毛竹的冲击韧性及冲击试样断口形貌  

Fracture Pattern and Toughness of Maso Bamboo

作　　者：莫弦丰[1] 关明杰[1] 朱一辛[1] 莫翠招[1] 

机构地区：[1]南京林业大学竹材工程研究中心,南京210037

出　　处：《林业科技开发》2010年第1期45-47,共3页China Forestry Science and Technology

基　　金：江苏省国际科技合作项目"木质复合材料形变专家系统的合作研发"(编号:BZ2007074)

摘　　要：对毛竹的冲击韧性进行了测试并对冲击断口形貌进行了宏观观察。结果表明：依据JG／T199-2007《建筑用竹材物理力学性能试验方法》测试的毛竹冲击韧性值在101—126kJ／m^2范围内，毛竹的冲击韧性随着竹龄的增加有增大的趋势，10年生毛竹的冲击韧性达到最大。毛竹稍部的冲击韧性大于中部和基部，中部和基部的冲击韧性基本一致。冲击试件的断口形貌主要有双边开裂、单边开裂、凸形断口和较平整断口4大类，其中双边开裂试件的冲击韧性值小于单边开裂试件。The toughness of maso bamboo and its fracture pattern were studied by the macroscopic observation. The results showed that according to JG/T199-2007 ＂test method of physical and mechanical property for bamboo used in architecture＂, the toughness of bamboo ranged from 101 kJ/m^2 to 126 kJ/m^2, the toughness increases with bamboo age and the max data appeared in the 10 years old bamboo. The toughness in the top position of bamboo was larger than that of middle and basal potion, while the toughness was almost the same in the middle and base. The main fracture pattern of toughness test were： two-edge fracture, one-edge fracture, convex fracture and leveled fracture. The toughness values of two-edge fracture test specimens are less than that of one-edge fracture.

关 键 词：毛竹 冲击韧性 断口形貌 

分 类 号：TS653.5[轻工技术与工程] TG115.56[金属学及工艺—物理冶金]