Atomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision

The penetration process has attracted increasing attention due to its engineering and scientific value. In this work, we investigate the deformation and damage mechanism about the nanoscale penetration of single-crystal aluminum nanorod with atomistic simulations, where distinct draw ratio (<inli...

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Autores principales:	Yong-Chao Wu, Jin-Ming Liu, Wei Xie, Qing Yin, Jian-Li Shao
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	hypervelocity impact penetration aluminum molecular dynamics Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/079276fce4e74b08ab3ebbb6ae8ce74e
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spelling	oai:doaj.org-article:079276fce4e74b08ab3ebbb6ae8ce74e2021-11-25T18:32:55ZAtomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision10.3390/nano111131602079-4991https://doaj.org/article/079276fce4e74b08ab3ebbb6ae8ce74e2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/3160https://doaj.org/toc/2079-4991The penetration process has attracted increasing attention due to its engineering and scientific value. In this work, we investigate the deformation and damage mechanism about the nanoscale penetration of single-crystal aluminum nanorod with atomistic simulations, where distinct draw ratio (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mo>∅</mo></semantics></math></inline-formula>) and different incident velocities (u<sub>p</sub>) are considered. The micro deformation processes of no penetration state (within 2 km/s) and complete penetration (above 3 km/s) are both revealed. The high-speed bullet can cause high pressure and temperature at the impacted region, promoting the localized plastic deformation and even solid-liquid phase transformation. It is found that the normalized velocity of nanorod reduces approximately exponentially during penetration (u<sub>p</sub> < 3 km/s), but its residual velocity linearly increased with initial incident velocity. Moreover, the impact crater is also calculated and the corresponding radius is manifested in the linear increase trend with u<sub>p</sub> while inversely proportional to the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mo>∅</mo></semantics></math></inline-formula>. Interestingly, the uniform fragmentation is observed instead of the intact spallation, attributed to the relatively thin thickness of the target. It is additionally demonstrated that the number of fragments increases with increasing u<sub>p</sub> and its size distribution shows power law damping nearly. Our findings are expected to provide the atomic insight into the micro penetration phenomena and be helpful to further understand hypervelocity impact related domains.Yong-Chao WuJin-Ming LiuWei XieQing YinJian-Li ShaoMDPI AGarticlehypervelocity impactpenetrationaluminummolecular dynamicsChemistryQD1-999ENNanomaterials, Vol 11, Iss 3160, p 3160 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	hypervelocity impact penetration aluminum molecular dynamics Chemistry QD1-999
spellingShingle	hypervelocity impact penetration aluminum molecular dynamics Chemistry QD1-999 Yong-Chao Wu Jin-Ming Liu Wei Xie Qing Yin Jian-Li Shao Atomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision
description	The penetration process has attracted increasing attention due to its engineering and scientific value. In this work, we investigate the deformation and damage mechanism about the nanoscale penetration of single-crystal aluminum nanorod with atomistic simulations, where distinct draw ratio (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mo>∅</mo></semantics></math></inline-formula>) and different incident velocities (u<sub>p</sub>) are considered. The micro deformation processes of no penetration state (within 2 km/s) and complete penetration (above 3 km/s) are both revealed. The high-speed bullet can cause high pressure and temperature at the impacted region, promoting the localized plastic deformation and even solid-liquid phase transformation. It is found that the normalized velocity of nanorod reduces approximately exponentially during penetration (u<sub>p</sub> < 3 km/s), but its residual velocity linearly increased with initial incident velocity. Moreover, the impact crater is also calculated and the corresponding radius is manifested in the linear increase trend with u<sub>p</sub> while inversely proportional to the <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mo>∅</mo></semantics></math></inline-formula>. Interestingly, the uniform fragmentation is observed instead of the intact spallation, attributed to the relatively thin thickness of the target. It is additionally demonstrated that the number of fragments increases with increasing u<sub>p</sub> and its size distribution shows power law damping nearly. Our findings are expected to provide the atomic insight into the micro penetration phenomena and be helpful to further understand hypervelocity impact related domains.
format	article
author	Yong-Chao Wu Jin-Ming Liu Wei Xie Qing Yin Jian-Li Shao
author_facet	Yong-Chao Wu Jin-Ming Liu Wei Xie Qing Yin Jian-Li Shao
author_sort	Yong-Chao Wu
title	Atomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision
title_short	Atomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision
title_full	Atomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision
title_fullStr	Atomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision
title_full_unstemmed	Atomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision
title_sort	atomistic simulations on metal rod penetrating thin target at nanoscale caused by high-speed collision
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/079276fce4e74b08ab3ebbb6ae8ce74e
work_keys_str_mv	AT yongchaowu atomisticsimulationsonmetalrodpenetratingthintargetatnanoscalecausedbyhighspeedcollision AT jinmingliu atomisticsimulationsonmetalrodpenetratingthintargetatnanoscalecausedbyhighspeedcollision AT weixie atomisticsimulationsonmetalrodpenetratingthintargetatnanoscalecausedbyhighspeedcollision AT qingyin atomisticsimulationsonmetalrodpenetratingthintargetatnanoscalecausedbyhighspeedcollision AT jianlishao atomisticsimulationsonmetalrodpenetratingthintargetatnanoscalecausedbyhighspeedcollision
_version_	1718410996656111616

Atomistic Simulations on Metal Rod Penetrating Thin Target at Nanoscale Caused by High-Speed Collision

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