Use of the cantilever beam vibration method for determining the elastic properties of maritime pine cross-laminated panels

Giaccu, Gian Felice; Meloni, Daniel; Concu, Giovanna; Valdés, Mónica; Fragiacomo, Massimo

doi:10.1016/j.engstruct.2019.109623

Cited by 7 publications

(5 citation statements)

References 29 publications

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“…The simple statistics presented in the paper were based on a mean and a standard deviation. They should be further extended, as shown by Giaccu et al [ 32 ], who applied a sensitivity analysis to the elastic modulus of plywood determination. An imperfections effect caused by a natural curvature of the samples on the vibration frequencies was small, as verified by numerical models performed with the finite element method.…”

Section: Discussionmentioning

confidence: 99%

Solution for Determining Modulus of Elasticity of Natural Materials Using Vibrations of Non-Uniform Circular Cross-Section Cantilevers

Podgórski

Kawecki

2023

Materials

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The article presents an original method for determining the modulus of elasticity of natural materials. A studied solution was based on vibrations of non-uniform circular cross-section cantilevers solved using Bessel functions. The derived equations, together with experimental tests, allowed for calculating the material’s properties. Assessments were based on the measurement of the free-end oscillations in time using the Digital Image Correlation (DIC) method. They were induced manually and positioned at the end of a cantilever and monitored in time using a fast Vision Research Phantom v12.1 Camera with 1000 fps. GOM Correlate software tools were then used to find increments of deflection on a free end in every frame. It provided us with the ability to make diagrams containing a displacement–time relation. To find natural vibration frequencies, fast Fourier transform (FFT) analyses were conducted. The correctness of the proposed method was compared with a three-point bending test performed on a Zwick/Roell Z2.5 testing machine. The presented solution generates trustworthy results and can provide a method to confirm the elastic properties of natural materials obtained in various experimental tests.

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Section: Discussionmentioning

confidence: 99%

Solution for Determining Modulus of Elasticity of Natural Materials Using Vibrations of Non-Uniform Circular Cross-Section Cantilevers

Podgórski

Kawecki

2023

Materials

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“…In recent years, a research has been started to evaluate the possibility of using Sardinian maritime pine as a structural material for laminated timber elements. This research addressed several aspects [40,41,[45][46][47][48][49][50][51] including physical-mechanical performance and grading problems, and revealed that the material has not particularly high mechanical characteristics, but it can be used profitably in construction systems such as CLT, which allows to mitigate the medium-low quality of the material thanks to the lamination and the cross arrangement of the layers. The basic physical-mechanical properties of Sardinian maritime pine, as they result from the research already carried out [40], are the following: average density at 12% moisture content = 466 kg/m 3 , average modulus of rupture (MoR) = 26,3 N/mm 2 , and average static modulus of elasticity (MoE) = 7160 N/mm 2 .…”

Section: Methodsmentioning

confidence: 99%

Prediction of Maritime Pine Boards Modulus of Elasticity by Means of Sonic Testing on Green Timber

Concu

2021

Applied Sciences

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Timber buildings are experiencing a rapid diffusion due to their good performance and their sustainability; however, some steps of structural timber production process, such as drying, are energy-intensive and environmentally impactful, and many wood species are also affected by low yield. Therefore, it would be important to determine the quality of the green material, that is, in wet condition, before undergoing the most impactful and expensive production steps. This paper describes a research aimed at quantifying the variation of the dynamic modulus of elasticity MoEdyn, which is commonly used for structural timber mechanical grading, from wet to dry condition in Sardinian maritime pine boards to be used for the production of laminated timber, and to examine the relationship between wet and dry MoEdyn. The MoEdyn was determined from measurements of the velocity of sonic waves propagating through the boards. The results show that the dry MoEdyn can be estimated starting from boards sonic testing in the wet condition, so providing a basis for implementing Sardinian maritime pine pre-grading in order to obtain the reduction of manufacturing costs, the abatement of environmental impact, and the increase of structural grade yield.

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“…Wang et al (2018) used the cantilever plate transient excitation method to simultaneously determine the elastic modulus, shear modulus, and Poisson's ratio of wood and medium-density fiberboard (MDF) by improving the strain gauge attachment method. Giaccu et al (2019) tested the elastic modulus and rolling shear modulus of a 3-layer cross-laminated timber (CLT) based on the cantilever plate transient excitation method. However, there has been a lack of research on non-destructive testing (NDT) methods in the field of strawboard.…”

Section: Introductionmentioning

confidence: 99%

Flexural vibration test method for determining the dynamic elastic modulus of full-size strawboards for use in transportation framed cases

Gu,

Xu,

Mwamba

et al. 2024

BioRes

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This paper proposes an improvement in the test method for determining the flexural dynamic modulus of elasticity of strawboard with two triangular prisms as supports, for quality control and classification. Free-plate modal and free-plate transient excitation methods were used to test the elastic modulus of 1/4-plate and whole-plate strawboards. The dynamic test results were verified with the four-point bending method and tensile method. The results show that the elastic moduli of strawboards is approximately 2 GPa. The dynamic test method proposed is efficient, simple, repeatable, and accurate. This method is more suitable for factory applications than existing dynamic testing methods. The framed cases produced by the strawboard all meet the performance requirements in GB/T 7284 (2016).

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Use of the cantilever beam vibration method for determining the elastic properties of maritime pine cross-laminated panels

Cited by 7 publications

References 29 publications

Solution for Determining Modulus of Elasticity of Natural Materials Using Vibrations of Non-Uniform Circular Cross-Section Cantilevers

Solution for Determining Modulus of Elasticity of Natural Materials Using Vibrations of Non-Uniform Circular Cross-Section Cantilevers

Prediction of Maritime Pine Boards Modulus of Elasticity by Means of Sonic Testing on Green Timber

Flexural vibration test method for determining the dynamic elastic modulus of full-size strawboards for use in transportation framed cases

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