Elastic constants of wood determined by ultrasound using three geometries of specimens

Gonçalves, Raquel; Trinca, Alex Julio; Pellis, Bruno Piva

doi:10.1007/s00226-013-0598-8

Cited by 56 publications

(56 citation statements)

References 8 publications

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“…Ultrasonic wave methods are largely employed for this kind of investigation, because they are cheap, easy to generate and to detect. They usually allow the determination of the diagonal terms of the elastic tensor on a unique parallelepipedic sample (Keunecke et al 2007) but, except in some cases with a polyhedral (François et al 1998;Gonçalves et al 2014;Vázquez et al 2015) or spherical sample (Bucur and Rasolofosaon 1998;El Mouridi et al 2011), the method usually requires several samples, and/or coupling with other kinds of measurement, for the determination of off-diagonal terms (i.e., Poisson's ratios) (Bucur 2006;Dahmen et al 2010;Gonçalves et al 2011;Kohlhauser and Hellmich 2012). These methods require samples much larger than the wavelength, and this is not always possible to achieve for heterogeneous materials by scaling down the wavelength.…”

Section: Introductionmentioning

confidence: 99%

Elastic characterization of wood by Resonant Ultrasound Spectroscopy (RUS): a comprehensive study

et al. 2017

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The main principle of Resonant Ultrasound Spectroscopy (RUS) measurement method is to excite a sample and to deduce its elastic constants from its free mechanical resonant frequencies. The goal of this paper is to propose an applica-tion of RUS in the case of wood cubic samples by: (1) using frequencies and mode shapes (or vibration patterns) of the free resonant modes in an iterative numerical procedure to solve the inverse problem for identifying components of the stiffness tensor of the sample's material, (2) finding the limits and optimizing the robustness of the identification procedure in the case of wood and (3) applying it to a large density range of wood samples. Specific continuous waves have been used as excita-tion signal in order to experimentally determine the free resonant frequencies and mode shapes of the sample in a faster way by means of Scanning Doppler Vibrom-eter measurements. Afterward, the stiffness tensor was derived by solving iteratively an inverse problem. The gain of using the mode shapes in the inverse identification procedure is demonstrated to be particularly necessary for wood, especially for pair-ing each measured frequency with its corresponding theoretically predicted one, as viscoelastic damping causes the resonant peaks to overlap and/or disappear. A sen-sitivity analysis of each elastic constant on the measured resonant frequencies has thus been performed. It shows that, in its current state of development, not all of the

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Section: Introductionmentioning

confidence: 99%

Elastic characterization of wood by Resonant Ultrasound Spectroscopy (RUS): a comprehensive study

et al. 2017

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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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“…Dundar et al (2016) investigated the usability of ultrasonic wave velocity on the determination of dimensional stability of some hardwoods. Ultrasonic method was used to determine different aspects such as mass density by Metwally et al (2016), effects of MC by Karlinasari et al (2016), Yang et al (2015), Dundar et al (2016), Van Dyk and Rice (2005), specific gravity by Calegari et al (2011), hole size and amounts by Wang and Wang (2011), some mechanic properties by Dzbenski and Wiktorski (2007), Gonçalves et al (2014), Vázquez et al (2015), Gonçalves et al (2011), Vázquez et al (2013, Guntekin et al (2016a; and, etc. Effects of decays on ultrasonic measurements studied by Reinprecht andHibky (2011), Schubert et al (2005; and Titta (2006).…”

Section: Introductionmentioning

confidence: 99%

Comparison of temperature dependent Young’s modulus of oriental beech (Fagus orientalis L.) that determined by ultrasonic wave propagation and compression test

Aydın

2018

Turkish Journal of Forestry | Türkiye Ormancılık Dergisi

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Elastic constants of wood determined by ultrasound using three geometries of specimens

Cited by 56 publications

References 8 publications

Elastic characterization of wood by Resonant Ultrasound Spectroscopy (RUS): a comprehensive study

Elastic characterization of wood by Resonant Ultrasound Spectroscopy (RUS): a comprehensive study

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

Comparison of temperature dependent Young’s modulus of oriental beech (Fagus orientalis L.) that determined by ultrasonic wave propagation and compression test

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