文献类型：期刊文献

英文题名：Fracture mechanisms of moso bamboo (Phyllostachys pubescens) under longitudinal tensile loading

作者：Wang, Dong[1,2] Lin, Lanying[1] Fu, Feng[1]

第一作者：Wang, Dong

通信作者：Lin, LY[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Nanjing Forestry Univ Mat & Sci & Engn, Nanjing 210037, Peoples R China

年份：2020

卷号：153

外文期刊名：INDUSTRIAL CROPS AND PRODUCTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000540709700025)】；

基金：This work was supported by the Natural Science Foundation of China (No.31770597).

语种：英文

外文关键词：Bamboo; Fibre; Parenchyma cell; Longitudinal tensile fracture

摘要：In this paper, the longitudinal tensile fracture behaviours of moso bamboo (Phyllostachys pubescens), especially at the cell wall scale, were analyzed by the digital speckle correlation method (DSCM) and atomic force microscopy (AFM). The results indicated that strain concentration and initial cracks generally occurred in the parenchyma tissue, indicating that it was a mechanically weak point. The initial crack caused two types of parenchyma cell fractures: intercellular breakage along the interface of compound middle lamella (CML) and secondary wall, and transverse transwall fracturing. The fibre bundles restricted crack propagation by extensively deflecting cracks. Interfacial debonding was observed on the fracture surfaces of the fibres or parenchyma cells at the cell wall level. In cells that experienced transverse transwall fracture, broad layers were pulled out from between two adjacent narrow layers. Furthermore, crack propagation along the longitudinal fibres caused fibre debonding along the S0/S1 interface layer. The effects of crack deflection and interfacial debonding were the primary mechanisms responsible for the remarkable fracture toughness of bamboo.