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采用分子动力学模拟方法, 研究了金纳米管沿不同晶向拉伸与压缩载荷下的力学性能, 并分析了金纳米管的半径对其力学行为的影响. 在模拟计算中, 采用镶嵌原子势描述金原子之间的相互作用. 模拟结果表明, 在拉伸及压缩过程中, 不同晶向的金纳米管力学性能相差较大, 在拉伸和压缩载荷下金纳米管向的屈服强度最大; 在三个晶向, , 的金纳米管中, 晶向的金纳米管其屈服强度和杨氏模量都远远小于其他晶向. 研究结果还发现, 当纳米管的半径小于3.0 nm时, 金纳米管的屈服强度没有大的变化, 而当半径大于3.0 nm后, 随着半径的增大, 其屈服强度明显降低.The tensile and compressive mechanical properties of gold nanotubes in different crystal orientations as well as the tensile mechanical properties of the same thinkness of gold nanotubes at different radius. are investigated using the molecular dynamics simulation method. In the simulation, we select embedded atom method as the interatomic potential function. The result shows that mechanical properties in the tensile and compressive process in different crystallographic orientations are dramatically different from each other, where the yield strength of the direction is the highest and the yield strength and the Young's modulus in the direction are less than in the and crystal orientation. The yield strength has no major changes when the radius is less than 3.0 nm, but it obviously decreases with the increase of the radius when the radius is larger than 3.0 nm.
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Keywords:
- molecular dynamics /
- gold nanotubes /
- mechanical property
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[1] Liu Y L, Gui L J, Jin S 2012 Chin. Phys. B 21 096102
[2] Zhou G R, Teng X Y, Wang Y, Geng H R, Hur B Y 2012 Acta Phys. Sin. 61 066101 (in Chinese) [周国荣, 滕新营, 王艳, 耿浩然, 许甫宁 2012 61 066101]
[3] Lu L, Chen X, Huang X, Lu K 2009 Science 323 607
[4] McFadden S X, Mishra R S, Valiev R Z, Zhilyaev A P, Mukherjee A K 1999 Nature 398 684
[5] Zhang X, Wang H, Scattergood R O, Narayan J, Koch C C, Sergueeva A V, Mukherjee A K 2002 Appl. Phys. Lett. 81 823
[6] Wang Y M, Chen M W, Zhou F H, Ma E 2002 Nature 419 912
[7] Jia M, Lai Y Q, Tian Z L, Liu Y X 2009 Acta Phys. Sin. 58 1139 (in Chinese) [贾明, 赖延清, 田忠良, 刘业翔 2009 58 1139]
[8] Wang J M, Hu W Y, Li X F, Xiao S F, Deng H Q 2010 Comput. Mater. Sci. 50 373
[9] He A M, Shao J L, Wang P, Qin C S 2010 Acta Phys. Sin. 59 8836 (in Chinese) [何安民, 邵建立, 王裴, 秦承森 2010 59 8836]
[10] Wang G H, Pan H, Ke F J, Xia M F, Bai Y L 2008 Chin. Phys. B 17 259
[11] Huang D, Zhang Q, Qiao P Z 2011 Comput. Mater. Sci. 50 903
[12] Wang Z G, Wu L, Zhang Y, Wen Y H 2011 Acta Phys. Sin. 60 096105 (in Chinese) [汪志刚, 吴亮, 张杨, 文玉华2011 60 096105]
[13] Pastor-Abia L, Caturla M J, SanFabian E, Chiappe G, Louis E 2011 Phys. Rev. B 83 165441
[14] An M R, Song H Y, Su J F 2012 Chin. Phys. B 21 106202
[15] Song H Y, Li Y L 2012 Acta Phys. Sin. 61 226201 (in Chinese) [宋海洋, 李玉龙 2012 61 226201]
[16] Song H Y, Li Y L 2012 J. Appl. Phys. 112 054322
[17] Ao B Y, Xia J X, Chen P H, Hu W Y, Wang X L 2012 Chin. Phys. B 21 026103
[18] Liu Y H, Gao Y J, Wang F Y, Zhu T M, Zhao J W 2011 Acta Phys. Chim. Sin. 27 1341 (in Chinese) [刘云红, 高亚军, 王奋英, 朱铁民, 赵健伟 2011 物理化学学报 27 1341]
[19] Gleiter H 1995 Nanostruct. Mater. 6 3
[20] Qin Kun, Yang L M, Hu S S 2008 Chin. Phys. Lett. 25 2581
[21] Deng C, Sansoz F 2010 Phys. Rev. B 81 155430
[22] Siegel R W 1996 Mater. Sci. Forum. 235-238 851
[23] Sanders P G, Youngdahl C J, Weertman J R 1997 Mater. Sci. Eng. A 234-236 77
[24] Koch C C, Malow T R 1999 Mater. Sci. Forum. 312-314 565
[25] Honeycutt R W 1970 Methods Comput. Phys. 9 136
[26] Li R, Hu Y Z, Wang H, Zhang Y J 2008 Chin. Phys. B 17 4253
[27] Song H Y, Zha X W 2009 J. Phys. D: Appl. Phys. 42 225402
[28] Song H Y, Zha X W 2009 Phys. Lett. A 373 682
[29] Yang G M, Xu G L, Li Y T, Xu F, Chang Y B, Yang Y H 2010 Mater. Rev. 24 81 (in Chinese) [杨光明, 徐国良, 李月婷, 徐凤, 常艳兵, 杨云慧2010材料导报 24 81]
[30] Yang J H, Li B, Zhang Q J, Chen L 2012 Phys. Lett. A 376 2707
[31] Zhang J, Wang C Y, Chowdhury R, Adhikari S 2012 Appl. Phys. Lett. 101 093109
[32] Stukowski A 2010 Modelling Simul. Mater. Sci. Eng. 18 015012
[33] Faken D, Jonsson H 1994 Comput. Mater. Sci. 2 279
[34] Coura P Z, Legoas S B, Moreira A S, Sato F, Rodrigues V, Dantas S O, Ugarte D, Galvao D S 2004 Nano Lett. 4 1187
[35] Horstermeyer M F, Baskes M I 1999 J. Eng. Mater. Technol. 121 114
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