文献类型：期刊文献

英文题名：Bending failure mechanism of bamboo scrimber

作者：Wang, Xueyu[1] Luo, Xiangya[1] Ren, Haiqing[1] Zhong, Yong[1]

通信作者：Zhong, Y[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing, Peoples R China

年份：2022

卷号：326

外文期刊名：CONSTRUCTION AND BUILDING MATERIALS

收录：;EI(收录号：20220811697647);Scopus(收录号：2-s2.0-85124978601);WOS:【SCI-EXPANDED(收录号:WOS:000770941800002)】；

基金：Acknowledgements We would like to thank the Fundamental Research Funds for the Chinese Academy of Forestry (CAFYBB2021ZX001) and the National Natural Science Foundation of China (32171883) for their financial support for this research.

语种：英文

外文关键词：Bamboo scrimber (BS); Bending failure mechanism; Bending properties; Brittle failure

摘要：Bamboo scrimber (BS) is becoming one of the most popular engineering bamboo composites because of its excellent physical and mechanical properties. In this study, four-point bending tests in conjunction with in-situ test methods were used to investigate the bending failure mechanism of BS, with nature bamboo (NB) as the reference comparison object. Both the macroscopic and microscopic bending properties were analyzed. Results indicated that the macroscopic load-displacement curves and micro failure morphology of BS showed a typical brittle failure, which was caused by the combined effect of tensile, shear and compressive stress. The elastic modulus of BS was significantly increased due to the increased concentration of sclerenchymatous cells per unit volume. The brittle failure mechanism of BS was shown to be strongly correlated to the compression of main energy absorption tissues contained in the cavities of vessels and parenchyma cells, the composite effect of brittle PF resin filling in the cavities, covering on the parenchyma cell wall and forming glue nails, and the decomposition of hemicellulose. This study was beneficial for the reasonable design and safe application of bamboo scrimber in practical engineering.