Measurement of the elastic parameters of densified balsam fir wood in the radial-tangential plane using a digital image correlation (DIC) method

Li, Ling; Gong, Meng; Chui, Ying Hei; Schneider, Marc; Li, Dagang

doi:10.1007/s10853-013-7593-1

Cited by 17 publications

(11 citation statements)

References 18 publications

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“…The conventional DIC technique calculates surface displacement between a gray scale pattern in an undeformed image and the corresponding grey scale pattern from a deformed image. A first-order shape function is applied to approximate the variation in displacement field and calculate the strain [24]. With the DIC, many properties of wood can be evaluated.…”

Section: Introductionmentioning

confidence: 99%

Impact of a reinforcement treatment with acrylate impregnation on the mechanical behavior of black spruce as connector member

Lafond

Blanchet

Galimard³

et al. 2017

Construction and Building Materials

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As a previous study has shown, it is possible to increase by 50% the dowel bearing strength of black spruce with an acrylate formulation applied by impregnation. Three diameters of bolts and two orientations of loading were included in this study. The effect of treatment on the dowel-bearing strength appeared to increase while the diameter of bolt decreased. The orientation of loading was significant as the treatment had a major impact in the parallel to grain direction and no impact in the perpendicular direction. With the digital image correlation analysis, an expanded strain field perpendicular to the load direction was observed. The superior embedding capacity would help to reduce the dimensions of the timbers as well as the number of connections required in the building design. With an increase of ductility, wood connections show a safer yielding behavior.

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Section: Introductionmentioning

confidence: 99%

Impact of a reinforcement treatment with acrylate impregnation on the mechanical behavior of black spruce as connector member

Lafond

Blanchet

Galimard³

et al. 2017

Construction and Building Materials

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“…Kuo et al [14] used the DIC technology to analyze Poisson's ratio of earlywood and latewood. Li et al [15] employed the DIC technology to measure the modulus of elasticity, shear modulus, and Poisson's ratio of dense balsam fir wood. Moreover, the author measured the strain field of the specimen under compressive loading.…”

Section: Introductionmentioning

confidence: 99%

Fine Characterization and Analysis of Drying Strain of the ELM Board via DIC Technology

Liu¹,

Zhu²,

Jin³

et al. 2023

Journal of Renewable Materials

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In this paper, the occurrence and development mechanism of strain on the cross-section during the wood drying is explored. Therefore, strain regularity on the cross-section of 50 mm thickness elm (Ulmus rubra) board at the temperature of 40°C and 80°C is detected via digital image correlation technology. Hence, the difference between tangential and radial strain at surface and core layers was denoted. The results showed that strain distribution in the width direction of the board is uneven. Moreover, a large drying shrinkage strain occurs at the near-core layer, while the maximum strain difference reaches 4.08%. Hence, the surface of the board is cracked along the thickness direction. The radial strain of the board is higher than the tangential strain in the early stage of drying, while these strains are reversed in the later stage of drying. The temperature is related to the difference between the tangential and radial strains of the elm board. These differences at the core layer are larger than those of the surface layer. The conducted research results provide a theoretical basis for process optimization.

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“…These techniques are being increasingly used in diverse applications since these are contact-free and provide full-field measurements. Among these techniques, digital image correlation (DIC) [19][20][21][22][23][24][25][26] and the grid method [27][28][29] have been exponentially used in the recent past due to their simplicity and good balance between spatial resolution and accuracy. The 2D-DIC subsetbased correlation technique is highlighted and is used in this work.…”

Section: Introductionmentioning

confidence: 99%

Identification of Orthotropic Elastic Properties of Wood by a Synthetic Image Approach Based on Digital Image Correlation

2022

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This work aims to determine the orthotropic linear elastic constitutive parameters of Pinus pinaster Ait. wood from a single uniaxial compressive experimental test, under quasi-static loading conditions, based on two different specimen configurations: (a) on-axis rectangular specimens oriented on the radial-tangential plane, (b) off-axis specimens with a grain angle of about 60(radial-tangential plane). Using digital image correlation (DIC), full-field displacement and strain maps are obtained and used to identify the four orthotropic elastic parameters using the finite element model updating (FEMU) technique. Based on the FE data, a synthetic image reconstruction approach is proposed by coupling the inverse identification method with synthetically deformed images, which are then processed by DIC and compared with the experimental results. The proposed methodology is first validated by employing a DIC-levelled FEA reference in the identification procedure. The impact of the DIC setting parameters on the identification results is systematically investigated. This influence appears to be stronger when the parameter is less sensitive to the experimental setup used. When using on-axis specimen configuration, three orthotropic parameters of Pinus pinaster (ER, ET and νRT) are correctly identified, while the shear modulus (GRT) is robustly identified when using off-axis specimen configuration.

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Measurement of the elastic parameters of densified balsam fir wood in the radial-tangential plane using a digital image correlation (DIC) method

Cited by 17 publications

References 18 publications

Impact of a reinforcement treatment with acrylate impregnation on the mechanical behavior of black spruce as connector member

Impact of a reinforcement treatment with acrylate impregnation on the mechanical behavior of black spruce as connector member

Fine Characterization and Analysis of Drying Strain of the ELM Board via DIC Technology

Identification of Orthotropic Elastic Properties of Wood by a Synthetic Image Approach Based on Digital Image Correlation

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