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Can mechanical strain and aspect ratio be used to determine codominant unions in red maple without included bark [Elektronski vir]Dahle, Gregory ...Arborists maintain trees in landscapes where failure can cause damage to infrastructure. Codominant branch unions are considered less stable than lateral branch unions. Previous research has found ... that unions can be considered codominant when aspect ratio is greater than 0.70 when included bark is present, yet it remains unclear if this threshold is reasonable in the absences of included bark. We utilized digital image correlation to measure strain (deformation) and separation angle to failure to better understand how mechanical loads move through Acer rubrum L. (red maple) branch unions. Strain was found to be higher in the branch regions in limb failure and ball and socket failure modes and strain was greater in the branch protection zone regions of imbedded and flat failures. Strain at failure was found to decrease with increasing aspect ratio, plateauing beyond aspect ratios of 0.83. In the absence of included bark, red maple branch unions appear to become codominant at aspect ratio of 0.83. We recommend that arborists should proactively manage to keep aspect ratios lower than 0.60 and consider mitigation options as aspect ratios approach 0.70Source: Forests [Elektronski vir]. - ISSN 1999-4907 (Vol. 13, iss. 7, art. 1007, 2022, str. 1-13)Type of material - e-article ; adult, seriousPublish date - 2022Language - englishCOBISS.SI-ID - 115440643
Author
Dahle, Gregory |
Eckenrode, Robert T. IV |
Smiley, E. Thomas |
DeVallance, David Brian |
Holásková, Ida
Topics
aspect ratio |
arboriculture |
biomechanics |
digital image correlation |
red maple |
strain |
strain |
razmerje |
drevesničarstvo |
biomehanika |
korelacija digitalne slike |
rdeči javor |
obremenitev |
obremenitev
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Dahle, Gregory | ![]() |
Eckenrode, Robert T. IV | ![]() |
Smiley, E. Thomas | ![]() |
DeVallance, David Brian | 51449 |
Holásková, Ida | ![]() |
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