Axial compressive behavior of Moso Bamboo and its components with respect to fiber-reinforced composite structure  

作　　者：Xuexia Zhang Zixuan Yu Yan Yu Hankun Wang Jinghao Li 

机构地区：[1]Department of Biomaterials,International Center for Bamboo and Rattan,Beijing 100102,People’s Republic of China [2]SFA and Beijing Co-built Key Laboratory of Bamboo and Rattan Science and Technology,State Forestry Administration,Beijing 100102,People’s Republic of China [3]Forest Products Laboratory,U.S.Forest Service,Wisconsin,WI 53726,USA

出　　处：《Journal of Forestry Research》2019年第6期2371-2377,共7页林业研究（英文版）

基　　金：supported by Basic Scientific Research Funds of International Center for Bamboo and Rattan(1632016007);the National Science Foundation of China(31400519)

摘　　要：Bamboo is a unique fiber-reinforced bio-composite with fibers embedded into a parenchyma cell matrix.We conducted axial compression tests on bamboo blocks prepared from bottom to top,and from inner to outer portions of the culm.The apparent Young’s modulus and compressive strength of whole thickness bamboo blocks exhibited slight increases with increasing height along the culm,due to slight increases of fiber volume fraction(Vf)from 28.4 to 30.4%.Other blocks showed a significant increase in apparent Young’s modulus and strength from the inner to outer part of the culm wall,mainly owing to a sharp increase of Vf from 17.1 to 59.8%.With a decrease of fiber fraction volume there was a transition from relatively brittle behavior to very ductile behavior in bamboo blocks.Results indicated that stiffness and strength of bamboo was primarily due to fiber in compression,and ductility of bamboo was provided by the parenchyma cell matrix acting as a natural fiber-reinforced composite.Bamboo is a unique fiber-reinforced bio-composite with fibers embedded into a parenchyma cell matrix.We conducted axial compression tests on bamboo blocks prepared from bottom to top, and from inner to outer portions of the culm. The apparent Young’s modulus and compressive strength of whole thickness bamboo blocks exhibited slight increases with increasing height along the culm, due to slight increases of fiber volume fraction(V_f)from 28.4 to 30.4%. Other blocks showed a significant increase in apparent Young’s modulus and strength from the inner to outer part of the culm wall, mainly owing to a sharp increase of V_f from 17.1 to 59.8%. With a decrease of fiber fraction volume there was a transition from relatively brittle behavior to very ductile behavior in bamboo blocks.Results indicated that stiffness and strength of bamboo was primarily due to fiber in compression, and ductility of bamboo was provided by the parenchyma cell matrix acting as a natural fiber-reinforced composite.

关 键 词：BAMBOO AXIAL COMPRESSIVE behavior Functionally GRADE STRUCTURE 

分 类 号：S[农业科学]