Open AccessInspection and Evaluation of Decay Damage in Japanese Cedar Trees Through Nondestructive Techniques
Author(s) -
Lin ChengJung,
ChiaJu Lee,
Tsai MingJer
Publication year - 2016
Publication title -
arboriculture and urban forestry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.222
H-Index - 47
eISSN - 2155-0778
pISSN - 1935-5297
DOI - 10.48044/jauf.2016.018
Subject(s) - cryptomeria , nondestructive testing , stress wave , tree (set theory) , displacement (psychology) , japonica , mathematics , materials science , physics , composite material , botany , biology , mathematical analysis , psychology , quantum mechanics , psychotherapist
The purpose of this study was to investigate the standard values of living, undamaged Japanese cedar (Cryptomeria japonica) trees through different nondestructive techniques. This study also detects the stress wave velocity (V) and tomogram (VT), and resolves corresponding V maps of Japanese cedar trees with and without decay damage for tree risk assessment. A visual tree inspection form, with seven categories of tree damage, is proposed for tree hazard assessment. Different nondestructive evaluation parameters can serve as an index for diagnosing standard values (with or without decay). The VT and corresponding stress wave velocity maps of decay-damaged and damaged Japanese cedar trees can detect the general location and area of wood deterioration. The transversal acoustic velocity values increased with increasing diameter in undamaged trees, and the difference between the maximum and minimum V value of the trunks in undamaged trees fell within a range of constants. The proposed approach can be combined with other non-destructive techniques to better examine and confirm the situation of trees.