Influences of nanotwin volume fraction on the ballistic performance of coarse-grained metals

Q. D. Ouyang; G. J. Weng; A. K. Soh; X. Guo

doi:10.1016/j.taml.2017.09.012

Influences of nanotwin volume fraction on the ballistic performance of coarse-grained metals

Q. D. Ouyang, G. J. Weng, A. K. Soh, X. Guo

School of Engineering, Mechanical & Aerospace Engineering

Research output: Contribution to journal › Letter › peer-review

3 Scopus citations

Abstract

Coarse-grained (CG) metals strengthened by nanotwinned (NT) regions possess high strength and good ductility. As such, they are very suitable for applications in bullet-proof targets. Here, a numerical model based on the conventional theory of strain gradient plasticity and the Johnson–Cook failure criterion is employed to study the influences of volume fraction of NT regions on their ballistic performance. The results show that in general a relatively small twin spacing (4–10 nm) and a moderate volume fraction (7%–20%) will lead to excellent limit velocity and that the influences of volume fraction on limit displacement change with the category of impact processes.

Original language	English (US)
Pages (from-to)	265-268
Number of pages	4
Journal	Theoretical and Applied Mechanics Letters
Volume	7
Issue number	5
DOIs	https://doi.org/10.1016/j.taml.2017.09.012
State	Published - Sep 2017

All Science Journal Classification (ASJC) codes

Computational Mechanics
Environmental Engineering
Civil and Structural Engineering
Biomedical Engineering
Aerospace Engineering
Ocean Engineering
Mechanics of Materials
Mechanical Engineering

Keywords

Ballistic performance
Limit displacement
Limit velocity
Nanotwin
Volume fraction

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10.1016/j.taml.2017.09.012

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title = "Influences of nanotwin volume fraction on the ballistic performance of coarse-grained metals",

abstract = "Coarse-grained (CG) metals strengthened by nanotwinned (NT) regions possess high strength and good ductility. As such, they are very suitable for applications in bullet-proof targets. Here, a numerical model based on the conventional theory of strain gradient plasticity and the Johnson–Cook failure criterion is employed to study the influences of volume fraction of NT regions on their ballistic performance. The results show that in general a relatively small twin spacing (4–10 nm) and a moderate volume fraction (7%–20%) will lead to excellent limit velocity and that the influences of volume fraction on limit displacement change with the category of impact processes.",

keywords = "Ballistic performance, Limit displacement, Limit velocity, Nanotwin, Volume fraction",

author = "Ouyang, {Q. D.} and Weng, {G. J.} and Soh, {A. K.} and X. Guo",

note = "Funding Information: We wish to thank anonymous reviewers for their helpful comments. This research is supported by the National Natural Science Foundation of China ( 11372214 ) and the opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) ( KFJJ17-10M ). Weng thanks the support of the NSF Mechanics of Materials Program under CMMI-1162431 . Soh acknowledges the support from the Advanced Engineering Programme and School of Engineering, Monash University Malaysia. Publisher Copyright: {\textcopyright} 2017 The Authors",

year = "2017",

month = sep,

doi = "10.1016/j.taml.2017.09.012",

language = "English (US)",

volume = "7",

pages = "265--268",

journal = "Theoretical and Applied Mechanics Letters",

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TY - JOUR

T1 - Influences of nanotwin volume fraction on the ballistic performance of coarse-grained metals

AU - Ouyang, Q. D.

AU - Weng, G. J.

AU - Soh, A. K.

AU - Guo, X.

N1 - Funding Information: We wish to thank anonymous reviewers for their helpful comments. This research is supported by the National Natural Science Foundation of China ( 11372214 ) and the opening project of State Key Laboratory of Explosion Science and Technology (Beijing Institute of Technology) ( KFJJ17-10M ). Weng thanks the support of the NSF Mechanics of Materials Program under CMMI-1162431 . Soh acknowledges the support from the Advanced Engineering Programme and School of Engineering, Monash University Malaysia. Publisher Copyright: © 2017 The Authors

PY - 2017/9

Y1 - 2017/9

N2 - Coarse-grained (CG) metals strengthened by nanotwinned (NT) regions possess high strength and good ductility. As such, they are very suitable for applications in bullet-proof targets. Here, a numerical model based on the conventional theory of strain gradient plasticity and the Johnson–Cook failure criterion is employed to study the influences of volume fraction of NT regions on their ballistic performance. The results show that in general a relatively small twin spacing (4–10 nm) and a moderate volume fraction (7%–20%) will lead to excellent limit velocity and that the influences of volume fraction on limit displacement change with the category of impact processes.

AB - Coarse-grained (CG) metals strengthened by nanotwinned (NT) regions possess high strength and good ductility. As such, they are very suitable for applications in bullet-proof targets. Here, a numerical model based on the conventional theory of strain gradient plasticity and the Johnson–Cook failure criterion is employed to study the influences of volume fraction of NT regions on their ballistic performance. The results show that in general a relatively small twin spacing (4–10 nm) and a moderate volume fraction (7%–20%) will lead to excellent limit velocity and that the influences of volume fraction on limit displacement change with the category of impact processes.

KW - Ballistic performance

KW - Limit displacement

KW - Limit velocity

KW - Nanotwin

KW - Volume fraction

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DO - 10.1016/j.taml.2017.09.012

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SN - 2095-0349

VL - 7

SP - 265

EP - 268

JO - Theoretical and Applied Mechanics Letters

JF - Theoretical and Applied Mechanics Letters

IS - 5

ER -

Influences of nanotwin volume fraction on the ballistic performance of coarse-grained metals

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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