scholarly journals Influence of Lamination Aspect Ratios and Test Methods on Rolling Shear Strength Evaluation of Cross-Laminated Timber

2019 ◽  
Vol 31 (12) ◽  
pp. 04019310 ◽  
Author(s):  
Minghao Li ◽  
Wenchen Dong ◽  
Hyungsuk Lim
Keyword(s):  
Shear Strength ◽  
Test Methods ◽  
Rolling Shear ◽  
Strength Evaluation ◽  
Cross Laminated Timber ◽  
Aspect Ratios

scholarly journals Evaluation of the effect of knots on rolling shear strength of cross laminated timber (CLT)

2019 ◽  
Vol 222 ◽  
pp. 579-587 ◽  
Author(s):  
Yawei Cao ◽  
Jason Street ◽  
Minghao Li ◽  
Hyungsuk Lim
Keyword(s):  
Shear Strength ◽  
Rolling Shear ◽  
Cross Laminated Timber

The effect of edge gaps on shear strength and rolling shear modulus of cross laminated timber panels

2020 ◽  
Vol 259 ◽  
pp. 119710
Author(s):  
Charles Gardner ◽  
William G. Davids ◽  
Roberto Lopez-Anido ◽  
Benjamin Herzog ◽  
Russell Edgar ◽  
...  
Keyword(s):  
Shear Strength ◽  
Shear Modulus ◽  
Rolling Shear ◽  
Cross Laminated Timber

scholarly journals Shear strength properties of hybrid (hinoki cypress and Japanese cedar) cross-laminated timber

2021 ◽  
Vol 67 (1) ◽  
Author(s):  
Seiichiro Ukyo ◽  
Atsushi Miyatake ◽  
Kenta Shindo ◽  
Yasushi Hiramatsu
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Regression Line ◽  
Japanese Cedar ◽  
Cross Layer ◽  
Rolling Shear ◽  
Hinoki Cypress ◽  
Analogy Method ◽  
Cross Laminated Timber ◽  
The Cross

AbstractIn this study, the out-of-plane shear strength of hybrid cross-laminated timber (CLT) with outer layers of hinoki (hinoki cypress, Chamaecyparis obtusa) and inner layers of sugi (Japanese cedar, Cryptomeria japonica) is investigated for four different layer configurations. To investigate the influence from rolling shear properties of cross layers on the shear strength of CLT, stress analysis was conducted using the shear analogy method. The nominal shear strength, the maximum shear force divided by the cross-section of CLT, was in the 1.0–2.1 MPa range. Using the shear analogy method, the rolling shear modulus in the cross layer was determined as 72.9 MPa, which was comparable with the value obtained for laminae in previous study as well as the value confirmed by strain measurements in the present study. The magnitude of rolling shear stress in the cross layer was 0.9–1.1 times the average shear stress, which was negatively correlated with the nominal shear strength. From the regression line between the nominal shear strength and the magnitude of the shear stress in the cross layer, the mean shear strength of the cross layer was estimated to be 1.33 MPa.

scholarly journals Effects of Grain Pattern on the Rolling Shear Properties of Wood in Cross-Laminated Timber

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 668
Author(s):  
Guofang Wu ◽  
Yong Zhong ◽  
Haiqing Ren
Keyword(s):  
Shear Modulus ◽  
Mechanical Performance ◽  
Wood Products ◽  
Rolling Shear ◽  
Shear Moduli ◽  
Factors Affecting ◽  
Cross Laminated Timber ◽  
Aspect Ratios ◽  
Shear Property ◽  
Pure Rolling

Rolling shear modulus and strength are the key factors affecting the mechanical performance of some wood products such as cross-laminated timber (CLT). As reported, rolling shear property strongly depends on the sawing pattern such as the aspect ratio and grain direction (grain mode). However, the mechanism behind this phenomenon has not yet been clarified. In this work, the rolling shear modulus and strength of spruce-pine-fir (SPF) with different grain modes and aspect ratios were experimentally investigated. In addition, a theoretical investigation was carried out to reveal the mechanism behind this phenomenon. The results exhibited that the rolling shear moduli of 0° and 90° grain-mode wood were the same. This value can be called the pure rolling shear modulus. Rolling shear modulus of wood with angles other than 0° and 90° can be calculated from the pure rolling shear modulus and grain angle. Therefore, this modulus can be called the apparent rolling shear modulus. Thus, using 0° and 90° grain-mode specimens to determine the pure rolling shear modulus and strength of wood is recommended.

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