Open Access

ARTICLE

Evaluation of Mechanical Properties of Cross-Laminated Timber with Different Lay-ups Using Japanese Larch

Yingchun Gong^1,#,*, Fenglu Liu^2,#, Zhaopeng Tian¹, Guofang Wu¹, Haiqing Ren¹, Cheng Guan²

1 Research Institute of Forestry New Technology, Chinese Academy of Forestry, Beijing, 100091, China.
2 School of Technology, Beijing Forestry University, Beijing , 10083, China.
#These authors contributed to the work equally and should be regarded as co-first authors.

*Corresponding Author: Yingchun Gong. Email: .

(This article belongs to the Special Issue: Bio-composite Materials and Structures)

Journal of Renewable Materials 2019, 7(10), 941-956. https://doi.org/10.32604/jrm.2019.07354

Abstract

Japanese larch is one of the main plantation tree species in China. A lack of engineered wood products made by Japanese larch , limits its application in wood structures. In this study, based on optimum process para meters, such as pressure (1.2 MPa), adhesive spread rate (200 g/m 2 ) and adhesive (one component polyurethane), the mechanical properties of Japanese larch made cross laminated timber ( with different lay ups were evaluated by means of the static method . Results of this study show ed that variations in lay ups significant ly affected the mechanical properties of CLT. The strength and modulus of bending and parallel compression for CLT increased with the thickness of lumber w hile that o f bending, parallel compression and rolling shear all decreased with the number of layers. Thickness, layup orientation and the number of layers all had an impact on the strength of CLT. Failure modes obtained from numerical simulation w ere basically the s ame as th ose of expe rimental test s . There was also strong alignment between theoretical value and test value for effective bending stiffness and shear stiffness. Thus, the shear analogy method can be used to predict the mechanical properties of CLT effecti vely. This study pro ve d great potential in using Japanese larch wood for manufactur ing CLT due to its good mechanical properties

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