On the erosion process on quartz crystals by the impact of multiple high-velocity micro-particles
On the erosion process on quartz crystals by the impact of multiple high-velocity micro-particles
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DOI：
10.1016/j.triboint.2015.12.003
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发表时间：
2016-03
影响因子：
6.2
通讯作者：
H. Qi;J. Fan;Jun Wang;Huaizhong Li
中科院分区：
文献类型：
--
作者：
H. Qi;J. Fan;Jun Wang;Huaizhong Li
采用离散元法建立了多个微粒子撞击石英晶体的计算模型。它示出的影响，启动中间和横向裂纹，降低强度的基板材料，并促进材料去除在随后的影响。通过裂纹扩展和相交破坏与所有相邻单元的接触，去除单元材料。两次冲击之间的较大重叠冲击条件对于第二次冲击中的材料去除更有效，但总重叠不产生最大材料去除。微裂纹的数量和厚度的腐蚀试样上留下的裂纹层的影响条件也进行了研究。
A computational model using the discrete element method is presented to investigate the impact process of multiple micro-particles on a quartz crystal. It is shown that the impacts initiate median and lateral cracks that degrade the strength of the substrate material and facilitate material removal in subsequent impacts. Elemental materials are removed through breaking their contacts with all adjacent elements by crack propagation and intersection. A larger overlapping impact condition between two impacts is more efficient for material removal in the second impact, but a total overlap does not yield the maximum material removal. The number of micro-cracks and the thickness of the cracked layer left on the eroded specimen are also studied in relation to the impact conditions.