Orthotropic properties of loblolly pine (Pinus taeda) strands

Jeong, Gi Young; Hindman, Daniel P.; Zink-Sharp, Audrey

doi:10.1007/s10853-010-4658-2

Cited by 35 publications

(20 citation statements)

References 19 publications

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“…Similar high CoV values for tensile Poisson's ratios published by [26,34] point to a natural high variability of the Poisson's ratios. The settlement of the Poisson's ratio values measured at standard climatic conditions with the average values for hardwoods listed in [12], show a reasonable similarity (see Table 2).…”

Section: Poisson's Ratiossupporting

confidence: 76%

Moisture-dependent elastic and strength anisotropy of European beech wood in tension

2012

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While the general mechanical behaviour of wood is known, its moisture-dependent elastic and strength anisotropy remains little studied. Given the anisotropic and hygroscopic nature of wood, a characterisation of wood mechanical behaviour will require knowledge of its moisture-dependent properties in relation to the three principal axes of anisotropy. The present study examines the influence of the moisture content (MC) on the elastic and strength anisotropy of beech wood (Fagus sylvatica L.). Selected elastic and strength parameters, including the anisotropic Young's moduli, Poisson's ratios, yield and ultimate stress values and the fracture toughness in the TR, TL, RT and RL directions, are determined in uniaxial tension and compact tension tests at different moisture conditions. A distinct moisture dependency is shown for the elastic and strength behaviour of beech wood. With the exception of some Poisson's ratios, all investigated elastic and strength parameters are shown to decrease with increasing MC. The two-and three-dimensional representation of the compliance matrix, and the two-dimensional visualisation of a yield surface, provides a valuable overview on the moisture-dependent elastic and strength anisotropy of beech wood.

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Section: Poisson's Ratiossupporting

confidence: 76%

Moisture-dependent elastic and strength anisotropy of European beech wood in tension

2012

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“…The elastic constants for Pine in [21] were calculated using the orthotropic material model, assuming the symmetry of the compliance matrix. Orthotropic of the Pine is confirmed by experiments discussed in [13,14]. However, in the case of pine analyzed in [4], in which ultrasonic measurements of wood were carried out, the compliance matrix is non-symmetric (Table 3).…”

Section: Orthotropic Constants For Woodmentioning

confidence: 72%

“…Wood and wooden products are very popular materials used in construction engineering for buildings, bridges, towers and other structures. Wood is a complex, inhomogeneous and anisotropic material, but in engineering practice wood is often idealized as a homogeneous, orthotropic material [2,13,14,26,40,44,45]. Based on the orthotropic model, three principal orthogonal directions of elasticity for wood, i.e., longitudinal (L), tangential (T) and radial (R) are determined.…”

Section: Introductionmentioning

confidence: 99%

Verification of Orthotropic Model of Wood

Obara

2018

Archives of Civil Engineering

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The paper is dedicated to the discussion of elastic coefficients of wood. Parameters for wood presented in the literature are critically evaluated and discussed. The orthotropic mathematical model, with nine different elastic parameters, is one of the most often used models of wood. However, mathematical limitations on these parameters for the correct model are not well known. Based on these limitations, the verification of orthotropic elastic parameters for different species of wood is presented. The analysis shows that the published data are often unclear and sometimes wrong. The attempt to relate experimental results to the mean values specified in the standards is the second aspect considered in this paper. The designer, a user of these standards, should have clear information that the given parameters are specified for specific mathematical model and species of wood. This paper attempts to propose such a classification.

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“…In other words, the mechanical behavior of the connections was solely dependent upon the properties of materials. Previous studies showed that material properties and failure behaviors associated with structure of the materials were critical to predict strengths of the materials (Jeong and Hindman [1] and Jeong et al, [2]).…”

Section: Introductionmentioning

confidence: 99%

Predicting Moment Carrying Capacity of the "sagae" Connection Using the Finite Element Method

Park¹,

Park²,

Hwang³

et al. 2013

Journal of the Korean Wood Science and Technology

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The goal of this study is to analyze the effects of geometries of mortise and tenon on moment carrying capacity of the "sagae" connection. Effects of different tenon widths, mortise depths of connection from the top and bottom beams on stress distribution were investigated using the finite element method (FEM). Critical normal and shear stresses occurred at the reentrant corner from the mortise of the bottom beam. The maximum moment carrying capacity of the sagae connection from the FEM was validated from the results of experimental test. Maximizing moment carrying capacity of the sagae connection was found when the tenon width and mortise depth from the two beams were 40 mm and 60 mm, respectively.

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Orthotropic properties of loblolly pine (Pinus taeda) strands

Cited by 35 publications

References 19 publications

Moisture-dependent elastic and strength anisotropy of European beech wood in tension

Moisture-dependent elastic and strength anisotropy of European beech wood in tension

Verification of Orthotropic Model of Wood

Predicting Moment Carrying Capacity of the "sagae" Connection Using the Finite Element Method

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