Mechanical properties of laminated veneer lumber produced from ten cultivars of poplar

Haouzali, Hafida El; Marchal, Roland; Bléron, Laurent; Kifani‐Sahban, Fatima; Butaud, Jean-Claude

doi:10.1007/s00107-020-01546-5

Cited by 8 publications

(5 citation statements)

References 27 publications

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“…4 Uni-Wood Corporation Co., Ltd., Osaka 559-0034, Japan. 5 Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan.…”

Section: Fundingmentioning

confidence: 99%

“…Over the past few decades, the forest area in China has increased remarkably, and fast forestry has made a significant contribution to the expansion of plantation forests [2]. Poplar and eucalyptus are attracting the attention as material of plywood and laminated veneer lumber (LVL) in the world [3][4][5]. Poplar in East China and eucalyptus in South China play an important role in developing the wood-based product industry of plywood, fiberboard, and paper [6].…”

Section: Introductionmentioning

confidence: 99%

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Utilization of Chinese fast-growing trees and the effect of alternating lamination using mixed-species eucalyptus and poplar veneers

et al. 2021

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Over the past few decades, the sustainable forest area in China has increased remarkably, with 2400 million cubic meters of eucalyptus produced in 2018 in Guangxi which is the largest plantation area in China. In this study, the effect of alternating lamination using soft poplar veneers and hard eucalyptus veneers, on the mechanical properties of laminated veneer lumber (LVL), was examined. Eucalyptus and poplar veneers were imported from China to Japan to manufacture the LVL. For both eucalyptus and poplar veneers, the pith side (innerwood) sheets were lighter in density than the bark side (outerwood) sheets. The specific Young’s modulus of alternating LVL with hard eucalyptus veneers and soft poplar veneers was smaller than that of the mono-species LVL of eucalyptus and poplar. Strain distributions were obtained with the compression test by using the digital image correlation method. Normal strains showed that the hard eucalyptus layer behaved as a thin plate, whereas the soft poplar layer mitigated the movement of the hard eucalyptus layer. Alternating lamination decreased the variation in the elastic modulus of LVL made from fast-growing species. Therefore, the soft layers mitigated the movement of the hard layers, which had large variations in mechanical properties.

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“…4 Uni-Wood Corporation Co., Ltd., Osaka 559-0034, Japan. 5 Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto 611-0011, Japan.…”

Section: Fundingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Utilization of Chinese fast-growing trees and the effect of alternating lamination using mixed-species eucalyptus and poplar veneers

et al. 2021

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“…It might be because the static bending strength of poplar veneer was lower than that of bamboo mat [30,31].…”

Section: Moeeff and Moreffmentioning

confidence: 96%

“…It should be noted that the MOEeff of specimen ID layup in minor direction was in line with the requirement of national standard in the major direction, and that in major direction was in accordance with the national requirement in minor direction. This could be caused by the two-ply poplar veneers on the surface, whose textures were perpendicular to the major direction [26,32,33].…”

Section: Moeeff and Moreffmentioning

confidence: 99%

Effect of layups on the mechanical properties of overlaid laminated bamboo lumber made of radial bamboo slices

Guan

Yin²,

Lin

et al. 2022

J Wood Sci

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Radial bamboo strips are being widely used for structural applications due to the higher yield and high strength. However, there was a sharp taper at the top of bamboo which made nodal diaphragm removed incompletely during the process of stripping. The residual bump could bring about poor bonding strength between adjacent radial bamboo strips. In addition, the traditional radial bamboo strips should be weaved before the next step of processing, which caused a lot of material wastes and consumed a lot of labor and time. In order to address these problems, a novel lumber product made of laminated radial bamboo slices was developed by the proper arrangement of core layer and surface layer. The major and minor directions of a panel were defined as the parallel- and perpendicular-to-its arrangement ones in the core layer, respectively. It was found that (1) the layups with double-layer bamboo mats and radial bamboo slices could produce better mechanical properties. The effective modulus of elasticity in major and minor direction was about 7032.5 MPa and 5016.0 MPa, respectively. The effective modulus of rupture in major and minor direction was about 81.0 MPa and 43.6 MPa, respectively; (2) the density distribution tended to be uniform, with a density of about 0.7 g/cm3 that was lower than other similar bamboo-based materials (about 1.0 g/cm3); and (3) the failures occurred in bamboo slices rather than along the bond lines, suggesting good bond quality achieved in this study.

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“…At present, scholars at home and abroad have mainly conducted research on the relevant mechanical properties of tree branches such as jujube, litchi, longan, willow, etc. The results suggest that the physical and mechanical properties of branches are the basis for developing the relevant processing machinery (Monteiro et al 2020) (El Haouzali et al 2020) (Gallego et al 2021). For instance, Wang et al measured the tensile and shear mechanical properties of jujube branches by using the finite element method, predicted the macroscopic mechanical parameters of jujube branches, and evaluated the accuracy of the finite element simulation results through experiments (Wang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Test and analysis of mechanical properties of poplar branches

Zhao,

Zhou,

Jing

et al. 2023

Preprint

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The mechanical properties of poplar branches are the basis for designing and optimizing the working parameters of branch pruning and crushing machinery. In this paper, a precision microcomputer-controlled electronic universal testing machine was used to test the tensile, compression, bending, and shear mechanical properties of poplar branches. The test results suggested that the elastic constitutive relationship of the stress-strain curves of poplar branches under longitudinal compression, transverse compression, and bending conformed to Hooke's law, and longitudinal tensile and shear exhibited plastic damage; the anti-failure strength, anti-failure elastic modulus and external work of poplar branches under longitudinal compression were greater than those under transverse compression. Meanwhile, the analysis results indicated that there was an exponential function positive correlation between longitudinal tensile strength and longitudinal tensile work, a polynomial exponential function positive correlation between longitudinal compressive strength and longitudinal compressive work, a power function positive correlation between transverse compressive proportional ultimate strength and transverse compressive work, and an exponential function positive correlation between bending strength and bending work; meanwhile, there was a polynomial function positive correlation between the peak shear force and the cross-sectional area of the sample, and there was an exponential function positive correlation between the shear work and the cross-sectional area of the sample. Additionally, the external work required to destroy poplar branches can be estimated using the established regression equation. The study results of this paper provide important data support for poplar branch pruning and crushing simulation tests and machine power selection.

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Mechanical properties of laminated veneer lumber produced from ten cultivars of poplar

Cited by 8 publications

References 27 publications

Utilization of Chinese fast-growing trees and the effect of alternating lamination using mixed-species eucalyptus and poplar veneers

Utilization of Chinese fast-growing trees and the effect of alternating lamination using mixed-species eucalyptus and poplar veneers

Effect of layups on the mechanical properties of overlaid laminated bamboo lumber made of radial bamboo slices

Test and analysis of mechanical properties of poplar branches

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