Finite element analysis of bending stiffness for cross-laminated timber with varying board width

Bamboo-wood composite cross-laminated timber (BCLT) is a new kind of wood structure material. Studies of the mechanical properties of BCLT have the potential to improve its utilization. Compared with the traditional testing method, this paper designs a fast and effective nondestructive testing method. Three types of composite BCLT plates were designed and made. Multi-point sampling of unit-converted timber was done using a 900-1700 nm NIR spectrometer. Mechanical properties of the unit converted timber were obtained through a four-point bending experiment. The data set consisted of near-infrared spectrum data and mechanical property data. The NIR prediction model was obtained by partial least squares method. The coefficients of determination for the density, MOR and MOE prediction models were 0.88, 0.88, and 0.85, respectively. Finally, the finite element modeling analysis of BCLT plate was carried out according to the element material prediction model, and the prediction of mechanical properties of BCLT plate was achieved. For the three BCLT plates, the prediction error of the finite element model was less than 10%, showing that the finite element analysis method is feasible to predict the mechanical properties of BCLT plate.

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Experimental Modal Analysis of Appropriate Boundary Conditions for the Evaluation of Cross-Laminated Timber Panels for an In-Line Approach

Forest Products Journal ◽

10.13073/fpj-d-20-00062 ◽

2021 ◽

Vol 71 (2) ◽

pp. 161-170

Author(s):

Adam Faircloth ◽

Loic Brancheriau ◽

Hassan Karampour ◽

Stephen So ◽

Henri Bailleres ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Boundary Conditions ◽

Modal Analysis ◽

Experimental Testing ◽

Critical Role ◽

Element Analysis ◽

Cross Laminated Timber ◽

Simply Supported ◽

The Finite Element Analysis

Abstract Transverse modal analysis of timber panels is a proven effective alternative method for approximating a material's elastic constants. Specific testing configurations, such as boundary conditions (BC) and location of sensor and impact, play a critical role in the accuracy of the results obtained from the experimental assessment. This article investigates signal-specific details, such as the signal quality factor, that directly relate to the damping properties and internal friction as well as frequency shifting obtained from six different BCs. A freely supported (FFFF), opposing minor sides (shorter length) simply supported, and major sides (longest length) free (SFSF), as well as the reverse of the SFSF configuration with minor sides free and major lengths simply supported (FSFS) and all sides simply supported (SSSS) setup, are investigated. Variations into the proposed methods used to achieve an FFFF supported system are also considered. A combination of experimental testing in parallel with finite element analysis was conducted to re-create the setup that would be used within a manufacturing facility for nondestructive assessment of full-size cross-laminated timber panels. The differences between all BC configurations for their resonance frequency quality and location indicate that a freely supported system provides higher-resolution results, good comparison of less than 10 percent error with the finite element analysis and experimental results, and advantages in a simple experimental setup for the intended application.

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Test and Simulation Study on Stiffness of Automotive Door

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.239-240.690 ◽

2012 ◽

Vol 239-240 ◽

pp. 690-693

Author(s):

Hui Ding ◽

Hong Zhou ◽

Yong Lian Ren

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Simulation Study ◽

Bending Stiffness ◽

Torsional Stiffness ◽

Element Analysis ◽

Deformation Curves

Automotive door must have adequate stiffness as the important component of an automobile. In this paper, firstly, bending stiffness, torsional stiffness and sinking stiffness of an automotive door were simulated, got the deformation curves of the door in the three conditions. Then an experiment was used to verify the result of finite element analysis. These two methods complemented each other. The stiffness of the door was studied and analyzed by two methods, provided a reference for the improvement of the door.

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Finite Element Analysis of Dynamic Characteristics and Bending Stiffness for Cross Laminated Timber Floor Panels with and without Openings

Drvna industrija ◽

10.5552/drvind.2021.2037 ◽

2021 ◽

Vol 72 (4) ◽

pp. 373-379

Author(s):

Ljiljana Kozarić ◽

Smilja Bursać ◽

Martina Vojnić Purčar ◽

Miroslav Bešević ◽

Žikica Tekić

Keyword(s):

Finite Element ◽

Dynamic Characteristics ◽

Structural Characteristics ◽

Longitudinal Direction ◽

Bending Stiffness ◽

Full Potential ◽

Element Analysis ◽

Cross Laminated Timber ◽

Additional Service ◽

Floor System

The aim of this paper is to present numerical investigations of dynamic characteristics and bending stiffness for cross laminated timber floor panels with and without service openings. Five-layer panels with the outer layers oriented in the longitudinal direction of the panel have been analyzed. In order to explore the full potential of this floor system using a limited number of measurements and structural tests, models based on the finite element method have been proposed, validated against experimental results and then used to investigate the effect of opening position in the floor on main structural performance parameters. The results showed that, when the need for additional service opening appears, a slight decrease of the main structural characteristics of the cross laminated timber floor panels is achievable with an adequate geometrical position of the opening in the floor.

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