Modulus of elasticity prediction through transversal vibration in cantilever beams and ultrasound technique of different wood species

Rello, Luis Acuña; Martínez, Roberto D.; Spavento, Eleana María; Casado, M.; Álvarez-Martínez, Javier; O’Ceallaigh, C.; Harte, Annette M.; Balmori, José-Antonio

doi:10.1016/j.conbuildmat.2023.130750

Cited by 7 publications

(4 citation statements)

References 48 publications

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“…In Table 4 , the material constants for the two pieces of wood ( F. sylvatica L.) are given presented. 29 …”

Section: Characterizationmentioning

confidence: 99%

Synthesis and Mechanical Performances of Polyurethane Bio-Based Adhesives Resulted from the Depolymerization of Lignocellulose Biomass

Rusen,

Toader,

Diacon

et al. 2023

ACS Omega

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The purpose of this study is to valorize biomass waste into products with added value for indoor applications. Thus, broadleaf sawdust was chemically processed by the solvolysis reaction in acid catalysis in the presence of diethylene glycol at 160 °C for 4 h. After filtration and removal of the unreacted biomass, the glycolysis product was used in 6 different polyurethane adhesive formulations for wood bonding. The adhesive films were characterized by FT-IR, TGA, and DMA, while the mechanical performances were investigated by tensile and three-point bending tests. An innovative method for the determination of the working time was proposed. After the displacement of the wood substrates by the tensile test, the bonded area was investigated by SEM analysis. To confirm a correlation between the mechanical performances of the adhesives and their structure/formulation, two-dimensional (2D) simulations were performed based on the tensile tests.

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“…In Table 4 , the material constants for the two pieces of wood ( F. sylvatica L.) are given presented. 29 …”

Section: Characterizationmentioning

confidence: 99%

Synthesis and Mechanical Performances of Polyurethane Bio-Based Adhesives Resulted from the Depolymerization of Lignocellulose Biomass

Rusen,

Toader,

Diacon

et al. 2023

ACS Omega

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“…Hunt's research showed that the dynamic modulus of the cantilever beam and the static elastic modulus have a good linear correlation, but the dynamic elastic modulus is always higher than the static elastic modulus measured by the threepoint bending method. Luis Acuna [13] employed the transverse and longitudinal frequencies of the cantilever beam vibration to predict the modulus of elasticity (MOE) of five different spectral density woods. The dynamic MOE of vibration has a prediction accuracy of 94.9% accuracy, slightly higher than the ultrasonic prediction model's 93.7%.…”

Section: Introductionmentioning

confidence: 99%

The Vibration Dynamic Model for Blister Detection in Medium-Density Fiberboard

Xu,

Wang,

Qiu

et al. 2024

Forests

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Ultrasonic detection is currently used in the industry of medium-density fiberboard to detect blister defects. Due to the small detection area of a single sensor, multiple sensors need to be used, which results in high costs. Starting from elastic thin plate vibration theory, this paper builds a vibration dynamic model to detect blisters. The size and depth of the blister area can be established by determining the natural frequency of the thin plate vibration in the blister area. In this model, if the elastic modulus and density are known, the natural frequency of the thin plate vibration at the blister place is directly proportional to the blister depth and inversely proportional to the square of the blister radius. The size and depth of the blister can be determined by measuring the first third-order natural frequency of this area of research. A total of 25 specimens with blister sizes and depths were simulated, and the natural frequencies of the specimens were measured. Subsequently, the detection model was verified by comparing its experimental data with theoretical values. The theoretical value was highly consistent with the measured data. The measured values of the first, second, and third-order natural frequencies were slightly smaller than the theoretical calculated values, with average relative deviations of −1.6%, −1.34%, and −1.03%, respectively. As the order progressed, the deviation exhibited a downward trend, and the third-order natural frequency displayed the smallest deviation and highest accuracy. The proposed vibration dynamic model can detect larger blister areas by measuring the natural frequency, which can overcome the shortcomings of small ultrasonic detection areas in current actual industries. Thus, the practical online blister detection device is expected to be further developed.

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“…Research on wood component has also been more systematic, and the research work has covered wood beams, columns, shear walls, plates, etc. (Aicher et al 2016;Lahr et al 2017;Zhou et al 2021;Acuña et al 2023;Xu et al 2023). Due to the complexity of the anisotropic material constitutive model, it brings many difficulties to the numerical simulation of the wood structure.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of mechanical properties for wood frame and reinforced concrete frame based on deformation energy decomposition method

Sun,

Liang,

Wang

2023

BioRes

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As a typical orthotropic material, the mechanical properties of wood in the parallel and perpendicular-to-grain directions are very different. Based on mathematical orthogonality, mechanical force balance condition, and energy comparability, the deformation energy decomposition method of planar wood element is proposed, and then the quantitative and visual analysis of the basic deformation performance of wood structure is realized. The basic deformation performance of wood structure and isotropic structure is analyzed using the deformation energy decomposition method, and the seismic performance of wood frame structure and concrete frame structure is compared. The results show that the lateral resistance and beam ductility of wood frame are greater than those of concrete frame under seismic load. However, the reduction of deformation energy proportion of wood frame beam leads to greater deformation energy of the frame column, so it is suggested to take targeted strengthening measures to the bottom of the wood frame column and the joint area.

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Modulus of elasticity prediction through transversal vibration in cantilever beams and ultrasound technique of different wood species

Cited by 7 publications

References 48 publications

Synthesis and Mechanical Performances of Polyurethane Bio-Based Adhesives Resulted from the Depolymerization of Lignocellulose Biomass

Synthesis and Mechanical Performances of Polyurethane Bio-Based Adhesives Resulted from the Depolymerization of Lignocellulose Biomass

The Vibration Dynamic Model for Blister Detection in Medium-Density Fiberboard

Comparative analysis of mechanical properties for wood frame and reinforced concrete frame based on deformation energy decomposition method

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