Strain transfer from xylem to bark surface analyzed by digital image correlation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F16%3A00458399" target="_blank" >RIV/68378297:_____/16:00458399 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/62156489:43410/16:43909242

Výsledek na webu

<a href="http://link.springer.com/article/10.1007%2Fs00226-016-0819-z" target="_blank" >http://link.springer.com/article/10.1007%2Fs00226-016-0819-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00226-016-0819-z" target="_blank" >10.1007/s00226-016-0819-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Strain transfer from xylem to bark surface analyzed by digital image correlation

Popis výsledku v původním jazyce

The goal of the study was to investigate the influence of bark of Turkish hazel (Corylus colurna L.) on strain transfer from xylem to bark surface. The study addresses issues of tree biomechanics that calls for a high-quality deformation data measured on trees’ surfaces in a noninvasive way. For these purposes, the optical technique employing 3D digital image correlation (3D-DIC) was used and tested against extensometers commonly used for such applications. The measured tree was subjected to bending by two pulling tests to induce the strain in tree stem, during which the analyzed area of interest (AOI) on the tree was studied in both variants with and without bark. The DIC technique successfully provided strain fields on a tree with bark and without despite its highly complicated structure. The absolute values of vertical strain measured by both techniques agree with each other in order of magnitude. However, 3D-DIC returns generally lower values than extensometers. Statistical tests proved (at p.05) that the vertical strain measured on a bark wasnlower than that measured on wood, which confirms the hypothesis that bark layers reduce the strain transfer from wood to tree surface. The extent of strain reduction is highly dependent on force and was statistically detectable when the force reached ca. 5 kN. This is an important fact especially for practical use of optical measurements that are to replace standard extensometers. Measured displacements agreed with each other for both variants within a whole range of loads.

Název v anglickém jazyce

Strain transfer from xylem to bark surface analyzed by digital image correlation

Popis výsledku anglicky

The goal of the study was to investigate the influence of bark of Turkish hazel (Corylus colurna L.) on strain transfer from xylem to bark surface. The study addresses issues of tree biomechanics that calls for a high-quality deformation data measured on trees’ surfaces in a noninvasive way. For these purposes, the optical technique employing 3D digital image correlation (3D-DIC) was used and tested against extensometers commonly used for such applications. The measured tree was subjected to bending by two pulling tests to induce the strain in tree stem, during which the analyzed area of interest (AOI) on the tree was studied in both variants with and without bark. The DIC technique successfully provided strain fields on a tree with bark and without despite its highly complicated structure. The absolute values of vertical strain measured by both techniques agree with each other in order of magnitude. However, 3D-DIC returns generally lower values than extensometers. Statistical tests proved (at p.05) that the vertical strain measured on a bark wasnlower than that measured on wood, which confirms the hypothesis that bark layers reduce the strain transfer from wood to tree surface. The extent of strain reduction is highly dependent on force and was statistically detectable when the force reached ca. 5 kN. This is an important fact especially for practical use of optical measurements that are to replace standard extensometers. Measured displacements agreed with each other for both variants within a whole range of loads.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

AL - Umění, architektura, kulturní dědictví

OECD FORD obor

—

Projekt

<a href="/cs/project/EE2.3.20.0269" target="_blank" >EE2.3.20.0269: Vytvoření mezinárodního vědecko-výzkumného týmu pro vývoj nových materiálů na bázi dřeva</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Wood Science and Technology

ISSN

0043-7719

e-ISSN

—

Svazek periodika

50

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

773-787

Kód UT WoS článku

000378004300010

EID výsledku v databázi Scopus

2-s2.0-84962176118