Study on Subsurface Damage in Sapphire During Nano Indentation Using Molecular Dynamics Simulation

2021 ◽  
Author(s):  
Aditya Nagaraj ◽  
Sangkee Min
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Subsurface Damage ◽  
Dynamics Simulation ◽  
Nano Indentation

Nano-Indentation Simulation Study Based on Parallel Computing

2012 ◽  
Vol 500 ◽  
pp. 696-701
Author(s):  
Ying Zhu ◽  
Sen Song ◽  
Ling Ling Xie ◽  
Shun He Qi ◽  
Qian Qian Liu
Keyword(s):  
Molecular Dynamics ◽  
Parallel Computing ◽  
Molecular Dynamics Simulation ◽  
Large Scale ◽  
Dynamics Simulation ◽  
Parallel Computer ◽  
Nano Indentation ◽  
Simulation Results ◽  
The Impact ◽  
Simulation Time

This method of parallel computing into nanoindentation molecular dynamics simulation (MDS), the author uses a nine-node parallel computer and takes the single crystal aluminum as the experimental example, to implement the large-scale process simulation of nanoindentation. Compared the simulation results with experimental results is to verify the reliability of the simulation. The method improves the computational efficiency and shortens the simulation time and the expansion of scale simulation can significantly reduce the impact of boundary conditions, effectively improve the accuracy of the molecular dynamics simulation of nanoindentation.

The Simulation Research of Nano-Indentation Based on the Molecular Dynamics

2012 ◽  
Vol 500 ◽  
pp. 702-706
Author(s):  
Ying Zhu ◽  
Ling Ling Xie ◽  
Sen Song ◽  
Shun Hen Qi ◽  
Qian Qian Liu
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Large Scale ◽  
Optimization Method ◽  
Dynamics Simulation ◽  
Simulation Research ◽  
Nano Indentation ◽  
Simulation Calculation ◽  
Simulation Results ◽  
The Difference

The work in the optimization of the simulation of nanoindentation based on the molecular dynamics was mainly introduced in this paper. One optimization method, freeze atoms method was proposed according to the characteristics of nanoindentation process itself, then did the simulation calculation through the use of freeze atoms method and the traditional calculation method, It was found that the difference between simulation results and experimental results of hardness decreased gradually with enlarge the scale of molecular dynamics simulation (with increase of the indentation depth), from 32.39% of 5nm decreased to 14.6% of 25nm. By comparison, it was found that the optimized algorithm could improve the efficiency of simulation in large-scale molecular dynamics simulation., confirmed the correctness and effectiveness of freeze atoms method.

Sign in / Sign up

Export Citation Format

Share Document