Using 3D digital image correlation in an identification of defects of trees subjected to bending

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F19%3A43916627" target="_blank" >RIV/62156489:43410/19:43916627 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.ufug.2019.126513" target="_blank" >https://doi.org/10.1016/j.ufug.2019.126513</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ufug.2019.126513" target="_blank" >10.1016/j.ufug.2019.126513</a>

Result language

angličtina

Original language name

Using 3D digital image correlation in an identification of defects of trees subjected to bending

Original language description

Abrupt changes of climate have intensified during the last few decades, bringing higher risks from tree failures by either uprooting or stem breakage. To eliminate the risks, many techniques of tree assessment are being used. In the presented work, an optical technique based on 3D Digital Image Correlation (3D-DIC) was investigated as one of the tools to be used in identification of tree defects. Within the work, two ash trees were examined by pulling tests coupling 3D-DIC and standard techniques. The trees were measured in five consecutive steps of artificially made defects of two kinds - root and stem damage. We hypothesized defects can be identified using full-field strains and displacements. Results indicated that 3D-DIC provides comparable strains as standard semi-destructive extensometers. Statistical tests (α = 0.05) showed the 3D-DIC technique method is capable of identifying changes of displacements and strains after creating artificial defects in trees. However, despite the statistical differences, the practical arboricultural considerations of findings are still limited due to low absolute differences. The study also suggests there might exist path-dependency of the defect creation order when evaluating stiffness/strains from extensometers of two different positions. This could have impact on a practical assessment of tree stability in the future, but it must be further tested on larger data sets due to the proof-of-concept character of this work. In general, 3D-DIC brings extensive improvement in data acquisition quality and quantity, especially from the perspective of natural variability and heterogeneity in trees and wood.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40102 - Forestry

Project

<a href="/en/project/TA04020652" target="_blank" >TA04020652: Non-invasive system for the tree stability measurement and safety evaluation</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

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

Name of the periodical

Urban Forestry &amp; Urban Greening

ISSN

1618-8667

e-ISSN

—

Volume of the periodical

46

Issue of the periodical within the volume

December

Country of publishing house

DE - GERMANY

Number of pages

10

Pages from-to

126513

UT code for WoS article

000497127600038

EID of the result in the Scopus database

2-s2.0-85074526424