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Mechanical response of single-crystal copper under vibration excitation based on molecular dynamics simulation
- Source :
- Journal of Manufacturing Processes; March 2022, Vol. 75 Issue: 1 p605-616, 12p
- Publication Year :
- 2022
-
Abstract
- Since high-frequency vibration is usually used to assist metal processing in improving processing efficiency and quality. An in-depth understanding of the strengthening mechanism of high-frequency vibration-assisted metal processing is essential. In this paper, molecular dynamics (MD) simulation is performed for scratching under different vibration-assisted conditions, non-vibration-assisted, one-dimensional vibration-assisted, and two-dimensional vibration-assisted, to investigate the effect of high-frequency vibration on the scratching process of single-crystal copper at the atomic scale. Based on crystal defect analysis technology and dislocation theory, the influence mechanism of high-frequency vibration on the surface morphology, tangential force change, potential energy change, and dislocation defect structure evolution of single-crystal copper is studied. By analyzing the MD results, it is found that vibration-assisted scratching significantly improved the surface quality of single-crystal copper and reduced the tangential force of spherical diamond and that two-dimensional vibration-assisted scratching has the best effect. Vibration-assisted scratching experiments are also conducted to compare the experimental results with the molecular dynamics simulation results to verify the accuracy and credibility of the molecular dynamics simulation.
Details
- Language :
- English
- ISSN :
- 15266125
- Volume :
- 75
- Issue :
- 1
- Database :
- Supplemental Index
- Journal :
- Journal of Manufacturing Processes
- Publication Type :
- Periodical
- Accession number :
- ejs58737009
- Full Text :
- https://doi.org/10.1016/j.jmapro.2021.11.066