Volume 120, Number 5, December 2017
|Number of page(s)||4|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||20 February 2018|
A molecular-dynamics study of the tensile deformation and fracture behavior of nanostructured lithium aluminum oxide
College of Optoelectronic Technology, Chengdu University of Information Technology - Chengdu 610225, China
Received: 30 September 2017
Accepted: 30 January 2018
Three-dimensional nanocrystalline models of LiAlO2 with the log-normal grain size distribution are constructed with constrained Voronoi tessellation. First, the relaxation procedure of nanostructured LiAlO2 is carried out using molecular dynamics. The results suggest a reduction in the atomic densities after the relaxation process. Next, the tensile deformation and fracture behavior of nanostructured LiAlO2 are studied by using the optimized model. By researching the tensile deformation and fracture behavior of nanostructured LiAlO2, we find some interesting results: on the one hand, the greater the average grain size of the sample is, the stronger its tensile strength. On the other hand, after the strain reaches approximately 3% of the deformation of the sample, the stress of the sample does not change with the increase of the strain, displaying a plastic flow of the plastic material.
PACS: 62.25.-g – Mechanical properties of nanoscale systems
© EPLA, 2018
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