Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature

doi:10.1016/j.msea.2020.139644

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature
	Cao, Hui 1,2; Rui, Zhiyuan 1; Yang, Fuqian 2
刊名	Materials Science and Engineering A
	2020-07-22
卷号	791
关键词	Elastic moduli Molecular dynamics Nanowires Bulk materials Cross sectional area Embedded atom potentials Molecular dynamics simulations Semi-empirical Square cross section Stress decrease Temperature range
ISSN号	09215093
DOI	10.1016/j.msea.2020.139644
英文摘要	Nanostructured materials likely exhibit different mechanical properties from the corresponding bulk materials and have potential applications in a variety of areas. In this work, we use molecular dynamics simulation with embedded-atom potential to investigate the dependence of the mechanical properties of Cu nanowires of square cross-section, including Young's modulus, yield stress and surface force, on cross-sectional area and temperature for the Cu nanowires with cross-sectional areas in a range of 13.1 to 117.6 nm2 in a temperature range of 100 to 500 K. The simulation results reveal that the Young's modulus increases with the increase of the cross-sectional area at the same temperature and decreases with the increase of temperature for the same cross-sectional area. The yield stress decreases with the increase of the cross-sectional area at the same temperature in the range of 100 to 400 K and increases with the increase of the cross-sectional area at 500 K, while it decreases with the increase of temperature for the same cross-sectional area. The surface force decreases with the increase of the cross-sectional area at the same temperature and with the increase of temperature for the same cross-sectional area. Semi-empirical expressions relating the mechanical properties to temperature are proposed. Using the semi-empirical expressions, the Young's modulus at 0 K is found to decrease with the decrease of the cross-sectional area, and the yield stress at 0 K is found to decrease linearly with the increase of the cross-sectional area. © 2020 Elsevier B.V.
语种	英语
出版者	Elsevier Ltd
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115232]
专题	土木工程学院兰州理工大学
作者单位	1.School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington; 40513, United States
推荐引用方式 GB/T 7714	Cao, Hui,Rui, Zhiyuan,Yang, Fuqian. Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature[J]. Materials Science and Engineering A,2020,791.
APA	Cao, Hui,Rui, Zhiyuan,&Yang, Fuqian.(2020).Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature.Materials Science and Engineering A,791.
MLA	Cao, Hui,et al."Mechanical properties of Cu nanowires: Effects of cross-sectional area and temperature".Materials Science and Engineering A 791(2020).