Abstract
In current work, we perform molecular dynamics simulations to investigate the effect of machining velocity on the nanoscratching of amorphous polystyrene. In particular, the deformation mechanisms of the material are analyzed and are related to its frictional response. Simulation results reveal that inter-chain sliding and intra-chain change are two competing deformation mechanisms governing the permanent deformation of polystyrene specimen. Furthermore, quantitative characterization of dihedral angle evolution indicates that intra-chain change is more energetically stable than inter-chain sliding. It is found that the deformation behavior of polystyrene specimen under nanoscratching strongly depends on machining velocity, which subsequently affects scratching results.
Keywords: Inter/Intra-chain interactions, machining velocity, molecular dynamics, nanoscratching, permanent deformation, polystyrene
Current Nanoscience
Title:Velocity-dependent Nanoscratching of Amorphous Polystyrene
Volume: 9 Issue: 1
Author(s): Kai Du, Yongjian Tang, Junjie Zhang, Fangda Xu, Yongda Yan and Tao Sun
Affiliation:
Keywords: Inter/Intra-chain interactions, machining velocity, molecular dynamics, nanoscratching, permanent deformation, polystyrene
Abstract: In current work, we perform molecular dynamics simulations to investigate the effect of machining velocity on the nanoscratching of amorphous polystyrene. In particular, the deformation mechanisms of the material are analyzed and are related to its frictional response. Simulation results reveal that inter-chain sliding and intra-chain change are two competing deformation mechanisms governing the permanent deformation of polystyrene specimen. Furthermore, quantitative characterization of dihedral angle evolution indicates that intra-chain change is more energetically stable than inter-chain sliding. It is found that the deformation behavior of polystyrene specimen under nanoscratching strongly depends on machining velocity, which subsequently affects scratching results.
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Cite this article as:
Du Kai, Tang Yongjian, Zhang Junjie, Xu Fangda, Yan Yongda and Sun Tao, Velocity-dependent Nanoscratching of Amorphous Polystyrene, Current Nanoscience 2013; 9 (1) . https://dx.doi.org/10.2174/1573413711309010026
DOI https://dx.doi.org/10.2174/1573413711309010026 |
Print ISSN 1573-4137 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6786 |
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