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Analysis of the Static Behavior of a Single Tree on a Finite Element Model

This work deals with the innovated complex process of tree risk assessment, from precise geometrical tree shape acquisition to building and analyzing a finite element model under specified load. The acquisition of the 3D geometry of the tree was performed by means of terrestrial laser scanning. Obta...

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Autores principales: Moravčík, Ľuboš, Vincúr, Radko, Rózová, Zdenka
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8309158/
https://www.ncbi.nlm.nih.gov/pubmed/34202797
http://dx.doi.org/10.3390/plants10071284
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author Moravčík, Ľuboš
Vincúr, Radko
Rózová, Zdenka
author_facet Moravčík, Ľuboš
Vincúr, Radko
Rózová, Zdenka
author_sort Moravčík, Ľuboš
collection PubMed
description This work deals with the innovated complex process of tree risk assessment, from precise geometrical tree shape acquisition to building and analyzing a finite element model under specified load. The acquisition of the 3D geometry of the tree was performed by means of terrestrial laser scanning. Obtained point cloud was optimized and additionally converted to a 3D CAD model, representing the bearing skeleton compound of trunk and main branches. For structural analysis purposes, a finite element model (FEM) was built in the form of beam structure fixed to the ground. Particular beams were defined by geometry, material properties of wood, and cross sections. An acoustic tomography was applied for determination of the precise cross section on investigated locations of an analysis model. Finite element analysis performed on the computational model shows the bearing capacity and deformations of the whole tree structure caused by combinations of load cases like self-weight and static equivalent of wind load. The results of the structural analysis called attention to potentially dangerous places within the tree structure with extreme node displacements or tensile stresses on beams. Thus, we observed a maximal horizontal displacement of 280.4 mm in node N34 and dangerous tensile stress in node N26, where it reaches +23.6 MPa. After filtering some beams with an abnormal cross section geometry, the finite element analysis of the whole tree structure showed the highest tensile stress of +8.8 MPa and highest compressive stress of −8.9 MPa. The suggested method can be applied generally for the prediction of potentially risky tree suspected of breakage and especially for monumental trees, where the presented method can be mostly applicable.
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spelling pubmed-83091582021-07-25 Analysis of the Static Behavior of a Single Tree on a Finite Element Model Moravčík, Ľuboš Vincúr, Radko Rózová, Zdenka Plants (Basel) Article This work deals with the innovated complex process of tree risk assessment, from precise geometrical tree shape acquisition to building and analyzing a finite element model under specified load. The acquisition of the 3D geometry of the tree was performed by means of terrestrial laser scanning. Obtained point cloud was optimized and additionally converted to a 3D CAD model, representing the bearing skeleton compound of trunk and main branches. For structural analysis purposes, a finite element model (FEM) was built in the form of beam structure fixed to the ground. Particular beams were defined by geometry, material properties of wood, and cross sections. An acoustic tomography was applied for determination of the precise cross section on investigated locations of an analysis model. Finite element analysis performed on the computational model shows the bearing capacity and deformations of the whole tree structure caused by combinations of load cases like self-weight and static equivalent of wind load. The results of the structural analysis called attention to potentially dangerous places within the tree structure with extreme node displacements or tensile stresses on beams. Thus, we observed a maximal horizontal displacement of 280.4 mm in node N34 and dangerous tensile stress in node N26, where it reaches +23.6 MPa. After filtering some beams with an abnormal cross section geometry, the finite element analysis of the whole tree structure showed the highest tensile stress of +8.8 MPa and highest compressive stress of −8.9 MPa. The suggested method can be applied generally for the prediction of potentially risky tree suspected of breakage and especially for monumental trees, where the presented method can be mostly applicable. MDPI 2021-06-24 /pmc/articles/PMC8309158/ /pubmed/34202797 http://dx.doi.org/10.3390/plants10071284 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Moravčík, Ľuboš
Vincúr, Radko
Rózová, Zdenka
Analysis of the Static Behavior of a Single Tree on a Finite Element Model
title Analysis of the Static Behavior of a Single Tree on a Finite Element Model
title_full Analysis of the Static Behavior of a Single Tree on a Finite Element Model
title_fullStr Analysis of the Static Behavior of a Single Tree on a Finite Element Model
title_full_unstemmed Analysis of the Static Behavior of a Single Tree on a Finite Element Model
title_short Analysis of the Static Behavior of a Single Tree on a Finite Element Model
title_sort analysis of the static behavior of a single tree on a finite element model
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8309158/
https://www.ncbi.nlm.nih.gov/pubmed/34202797
http://dx.doi.org/10.3390/plants10071284
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