1.College of Science; Northeastern University
2.Department of Mathematics and Physics; Liaoning University of Technology
3.Shenyang National Laboratory for Materials Science; Institute of Metal Research; Chinese Academy of Sciences
Cite this article:
ZHAO Xing LI Jiuhui WANG Shaoqing ZHANG Caibei. QUASICONTINUUM METHOD SIMULATION OF THE INITIAL PLASTIC DEFORMATION OF SINGLE CRYSTAL Cu IN NANOINDENTATION. Acta Metall Sin, 2008, 44(12): 1455-1460.
The processes of initial plastic deformation of single crystal Cu in nanoindentation are simulated by using quasicontinuum method. The indenters with three different widths are used and the corresponding curves of load-displacement are analyzed to determine the critical loads of dislocation emission, which are basically in agreement with the loads predicted from energy point of view. The mechanical and microstructural characteristics of dislocation nucleation are revealed by analyzing the displacement field beneath the indenters. The general regularity of the increase of geometrically necessary dislocations beneath the indenter is presented. The motions and annihilations of dislocations in the unloading are discussed qualitatively.
[1]Li Q K,Zhang Y,Chu W Y.Acta Metall Sin,2004;40: 1238 (李启楷，张跃，褚武扬．金属学报，2004；40：1238) [2]Huo D H,Liang Y C,Cheng K,Dong S.Chin J Mech Eng, 2004;40(6):39 (霍德鸿，梁迎春，程凯．董申．机械工程学报，2004；40(6)：39) [3]Tsuru T,Shibutani Y.Modelling Simul Mater Sci Eng, 2006;14:S55 [4]Yu H L,Adams J B,Jr Louis G H.Modelling Simul Mater Sci Eng,2002;10:319 [5]Tadmor E B,Miller R,Phillips R,Ortiz M.J Mater Res, 1999;14:2233 [6]Shenoy V B,Miller R,Tadmor E B.J Mech Phys Solids. 2000;48:649 [7]Ni Y S,Wang H T.Chin J Mech Eng,2007;43(8):101 (倪玉山，王华滔．机械工程学报，2007；43(8)：101) [8]Qin Z H,Wang H T,Ni Y S.Chin Quarterly Mech,2007; 28:46 (秦昭栋，王华滔，倪玉山．力学季刊，2007；28：46) [9]Zeng F L,Sun Y.Acta Mech Solida Sin,2006;27:341 (曾凡林，孙毅．固体力学学报，2006；27：341) [10]Shan D B,Lin Y,Guo B.Mater Sci Eng,2005;A412:264 [11]Tadmor E B,Oritz M,Phillips R.Philos Mag,1996;73A: 1529 [12]Tadmor E B,Phillips R,Oritz M.Langmuir,1996;12: 4529 [13]Shenoy V B,Miller R,Tadmor E B,Phillips R,Ortiz M. Phys Rev Lett,1998;80:742 [14]Shenoy V B,Miller R,Tadmor E B,Rodney D,Phillips R,Oritz M.J Mech Phys Solids,1999;47:611 [15]Miller R E,Tadmor E B.J Computer-Aided Mater Des, 2002;9:203 [16]Foiles S M,Baskes M I,Daw M S.Phys Rev,1986;33B: 7983 [17]Voter A F.Intermetallic Compounds:Principles,vol.1. New York:John Wiley and Sons Ltd,1994:77 [18]Francois D,Pineau A,Zaoui A.Comportement Mecanique des Materiux(Elaseicite et Plasticite).3rd ed,Paris:Her- mes,1995:189
