Some physical and mechanical properties of laminated veneer lumber reinforced with carbon fiber using heat-treated beech veneer

Perçin, Osman; Altunok, Mustafa

doi:10.1007/s00107-016-1125-z

Cited by 18 publications

(12 citation statements)

References 46 publications

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“…The values obtained for volumetric swelling in this study were lower than those found by Percin and Altunok (2017), working with LVL panels produced with Fagus orientalis Lipsky wood reinforced with carbon fibre and obtained mean values of 15.83 and 13.61% for control and reinforced panels, respectively. On the other hand, the results were slightly higher than those for the rubber wood LVL panels tested by Kamala et al (1999), which obtained volumetric swelling levels of 4.16%.…”

Section: Cernecontrasting

confidence: 86%

Studying the Grammage in LVL Panels Glued With Castor Oil-Based Polyurethane Adhesive: A Possible Alternative to Formaldehyde Releasing Adhesives.

Faria

Lopes

Scatolino

et al. 2020

CERNE

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Section: Cernecontrasting

confidence: 86%

Studying the Grammage in LVL Panels Glued With Castor Oil-Based Polyurethane Adhesive: A Possible Alternative to Formaldehyde Releasing Adhesives.

Faria

Lopes

Scatolino

et al. 2020

CERNE

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“…It should be noted that a statistically significant increase in the CS value (Table 4) was recorded for black poplar wood modified at the temperature of 160 The research shows that thermal modification has a positive effect on the compressive strength of wood. Percin et al [47] obtained similar relationships. For beech (Fagus orientalis Lipsky) wood thermally modified under atmospheric pressure in almost all modification variants (for temperatures of 150 • C, 175 • C, 200 • C and time of 1 h, 3 h, 5 h), the authors obtained an increase in the value of compressive strength contained between 2.98% and 19.3%.…”

Section: Modification Time (H)mentioning

confidence: 71%

Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (Populus nigra L.)

Bytner¹,

Drożdżek²,

Laskowska³

et al. 2022

Materials

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The thermal modification of wood in a nitrogen atmosphere shapes the functional properties of wood. The aim of this research was to determine the influence of different levels of temperature and the duration of thermal modification on the mechanical properties of the black poplar (Populus nigra L.). Black poplar was thermally modified in nitrogen atmosphere in the temperature range from 160 °C to 220 °C (6 levels) for 2 h to 8 h (4 levels), resulting in a total of 24 treatments. The effect of these treatments on compressive strength parallel to the grain (CS), modulus of rupture (MOR), and modulus of elasticity during bending (MOE) were analyzed. Thermal modification influenced the mechanical properties of black poplar wood. After thermal modification occurred in a nitrogen atmosphere, an increase in compressive strength was noticeable for all variants of black poplar wood modification. The highest 16% increase in CS was obtained for the modification carried out at the temperature of 160 °C and for 2 h. An increase was also found for MOE when modified under mild conditions, while a decrease occurred for variants at higher temperatures, i.e., for 200 °C and 220 °C. The study showed that for all modification variants, there was a decrease in MOR alongside the increase in modification temperature and time.

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“…An increase in CS value of thermally treated wood was also reported in some previous study results Özçifçi et al 2009;Altınok et al 2010). However, the results of some studies in the literature indicate that CS strength decreases after thermal treatment (especially above 200 °C) (Korkut and Aytin 2015;Perçin and Altınok 2017;Pelit et al 2018). Yıldız et al (2006) demonstrated that the main reason for the decrease in CS strength is the thermal degradation of hemicellulose determined by chemical analysis.…”

Section: Bending Strength Modulus Of Elasticity and Compression Strengthmentioning

confidence: 99%

Influence of densification on mechanical properties of thermally pretreated spruce and poplar wood

Pelit

Yorulmaz²

2019

BioRes

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The effects of mechanical densification on density, Brinell hardness, bending strength (MOR), modulus of elasticity (MOE), and compression strength (CS) of thermally pretreated spruce (Picea orientalis) and poplar (Populus nigra) wood samples were investigated. Thermal treatment was applied on the wood samples at four different temperatures (140 °C, 160 °C, 180 °C, and 200 °C) and two different durations (7 h and 9 h) under atmospheric pressure. Wood samples were then densified by compression at a temperature of 150 °C to two degrees (20% and 40%) of compression. The results indicated that the density, hardness, and MOR values of both compressed and non-compressed thermally pretreated spruce and poplar samples decreased with increasing treatment temperature and duration. At temperatures below 200 °C, the MOE was generally increased in thermally pretreated samples. However, the MOE was reduced in thermally pretreated samples at 200 °C compared to the untreated samples. Additionally, all thermal pretreatments increased CS values in compressed and non-compressed wood samples. The CS tended to decrease in thermally pretreated samples (especially 40% compressed) at 200 ºC. After the densification, all of the strength properties tested in thermally pretreated samples increased significantly depending on the increase in compression ratio.

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Some physical and mechanical properties of laminated veneer lumber reinforced with carbon fiber using heat-treated beech veneer

Cited by 18 publications

References 46 publications

Studying the Grammage in LVL Panels Glued With Castor Oil-Based Polyurethane Adhesive: A Possible Alternative to Formaldehyde Releasing Adhesives.

Studying the Grammage in LVL Panels Glued With Castor Oil-Based Polyurethane Adhesive: A Possible Alternative to Formaldehyde Releasing Adhesives.

Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (Populus nigra L.)

Influence of densification on mechanical properties of thermally pretreated spruce and poplar wood

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