The effect of moisture content over the fibre saturation points on the impact strength of wood

The article's main aim is to assess the mechanical behaviour of linden under high-rate loadings (impact) and its change due to changes in moisture content (MC) over fibre saturation point. For assessing the mechanical properties of green wood, mainly the data of the dried wood is not applicable...

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Bibliographic Details
Published in:Royal Society open science 2024-02, Vol.11 (2), p.231685-9
Main Authors: Hassan Vand, Mojtaba, Tippner, Jan
Format: Article
Language:English
Subjects:
Bend strength
Crack initiation
Deformation
Energy
Engineering
fibre saturation point
Impact strength
impact test
Impact tests
linden
Mechanical properties
Moisture content
Moisture effects
Shear strain
three-point bending test
Trees
Water content
wood
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Summary:The article's main aim is to assess the mechanical behaviour of linden under high-rate loadings (impact) and its change due to changes in moisture content (MC) over fibre saturation point. For assessing the mechanical properties of green wood, mainly the data of the dried wood is not applicable since the moisture content can drastically affect the mechanical properties of the wood. By testing both dried and high-moisture-content wood, we can understand a general viewpoint toward the effect of the moisture content on the impact behaviour of the wood. Several test samples were made of linden wood with different moisture content levels of 11%, 60% and 160%. A drop-weight impact machine tested the specimens to measure the reaction force of the hammer during a very short impact period. The results of the tests were parameters such as force-time chart, the maximum force required for crack initiation, the impact bending strength (IBS) and the work needed for crack initiation. The results indicated an increase in MC decreases the maximum force, work required for crack initiation and IBS drastically. However, when MC exceeded the fibre saturation point (FSP), there was no further influence on the force pattern and maximum required force.
ISSN:2054-5703
2054-5703
DOI:10.1098/rsos.231685