文献类型：期刊文献

中文题名：用数字散斑相关方法研究竹材在拉伸载荷下的断裂行为

英文题名：Experimental Study of the Fracture Behavior of Bamboo Under Tension Based on Digital Speckle Correlation Method

作者：云礼宁[1] 马少鹏[1] 李霞镇[2] 任海青[2]

第一作者：云礼宁

通信作者：Ma, S.-P.

机构：[1]北京理工大学宇航学院;[2]中国林业科学研究院木材工业研究所

年份：2011

卷号：31

期号：3

起止页码：258-261

中文期刊名：北京理工大学学报

外文期刊名：Transactions of Beijing Institute of Technology

收录：CSTPCD;;EI(收录号：20112013990135);Scopus(收录号：2-s2.0-79955978064);北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家"十一五"科技支撑计划项目(2008BADA9B03);国家自然科学基金资助项目(10972038)

语种：中文

中文关键词：竹材;断裂韧性;数字散斑相关方法;裂纹张开位移

外文关键词：moso bamboo; fracture toughness; digital speckle correlation methed（DSCM）; crack opening displacement（COD）

分类号：O348.1

摘要：用数字散斑相关方法(DSCM)实验研究了无预制裂纹的毛竹试件在拉伸载荷下的断裂行为.基于试件表面的图像以及DSCM测量的位移场和应变场,分析和总结了竹材的断裂失效模式和破坏机理,定量测量了竹材的断裂韧性.研究发现竹材试件在拉伸时先在竹黄部分出现横向裂纹,此裂纹进而向竹肉横向稳定扩展,加载继续进行时裂纹会突然转为纵向并发生失稳扩展,使试件沿纤维方向破坏.通过DSCM测量得到的位移场获得了裂纹的临界张开位移,计算得到实验用竹材的断裂韧性KⅠc=4.2MPa.m0.5.
The fracture behavior of moso bamboo under tensile load was experimentally studied using digital speckle correlation method（DSCM）.Based on the captured images and the DSCM measured displacement and strain fields,the classic fracture mode and mechanism of the bamboo was analyzed and summarized,and the fracture toughness of bamboo was quantitatively measured.The experimental results show that,when the specimen is loading,a transverse crack firstly appeares in the Shiraia bambusicola and then expands to the bamboo meat,finally the crack turns to longitudinal and the specimen completely fractured.The critical crack tip opening displacement（COD） was obtained using the DSCM measured displacement field,and the fracture toughness of specimen was then calculated as KⅠ c=4.2 MPa·m0.5.