文献类型：期刊文献

英文题名：Compressive Failure Mechanism of Structural Bamboo Scrimber

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

通信作者：Ren, HQ[1]|[a0005812e0f3d391949bb]任海青;

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China

年份：2021

卷号：13

期号：23

外文期刊名：POLYMERS

收录：;EI(收录号：20215011300463);Scopus(收录号：2-s2.0-85120702863);WOS:【SCI-EXPANDED(收录号:WOS:000734350200001)】；

基金：Funding: This research was funded by Chinese Academy of Forestry (CAFYBB2021ZX001).

语种：英文

外文关键词：compression performance; load-displacement curves; digital image correlation (DIC); failure mode

摘要：Bamboo scrimber is one of the most popular engineering bamboo composites, owing to its excellent physical and mechanical properties. In order to investigate the influence of grain direction on the compression properties and failure mechanism of bamboo scrimber, the longitudinal, radial and tangential directions were selected. The results showed that the compressive load-displacement curves of bamboo scrimber in the longitudinal, tangential and radial directions contained elastic, yield and failure stages. The compressive strength and elastic modulus of the bamboo scrimber in the longitudinal direction were greater than those in the radial and tangential directions, and there were no significant differences between the radial and tangential specimens. The micro-fracture morphology shows that the parenchyma cells underwent brittle shear failure in all three directions, while the fiber failure of the longitudinal compressive specimens consisted of ductile fracture, and the tangential and radial compressive specimens exhibited brittle fracture. This is one of the reasons that the deformation of the specimens under longitudinal compression was greater than those under tangential and radial compression. The main failure mode of bamboo scrimber under longitudinal and radial compression was shear failure, and the main failure mode under tangential compression was interlayer separation failure. The reason for this difference was that during longitudinal and radial compression, the maximum strain occurred at the diagonal of the specimen, while during tangential compression, the maximum strain occurred at the bonding interface. This study can provide benefits for the rational design and safe application of bamboo scrimber in practical engineering.