A comparative study of using static and ultrasonic material testing methods to determine the anisotropic material properties of wood

Dackermann, Ulrike; Elsener, Roman; Liu, Haotian; Crews, Keith

doi:10.1016/j.conbuildmat.2015.07.195

Cited by 50 publications

(40 citation statements)

References 16 publications

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“…And, it's occurred due to orthotropic nature of wood which is a natural composite. According to Dackermann et al [34] wave velocities decrease due to barrier function of annual rings. And, form and organizations of the hollow tubular cells of wood cause variation on both mechanical properties and anisotropy [50].…”

Section: Resultsmentioning

confidence: 99%

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Kızılçam (Pinus brutia Ten.) odunu kesme modüllerinin Ultrasonik dalga yayılımı ile tahmini

Aydın

Ciritcioğlu

2018

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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Shear moduli of Calabria pine (Pinus brutia Ten.) predicted using non-destructive test method in this study. Calabria pine logs harvested from Beşkonak, Burdur and sawn in to Radial and Tangential planks. 26 surface polyhedral NDT samples prepared in 65x65x65mm dimensions. All samples acclimatized at 20±1°C temperature and 65% RH conditions. Ultrasonic shear wave velocities of Calabria pine wood calculated using time of flight values. Time of flight values obtained using Olympus EPOCH 650 flaw detector and Panametrics NDT V153 shear wave transducers. Shear moduli predicted using calculated velocities. Average density and moisture content of the non-destructive test samples determined as 0.558g/cm 3 and 12.66%, respectively. Shear wave velocities and shear moduli of LR, LT, and RT planes were determined as 1408, 1306 and 666m/s and 1108, 952 and 248N/mm 2 , respectively.

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Section: Resultsmentioning

confidence: 99%

“…But in general ultrasonic measurements overestimates the results. And, according to Dackerman et al [34] there is around 20% overestimation of shear modulus when ultrasonic measurements performed.…”

mentioning

confidence: 93%

Kızılçam (Pinus brutia Ten.) odunu kesme modüllerinin Ultrasonik dalga yayılımı ile tahmini

Aydın

Ciritcioğlu

2018

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

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“…The necessary parameters to characterize dynamically the test pieces with different compounds of wood are the apparent density (Niklas and Spatz, 2010) and the wave velocity in three directions of anisotropy of wood (Dackermann et al, 2016).By combining wave density and velocity the dynamic module is determined (Gonçalves et al, 2014). Another parameter in the mechanical design is the quality factor, which is similarly usedto classify and to compare the quality of wood (Spycher et al 2008).…”

Section: Ultrasound Characterizationmentioning

confidence: 99%

Laminated Wood and Multimaterial Wood – Adhesive Meshas Replacements of Solid Wood in Restoration of Historical Buildings

Alquicira

Castellanos

Sánchez

2019

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Wooden structure restorationwork in historical buildings requires substitution and/or reparation of structural elements. The aim of this investigation is to compare the density, wave velocity, dynamic module, and quality factor intest pieces of solid wood, laminated wood and a multimaterial of P. pseudostrobus. The work hypothesis proposes that dynamic modules of laminated wood and multimaterial laminated wood reinforced with stainless steel mesh are, at least, equal to solid wood. Small dimension test pieces made of solid wood, laminated wood, and multimaterial wood elaborated with the species P. pseudostrobus were prepared. Humidity content and apparent density of wood were determined. Ultrasound tests in radial, tangential, and longitudinal direction were doneand wave velocity, dynamic module, and quality factor were determined. Empiric evidence indicates that wave velocity, dynamic module, and quality factors are different with the three kinds of test pieces. Laminated wood and multimaterial wood characteristics are similar to P. pseudostrobus solid wood; so that the two compound material have good expectations to substitute some pieces that work as resistance elements in wooden structures.

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“…This study examines orthotropic conditions for different species of wood and verifies the wood constants given in the reference material. When all elastic constants are given [7,10,11,12,15,16,21,22,23,29,31,33,39] it is sufficient see whether condition (2.9) is met ( Table 1, Table 2) because if eigenvalues are positive, the compliance matrix is positive-definite. For incomplete data [4,15,22] the conditions (2.7) are reviewed ( Table 3).…”

Section: Orthotropic Constants For Woodmentioning

confidence: 99%

“…Unfortunately, not all parameters of wood are always stated in the papers. For example, in [4,7,32] there are three elastic moduli and six Poisson's ratios but in [18] -only three elastic moduli and three shear moduli. In none of these cases it is possible to verify the model of wood.…”

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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A comparative study of using static and ultrasonic material testing methods to determine the anisotropic material properties of wood

Cited by 50 publications

References 16 publications

Kızılçam (Pinus brutia Ten.) odunu kesme modüllerinin Ultrasonik dalga yayılımı ile tahmini

Kızılçam (Pinus brutia Ten.) odunu kesme modüllerinin Ultrasonik dalga yayılımı ile tahmini

Laminated Wood and Multimaterial Wood – Adhesive Meshas Replacements of Solid Wood in Restoration of Historical Buildings

Verification of Orthotropic Model of Wood

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