Influence of wood moisture content on the modulus of elasticity in compression parallel to the grain

Silva, Diogo Aparecido Lopes; Lahr, Francisco Antônio Rocco; Faria, Obede Borges; Chahud, Eduardo

doi:10.1590/s1516-14392012005000025

Cited by 24 publications

(17 citation statements)

References 5 publications

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“…It is known that moisture content (MC) affects the physical and mechanical properties of wood (Silva et al 2012), but the effect of MC on the mechanical properties of wood can be downplayed when the change of MC is small. Assuming that each layer of resinated veneer has the same compression ratio (CR) as LVL, the tensile MOE of LVL is approximately equal to that of each layer of resinated veneer.…”

Section: Effect Of Compression and Resinmentioning

confidence: 99%

Mechanical Properties of Poplar Laminated Veneer Lumber Modified by Carbon Fiber Reinforced Polymer

Wei¹,

Wang²,

Zhou³

et al. 2013

BioResources

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a Poplar (Populus euramericana cv.) is one of the most important fastgrowing tree species in China, but so far its utilization has been limited to nonstructural wood-based panels. The objective of this work was to develop a good understanding of how to improve the mechanical properties of poplar laminated veneer lumber (LVL) with carbon fiber reinforced polymer (CFRP). A theoretical model was successfully developed to predict the bending modulus of elasticity (MOE) of LVL reinforced by CFRP. To validate the model, two different configurations of LVL were made in the laboratory: LVL reinforced with a single layer of CFRP on one side (LVL-SR) and LVL reinforced with a single layer of CFRP on each side (LVL-DR). It was found that the model prediction of the LVL MOE agreed well with the experimental results. LVL reinforced with CFRP had a greater MOE and modulus of rupture (MOR) than the control LVL. The MOE of the LVL-SR and LVL-DR increased by 40% and 67%, respectively.

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Section: Effect Of Compression and Resinmentioning

confidence: 99%

Mechanical Properties of Poplar Laminated Veneer Lumber Modified by Carbon Fiber Reinforced Polymer

Wei¹,

Wang²,

Zhou³

et al. 2013

BioResources

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“…Another property investigated in this study was the influence of moisture, which has a major impact on wood, such as, variation on the elastic modulus as described in Silva et al 21 and Gerhard 22 . Therefore measuring how much water the material can absorb is an important way to determine the behavior of the wood when exposed to high humidity environments.…”

Section: Wood Coating Ef(mpa) Sr (Mpa)mentioning

confidence: 99%

Laminated composite based on polyester geotextile fibers and polyurethane resin for coating wood structures

et al. 2013

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New environmental laws have restricted the use of hardwood trees in overhead power lines structures, such as, poles and cross-arms, leading companies to seek alternative materials. Reforested wood coated with polymeric resin has been proposed as an environmental friendly solution, with improved electrical properties and protection against external agents, e.g. moisture, ultra violet radiation and fungi. However, the single thin layer of resin, normally applied on such structures reveal to be inefficient, due to be easily damage during handling. In this paper, we present a composite coating, based on geotextile fibers and polyurethane resin that is suitable for wooden structures. Results obtained from two different tree species (from managed and reforested areas) coated with the composite reveal that the additional layer not only provided a stronger adhesion between wood and ccoating layer but also a further improvement in the electrical properties and better protection against abrasion and moisture.

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“…The specimen dimensions for compression parallel to the grain testing [16][17][18][19][20][21][22] were: 35 mm thick × 100 mm wide × 150 mm high. Figure 5 shows the compression parallel to the grain specimen.…”

Section: Compression Parallel To the Grainmentioning

confidence: 99%

Physical and Mechanical Properties of Paricá Wood Species Treated with CCB Preservative

H.¹,

S.²,

D.³

et al. 2013

cmaterials

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Wood of Paricá species (Schizolobium amazonicum) is highly susceptible to degradation by decay microorganis ms. Due to its increasing production in the northern region of Brazil, about 85 thousand hectares, and later use both for structural purposes and for the furniture industry, the need of extending life of Paricá wood applying chemical preservatives arises. One current alternative is the treatment by autoclave using CCB (Copper Chro me Boron). The aim of this study was to evaluate the influence of treatment with CCB in the properties: apparent density, parallel and perpendicular hardness to the grain, strength to shear and in the co mpression parallel to the grain of the Schizolobium amazonicum wood species, comparing the results with untreated wood. We observed that treatment with CCB did not change the properties of apparent density, shear strength, perpendicular hardness, strength and stiffness in co mpression parallel to the grain. For the hardness strength parallel to the grain was decreased in 28.9%.

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Influence of wood moisture content on the modulus of elasticity in compression parallel to the grain

Cited by 24 publications

References 5 publications

Mechanical Properties of Poplar Laminated Veneer Lumber Modified by Carbon Fiber Reinforced Polymer

Mechanical Properties of Poplar Laminated Veneer Lumber Modified by Carbon Fiber Reinforced Polymer

Laminated composite based on polyester geotextile fibers and polyurethane resin for coating wood structures

Physical and Mechanical Properties of Paricá Wood Species Treated with CCB Preservative

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