Modeling of the Stress-Strain Relationship of Wood Material Beyond Its Elasticity Limit under Cyclic Compressive Loading: Comparative Study of Two Models

Fothe, Thierry; Azeufack, Ulrich Gael; Kenmeugné, Bienvenu; Talla, Pierre Kisito; Fogue, Médard

doi:10.18280/mmep.080108

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…Wood exhibits complex viscous, elastic and plastic anisotropic behaviour. The complex nonlinear behavior of wood and the variability of its properties, which are explained by the conditions of origin and functioning of this natural composite [2,6,7,8,9], predetermine the need to continue research in the designated area.…”

Section: Introductionmentioning

confidence: 99%

Monotonic and cyclic load of pine wood under uniaxial compression: experiments and modeling

Kolesnikov,

Nazarev

2023

E3S Web of Conf.

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To analyze the behavior of wood under uniaxial monotonic deformation, we applied an analytical model to separately control of the pre-peak and post-peak branches of the load-displacement curve. Two criteria for the transition of wood into the plastic stage of deformation are considered. To analyze the behavior of wood under cyclic uniaxial deformation, we used the load-displacement curve obtained for monotonic deformation as an envelope. Equations for the plotted of load-displacement curves under cyclic loading with incomplete unloading are proposed. As an experimental and model illustration, the behavior of a pine specimen under cyclic uniaxial compression with incomplete unloading in the range from 8 to 15 kN is considered. Because the highest cyclic load exceeds the load at the point of transition of wood into the plastic stage, the deformation process has already after 54 cycles moved to the downward branch of the load-displacement curve for monotonic deformation. The simulation results are in agreement with experimental and literature data, which suggests the suitability of this method for the study of some wood-based composites.

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Section: Introductionmentioning

confidence: 99%

Monotonic and cyclic load of pine wood under uniaxial compression: experiments and modeling

Kolesnikov,

Nazarev

2023

E3S Web of Conf.

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Methods for determining the critical deformations of wood with various moisture content

Homon¹,

Litnitsky²,

Gomon³

et al. 2023

Scientific Horizons

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During construction of bridges, the possibility of flooding periods should be considered. Therefore, it is necessary to understand the degree of possible deformation of wooden structures and calculate the limit of their plasticity and elasticity at different values of moisture content. Thus, the purpose of study is to find the method for determining the relative critical deformations of wood with different moisture content and analyse the dynamics of their change. Problems of a deformable solid material were investigated by the analysis of a model of complete deformation diagram “stress σс – deformation uс ”, methods of mathematical statistics, and systematic analysis of experimental results. This study allowed formulating the method for determining the relative critical deformations of solid wood at different moisture levels by axial compression along the fibres of experimental samples. Based on the experiment results, the formula for determining the relative critical deformations of solid wood with different moisture was proposed. The dynamics of changes in critical relative deformations at different moisture, and its elastic and plastic components were presented. It was found that in case of drying wood from 30 to 12%, the plastic component of relative critical deformations decreases and the elastic one, on the contrary, increases. The findings can be used in the deformation calculation methodology for wooden elements and structures of bridges, hydraulic structures, buildings, taking into account the changes in the moisture content of the material

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Modeling of the Stress-Strain Relationship of Wood Material Beyond Its Elasticity Limit under Cyclic Compressive Loading: Comparative Study of Two Models

Cited by 2 publications

References 22 publications

Monotonic and cyclic load of pine wood under uniaxial compression: experiments and modeling

Monotonic and cyclic load of pine wood under uniaxial compression: experiments and modeling

Methods for determining the critical deformations of wood with various moisture content

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