[1]黄东升,潘文平,周爱萍,等.重组竹Ⅱ型断裂特性试验研究[J].东南大学学报(自然科学版),2018,48(6):1076-1081.[doi:10.3969/j.issn.1001-0505.2018.06.013]
 Huang Dongsheng,Pan Wenping,Zhou Aiping,et al.Experimental study on mode-Ⅱ fracture characteristics of parallel strand bamboo[J].Journal of Southeast University (Natural Science Edition),2018,48(6):1076-1081.[doi:10.3969/j.issn.1001-0505.2018.06.013]
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重组竹Ⅱ型断裂特性试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
48
期数:
2018年第6期
页码:
1076-1081
栏目:
材料科学与工程
出版日期:
2018-11-20

文章信息/Info

Title:
Experimental study on mode-Ⅱ fracture characteristics of parallel strand bamboo
作者:
黄东升1潘文平12周爱萍1王骁睿12许嘉诺3
1南京林业大学生物质材料国家地方联合工程研究中心, 南京 210037; 2Faculty of Forestry and Environment Management, University of New Brunswick, New Branswick E3B5A3, Canada; 3南京工业大学建筑学院, 南京 211800
Author(s):
Huang Dongsheng1 Pan Wenping12 Zhou Aiping1 Wang Xiaorui12 Xu Jianuo3
1National-Provincial Joint Engineering Research Center of Biomaterials, Nanjing Forestry University, Nanjing 210037, China
2Faculty of Forestry and Environment Management, University of New Brunswick, New Branswick E3B5A3, Canada
3School of Architecture, Nanjing TECH University, Nanjing 211800, China
关键词:
重组竹 Ⅱ型断裂 ENF试验 应变能释放率 断裂韧度 R曲线
Keywords:
parallel strand bamboo mode-Ⅱ fracture end notched flexure method energy release rate fracture toughness R-curve
分类号:
TU531.3
DOI:
10.3969/j.issn.1001-0505.2018.06.013
摘要:
为研究重组竹顺纹Ⅱ型裂纹扩展条件,进行了ENF(end notched flexure)断裂试验.分别采用柔度标定法和修正梁理论计算了临界应变能释放率,对比了2种方法的优缺点,并研究了重组竹顺纹Ⅱ型断裂R曲线,计算了重组竹的断裂韧度.结果表明:重组竹顺纹Ⅱ型裂纹的扩展具有自相似性,构件破坏经历断裂过程区FPZ(fracture process zone)发展和裂纹扩展2个阶段,FPZ的发展使得R曲线在加载初期表现出增长趋势,而裂纹扩展阶段R曲线基本保持水平;临界能量释放率GⅡC是与初始裂纹长度无关的常数,断裂韧度KⅡC平均值为4 079 kN/m3/2,其值大约是常见木材的2倍.
Abstract:
To study the Mode-Ⅱ fracture characteristics of parallel strand bamboo(PSB)composite, an end notched flexure(ENF)test was conducted. The critical energy release rate was evaluated by a compliance calibration method and the corrected beam theory, respectively. The R-curve and the fracture toughness were obtained. The results show that the crack propagation of mode-Ⅱ fracture is self-similar cracking when cracks are parallel to the strand; the fracture process goes through two periods: fracture process zone(FPZ)development and crack propagation; R-curve firstly exhibits an increasing manner with crack growth due to FPZ development, and then the curve becomes approximately horizontal during crack propagation; the critical energy release rate is a constant independent of the initial crack length; the mean value of fracture toughness KⅡc is 4 079 kN/m3/2, its value is about two times that of common wood products.

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备注/Memo

备注/Memo:
收稿日期: 2016-11-05.
作者简介: 黄东升(1964—),男,博士,教授,dshuang@njfu.edu.cn.
基金项目: 国家自然科学基金资助项目(51578291)、国家重点研发计划资助项目(2017YFF0207203-04)、江苏省高校优势学科建设资助项目.
引用本文: 黄东升,潘文平,周爱萍,等.重组竹Ⅱ型断裂特性试验研究[J].东南大学学报(自然科学版),2018,48(6):1076-1081. DOI:10.3969/j.issn.1001-0505.2018.06.013.
更新日期/Last Update: 2018-11-20