Elasto-plastic material model of green beech wood

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F24%3A43925305" target="_blank" >RIV/62156489:43410/24:43925305 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1186/s10086-024-02140-6" target="_blank" >https://doi.org/10.1186/s10086-024-02140-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1186/s10086-024-02140-6" target="_blank" >10.1186/s10086-024-02140-6</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Elasto-plastic material model of green beech wood

Popis výsledku v původním jazyce

Physically modelling the mechanical response of a tree by numerical simulation depends on having accurate data on the mechanical properties of green hardwood. Lacking such data, we developed and validated an orthotropic elasto-plastic (E-P) material model, based on the results of experiments performed on European beech (Fagus sylvatica L.) green wood, capable of including both the non-linearity and orthotropic properties of the material. We selected 655 clear samples with the special orthotropic structure of annual rings. All samples were prepared immediately after felling; their moisture content (MC) was 80% on average. The mechanical responses in normal directions and shear are represented by bi-linear stress-strain curves. The E-P model was validated by comparing the force-deflection response of three-point bending of green wood samples in a finite-element method (FEM) simulation (the average relative error was 4.6% for point-wise and 1.7% for integral-wise comparison). The output of this work was a consistent set of material constants for the E-P material model that is now available for the structural analysis of beech wood with MC above to fibre saturation point (FSP), especially green wood, subjected to relatively high loads (such that a plastic deformation appears) and that can very well predict a non-linear response above the proportional limits.

Název v anglickém jazyce

Elasto-plastic material model of green beech wood

Popis výsledku anglicky

Physically modelling the mechanical response of a tree by numerical simulation depends on having accurate data on the mechanical properties of green hardwood. Lacking such data, we developed and validated an orthotropic elasto-plastic (E-P) material model, based on the results of experiments performed on European beech (Fagus sylvatica L.) green wood, capable of including both the non-linearity and orthotropic properties of the material. We selected 655 clear samples with the special orthotropic structure of annual rings. All samples were prepared immediately after felling; their moisture content (MC) was 80% on average. The mechanical responses in normal directions and shear are represented by bi-linear stress-strain curves. The E-P model was validated by comparing the force-deflection response of three-point bending of green wood samples in a finite-element method (FEM) simulation (the average relative error was 4.6% for point-wise and 1.7% for integral-wise comparison). The output of this work was a consistent set of material constants for the E-P material model that is now available for the structural analysis of beech wood with MC above to fibre saturation point (FSP), especially green wood, subjected to relatively high loads (such that a plastic deformation appears) and that can very well predict a non-linear response above the proportional limits.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20502 - Paper and wood

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Wood Science

ISSN

1435-0211

e-ISSN

1611-4663

Svazek periodika

70

Číslo periodika v rámci svazku

7 June

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

14

Strana od-do

29

Kód UT WoS článku

001243381700001

EID výsledku v databázi Scopus

2-s2.0-85195593656