Modeling the tensile mechanical properties of silver birch timber boards

Collins, Steven G.; Fink, Gerhard

doi:10.1016/j.conbuildmat.2022.128147

Cited by 8 publications

(4 citation statements)

References 20 publications

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“…It agrees with the findings from other re searchers. It was reported that failures also occur at smaller knots and, in this case, th strength of the knots may be higher than the strength of the timber board [24]. In practice, there are live knots, dead knots, intergrown knots, and knot holes in wood.…”

Section: Resultsmentioning

confidence: 99%

Understanding the Effect of Knots on Mechanical Properties of Chinese Fir under Bending Test by Using X-ray Computed Tomography and Digital Image Correlation

Zhang,

Sun,

et al. 2024

Forests

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Knots in wood have a substantial impact on both the physical and mechanical properties of derived products. It is necessary to study their effect on the mechanical properties of wood and understand the mechanisms behind the effect. The modulus of elasticity (MOE) and modulus of rupture (MOR) of specimens without knots and with knots are measured using the three-point bending test. The size and position of knots are recorded. The specimens with knots are analyzed according to failure not at knots and failure at knots. For specimens with failure at knots, they are further divided into two sub-groups, i.e., failure around knots (FK-A) or failure in knots (FK-I).

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Section: Resultsmentioning

confidence: 99%

Understanding the Effect of Knots on Mechanical Properties of Chinese Fir under Bending Test by Using X-ray Computed Tomography and Digital Image Correlation

Zhang,

Sun,

et al. 2024

Forests

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“…In previous experimental investigations on birch timber boards [3,4], tension tests were conducted, and the tension failures often involved clear wood with grain deviations. However, methods for modelling the birch species (a diffuse porous hardwood), which consider grain orientation are lacking.…”

Section: Introduction 456mentioning

confidence: 99%

Modelling the Effect of Three-Dimensional Grain Angle on the Tension Strength of Birch Wood

Collins

Jaaranen

Fink

2023

World Conference on Timber Engineering (WCTE 2023)

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In the present paper, the effect of three-dimensional grain direction on the tension strength of small-scale birch wood specimens is investigated. The grain angles are measured on all four surfaces of the specimens using laser light scattering technique, and afterwards, the specimens are destructively tested in tension. A numerical model is developed to predict the tensile strengths. The model is a combination of a linear elastic finite element model, with local orthotropic material orientations defined based on the measured grain orientations, and stress-based phenomenological failure criteria, with stress averaging. Strength predictions from the numerical model are compared to the experimental results, and, additionally, material strength properties are calibrated by minimizing the difference between the predictions and experimental results. A simple analytic model is further investigated and evaluated against the numerical model. Results indicate that the numerical model can predict the tensile strength of the specimens based on the measured grain angles. Stress averaging improved strength predictions by reducing localized stress peaks. Calibrated strength properties further improved the predictions and are compared with the literature. With only grain angle information, however, the numerical model does not significantly improve predictions, relative to the simple analytical model.

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“…This species is found in the Northern Hemisphere, particularly in northern temperate climate areas such as China. Betula spp., also known as birch, has not only exceptional physical and mechanical properties (Luostarinen and Verkasalo 2000;Collins and Fink 2022), but it is also abundant on the Eurasian continent (Dobrowolska et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Effect of tree age on the properties of Himalayan birch (Betula alnoides Buch.-H.ex D.Don) wood

Uyup,

Zhang,

Feng

et al. 2023

BioRes

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The purpose of this study was to determine the effect of four different age groups on wood properties, i.e., anatomical, physical, and mechanical, of Himalayan birch (Betula alnoides Buch.-H.ex D.Don). The correlation between the properties was also discussed. The results indicated age influences the anatomical, physical, and mechanical properties of Himalayan birch. Results were comparable with other plantation species. Moreover, mechanical properties were highly correlated with the fibre morphology in Himalayan birch. Results from this present study indicate that the 15-, 20-, and 25-year-old Himalayan birch are suitable to be used for parquet, furniture, and other products. Generally, plantation-grown Himalayan birch has the potential to be a raw material to fulfill the demand for the timber industry.

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Modeling the tensile mechanical properties of silver birch timber boards

Cited by 8 publications

References 20 publications

Understanding the Effect of Knots on Mechanical Properties of Chinese Fir under Bending Test by Using X-ray Computed Tomography and Digital Image Correlation

Understanding the Effect of Knots on Mechanical Properties of Chinese Fir under Bending Test by Using X-ray Computed Tomography and Digital Image Correlation

Modelling the Effect of Three-Dimensional Grain Angle on the Tension Strength of Birch Wood

Effect of tree age on the properties of Himalayan birch (Betula alnoides Buch.-H.ex D.Don) wood

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