Observation of Crack Growth Behavior of Various Cracks in 4.762mm Diameter Silicon Nitride Balls under Cyclic Compressive Load
Observation of Crack Growth Behavior of Various Cracks in 4.762mm Diameter Silicon Nitride Balls under Cyclic Compressive Load
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循环压缩载荷作用下直径4.762mm氮化硅球各种裂纹裂纹扩展行为观察
DOI：
10.4028/www.scientific.net/msf.971.101
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
K. Kida
中科院分区：
文献类型：
--
作者：
Takumi Toriki;T. Matsui;K. Kida
为了研究预制裂纹长度对氮化硅球在循环压力载荷作用下强度的影响，比较了600~700μm预制裂纹、200μm~300μm预制裂纹和400~500μm预制裂纹的扩展行为。此外，还讨论了最大应力强度因子初始门槛值的变化。结果表明，在N=0和N=1000时，应力强度因子的增大率区分了失效和非失效，预裂纹长对应力强度因子增大率的门槛有很大影响。
In order to investigate the effect of pre-crack lengths on strength of silicon nitride balls under cyclic pressure loads, growth behavior of 600~700μm pre-cracks were compared to those of 200μm~300μm and 400~500μm pre-cracks. Furthermore, the change in initial threshold limit of the maximum stress intensity factor was discussed. It was found that the increasing ratio of stress intensity factor during N=0 and N=1000 distinguished the failure and non-failure, and pre-crack length had strong effect on the threshold limits of the increasing ratio.