Characterization of 2-dimensional crack propagation behavior by simulation and analysis

被引：45
|
作者：
Kim, BN
Wakayama, S
Kawahara, M
机构：
[1] Department of Mechanical Engineering, Tokyo Metropolitan University, Hachioji-City, Tokyo, 192-03
来源：
INTERNATIONAL JOURNAL OF FRACTURE | 1996年 / 75卷 / 03期
关键词：
D O I：
10.1007/BF00037085
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Crack propagation behavior in 2-dimensional polycrystals is simulated and analyzed as a function of the fracture toughness of the grain boundary. The path of a crack impinging on a grain boundary is determined by the competition theory between intergranular and transgranular propagation. With decreasing boundary toughness,the tendency of intergranular propagation increases and the apparent fracture toughness of the polycrystal decreases. The results of the 2-dimensional analysis are compared with the simulation, and the advantages and limitations are discussed. The grain boundary toughness is evaluated by comparing the simulated crack paths with direct observations, resulting in a reasonable value for alumina ceramics. The fracture behavior is characterized in a macro-scale by the percentage of transgranular fracture and also in a micro-scale by the distribution of crack deflection angles.
引用
收藏
页码：247 / 259
页数：13
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