. The results showed that thermal-modification decreases the wood deflection and maximum longitudinal strain by approximately 50 %. In addition, the impact bending strength decreased by nearly 60 %. However, the impact bending strength did not exhibit a statistically significant decrease at 180 oC; in some cases, it even increased.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20502 - Paper and wood
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Holzforschung
ISSN
0018-3830
e-ISSN
1437-434X
Volume of the periodical
77
Issue of the periodical within the volume
11-12
Country of publishing house
DE - GERMANY
Number of pages
10
Pages from-to
828-837
UT code for WoS article
001102723900001
EID of the result in the Scopus database
2-s2.0-85176441837