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	Study on the mechanical behavior of nano components via MD simulation
	Nan Fang ; Gaining Fang
	2010-05-07 ; 2010-05-07
关键词	Theoretical or Mathematical/ copper dislocations elasticity molecular dynamics method nanostructured materials plastic flow stress relaxation tensile strength/ nanocomponents MD simulation molecular dynamics macrostress atomic stress mechanical properties nanorod relaxation state tensile state compress state surface effect tensile strength dislocation flow stress nanohole effect Cu/ A8140L Deformation, plasticity and creep A8140J Elasticity and anelasticity A6220F Deformation and plasticity A6220D Elasticity, elastic constants A6170G Dislocations: theory/ Cu/el
中文摘要	In this article, based on the method of molecular dynamics, the mechanics response of nano-component is simulated. Some details of MD technique have been included in this paper, dealing with time step, algorithm and other problems. According to the work of predecessors, systemically a general form of atomic stress under atomic scale, as well as its specific form using EAM method, is derived. Unlike the macro stress, the atomic stress stands for the atom's potential ability of movement, and should be defined again. The mechanical properties of copper nano-rod are studied, including relaxation state, tensile state and compress state. Because of the high energy atoms on the surface, the surface effect is generated. So when in relaxation state, the nano-rod will be shortened, and the more atoms the rod has, the less is shortened. When the strain is between -0.1 and 0.1, the nano-rod performs elastic situation. The nano-rod has a highly tensile strength. We find that dislocation can reduced the flow stress of the nano-rod. Finally the effect of nano-hole effect is discussed.
语种	英语 ; 英语
出版者	Trans Tech Publications ; Switzerland
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/16004]
专题	清华大学
推荐引用方式 GB/T 7714	Nan Fang,Gaining Fang. Study on the mechanical behavior of nano components via MD simulation[J],2010, 2010.
APA	Nan Fang,&Gaining Fang.(2010).Study on the mechanical behavior of nano components via MD simulation..
MLA	Nan Fang,et al."Study on the mechanical behavior of nano components via MD simulation".(2010).

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