Computational modeling and simulation of spall fracture in polycrystalline solids by an atomistic-based interfacial zone model.
Computational modeling and simulation of spall fracture in polycrystalline solids by an atomistic-based interfacial zone model.
复制标题
通过基于原子的界面区模型对多晶固体中溅骨断裂的计算模型和仿真。
DOI：
10.1016/j.engfracmech.2015.05.039
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发表时间：
2015-07-01
影响因子：
5.4
通讯作者：
Zeng X
中科院分区：
文献类型：
--
作者：
Lin L;Zeng X
本工作的重点是研究层裂断裂多晶材料在高速冲击载荷下，使用基于原子的界面区模型。我们说明，对于多晶材料，晶界和晶粒之间的势能比的增加可能会导致从沿晶到穿晶模式的断裂过渡。同时，层裂强度随着断裂方式的转变而增大。此外，晶粒尺寸、晶格取向和冲击速度的分析表明，层裂强度随晶粒尺寸或冲击速度的增加而增加。
The focus of this work is to investigate spall fracture in polycrystalline materials under high-speed impact loading by using an atomistic-based interfacial zone model. We illustrate that for polycrystalline materials, increases in the potential energy ratio between grain boundaries and grains could cause a fracture transition from intergranular to transgranular mode. We also found out that the spall strength increases when there is a fracture transition from intergranular to transgranular. In addition, analysis of grain size, crystal lattice orientation and impact speed reveals that the spall strength increases as grain size or impact speed increases.