3D characterization of vascular bundle in moso bamboo node and its effect on compressive properties

Qi Chen; Yingyue He; Shaozhi Lai; Jinqiu Qi; Shaobo Zhang; Shanshan Jia; Hui Xiao; Yuzhu Chen; Yongze Jiang; Benhua Fei; Jiulong Xie

doi:10.1515/hf-2022-0177

Article

3D characterization of vascular bundle in moso bamboo node and its effect on compressive properties

Qi Chen , Yingyue He , Shaozhi Lai , Jinqiu Qi , Shaobo Zhang , Shanshan Jia , Hui Xiao , Yuzhu Chen , Yongze Jiang , Benhua Fei and Jiulong Xie

Published/Copyright: March 3, 2023

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From the journal Holzforschung Volume 77 Issue 5

Abstract

The structure of the bamboo node obviously differs from that of the internode and largely affects the mechanical properties of bamboo. However, the node structure of moso bamboo, an important economic and ecologic bamboo species, was still unclear. Thus, in this study, the 3D structural changes of the vascular bundle (VB) in the moso bamboo node were visualized and quantified. The compressive properties and failure mechanisms of the bamboo node were discussed based on the structural changes. The results showed that the horizontal VB in bamboo node was classified into three types: branching, cross-linking, and thickening. The cross-sectional area of the vertical VB in bamboo node increased, and the vertical VBs shifted to the outer side after passing through the node. Due to the “wire hoop” effect of the horizontal VBs, the longitudinal compressive strength of the node was greater than that of the internode. The deflection of VBs caused slippage between VBs and resulted in the decrease of the node’s transversal compressive strength. This research provided key information for a deeper understanding of the structure and mechanical properties of bamboo for potential applications.

Keywords: 3D structure; compressive properties; failure mechanism; moso bamboo node; vascular bundle

Corresponding authors: Benhua Fei, Department of Biomaterials, International Centre for Bamboo and Rattan, Beijing 100102, P. R. China; and SFA and Beijing Co-built Key Laboratory of Bamboo and Rattan Science & Technology, State Forestry Administration, Beijing 100102, P. R. China, E-mail: feibenhua@icbr.ac.cn; and Jiulong Xie, College of Forestry, Sichuan Agricultural University, Chengdu, Sichuan 611130, P. R. China, E-mail: jxie6@sicau.edu.cn

Funding source: National Natural Science Foundation of China

Award Identifier / Grant number: 32201639

Award Identifier / Grant number: 31901373

Funding source: Forestry Industry Technology Research and Development with Rural Industrial Revolution Characteristic from Guizhou Provincial Forestry Bureau

Award Identifier / Grant number: No. GZMC-ZD20202112

Funding source: National Natural Science Foundation of Sichuan Province, China

Award Identifier / Grant number: 2023NSFSC5841, 2022NSFSC1034

Author contributions: Qi Chen and Yingyue He contributed equally to this work. Qi Chen: experiment, formal analysis, writing – original draft, project administration. Yingyue He: resources, experiment, review. Shaozhi Lai: experiment, formal analysis. Jinqiu Qi: resources, review. Shaobo Zhang: methodology. Shanshan Jia: methodology, review. Hui Xiao: software, review. Yuzhu Chen: pictures. Yongze Jiang: resources. Benhua Fei: methodology, writing – review & editing, conceptualization, project administration. Jiulong Xie: conceptualization, funding acquisition, project administration.
Research funding: We would like to thank National Natural Science Foundation of China (nos. 32201639, 31901373), Forestry Industry Technology Research and Development with Rural Industrial Revolution Characteristic from Guizhou Provincial Forestry Bureau (no. GZMC-ZD20202112), and National Natural Science Foundation of Sichuan Province, China (nos. 2023NSFSC5841, 2022NSFSC1034) for their financial support of this research.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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