文献详情
Water effects on the deformation and fracture behaviors of the multi-scaled cellular fibrous bamboo
文献类型期刊
作者Chen, Guowei[1];Luo, Hongyun[2];Yang, Haoyu[3];Zhang, Tao[4];Li, Sijie[5]
机构
通讯作者Luo, HY (reprint author), Beijing Univ Aeronaut & Astronaut, Sch Mat Sci & Engn, Beijing, Peoples R China.
来源信息年:2018  卷:65  页码范围:203-215  
期刊信息ACTA BIOMATERIALIA影响因子和分区  ISSN:1742-7061
关键词Cellular fibrous bamboo; Multi-scaled structures; Fracture behaviors; Structural-molecular toughening; Acoustic emission
增刊正刊
摘要Natural bamboo with different water weight contents (0%, 6% and 22%) had distinguishingly different mechanical properties, where samples with water contents of 22% had tensile strength and elongations increased by similar to 30% and similar to 200% than the dry (0%), respectively. The deformation and fracture process was synchronously recorded and analyzed with the aid of the acoustic emission (AE), during which there were three kinds of real time fracture behaviors recognized: matrix (multi-walled parenchyma cells) failure, interfacial (fiber/fiber or fiber/parenchyma cell walls) dissociations and fiber breakage. More interfacial dissociations and higher fracture energy were detected as more water was added, since water molecules can make great differences on the bamboo's inner micro-structures and the mechanical properties. During the fracture process of the wet bamboo detected by AE, matrix failure and interfacial dissociations contributed most of the elongation, and the strength were mainly depended on the fiber breakage and interfacial dissociations. The discovered structural toughening mechanisms within the multi-scaled structures were microfiber bridging, multi-walled fiber pull-out, micro warts buckling and crack deflection. The micro-structural toughening effects were strengthened by the cellulose-hemicellulose-lignin complexes and a certain content of water molecules within the multi-scaled fibrous cellular structures, which are collaboratively working and ensuring the high mechanical performance of the natural bamboo. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
收录情况SCIE(WOS:000418315900018)  PubMed(28987785)  
所属部门材料科学与工程学院
链接地址https://www.scopus.com/inward/record.uri?eid=2-s2.0-85032721851&doi=10.1016%2fj.actbio.2017.10.005&partnerID=40&md5=bffaab9ab8554a2466746489a1237d1a
DOI10.1016/j.actbio.2017.10.005
百度学术Water effects on the deformation and fracture behaviors of the multi-scaled cellular fibrous bamboo
语言外文
被引频次11
人气指数237
浏览次数237
基金National Natural Science Foundations of China [51175023, U1537212]; Ministry of Science and Technology (China) [2015BAF06801-3, 2015BAG20B04, 2016YFF0203301, 2016YFC0801903]
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