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Materials 2015, 8(10), 7059-7073; doi:10.3390/ma8105362

Numerical Analysis of the Bending Properties of Cathay Poplar Glulam

1,2,3,* , 1,2,3
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,
4
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1
MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing 100083, China
2
Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
3
MOE Engineering Research Center of Forestry Biomass Materials and Bioenergy, Beijing Forestry University, Beijing 100083, China
4
Beijing University of Civil Engineering and Architecture, Beijing 100044, China
5
Suzhou Grownhomes Co., Ltd., Suzhou 215105, China
*
Author to whom correspondence should be addressed.
Academic Editor: Mark Whittaker
Received: 11 June 2015 / Revised: 24 September 2015 / Accepted: 28 September 2015 / Published: 19 October 2015
(This article belongs to the Special Issue Failure Analysis in Materials)
View Full-Text   |   Download PDF [2820 KB, uploaded 19 October 2015]   |  

Abstract

This paper presents the formulae and finite element analysis models for predicting the Modulus of Elastic (MOE) and Modulus of Rupture (MOR) of Cathay poplar finger-jointed glulam. The formula of the MOE predicts the MOE of Cathay poplar glulam glued with one-component polyurethane precisely. Three formulae are used to predict the MOR, and Equation (12) predicts the MOR of Cathay poplar glulam precisely. The finite element analysis simulation results of both the MOE and MOR are similar to the experimental results. The predicted results of the finite element analysis are shown to be more accurate than those of the formulae, because the finite element analysis considers the glue layers, but the formulae do not. Three types of typical failure modes due to bending were summarized. The bending properties of Cathay poplar glulam were compared to those of Douglas fir glulam. The results show that Cathay poplar glulam has a lower stiffness, but a marginally higher strength. One-component polyurethane adhesive is shown to be more effective than resorcinol formaldehyde resin adhesive for Cathay poplar glulam. This study shows that Cathay poplar has the potential to be a glulam material in China. View Full-Text
Keywords: structural glued-laminated timber (glulam); Chinese domestic Cathay poplar; mechanical tests; bending properties; checking calculation; formulae; finite element analysis structural glued-laminated timber (glulam); Chinese domestic Cathay poplar; mechanical tests; bending properties; checking calculation; formulae; finite element analysis
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Gao, Y.; Wu, Y.; Zhu, X.; Zhu, L.; Yu, Z.; Wu, Y. Numerical Analysis of the Bending Properties of Cathay Poplar Glulam. Materials 2015, 8, 7059-7073.

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