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	MPM/MD handshaking method for multiscale simulation and its application to high energy cluster impacts
	Guo, Z ; Yang, W
	2010-05-10 ; 2010-05-10
会议名称	INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES ; 7th Asia-Pacific Symposium on Advances in Engineering Plasticity and its Applications ; Shanghai, PEOPLES R CHINA ; Web of Science
关键词	multiscale simulation cluster impact MPM/MD handshaking MOLECULAR-DYNAMICS SIMULATION MATERIAL POINT METHOD IN-CELL METHOD DISLOCATION NUCLEATION COMPUTER-SIMULATION DAMAGE FORMATION SOLID MECHANICS FINITE-ELEMENT LENGTH SCALES CU Engineering, Mechanical Mechanics
中文摘要	We propose a new multiscale simulation method which seamlessly combines the conventional molecular dynamics (MD) with the continuum mechanics formulated under the material point method (MPM). In MPM, modified interpolation shape functions are adopted to reduce artificial forces on the hierarchical background grids. The multiscale method is validated using the examples of step-like wave and wave packet propagations within a bar. The method is applicable to several kinds of potentials including the Lennard-Jones, EAM and a bonding-angle related potential for silicon. Examples of high energy Cu-Cu and Si-Si cluster impacts are presented. The evolution of displaced atoms is found to depend on the underlying lattice structures. For the case of Cu-Cu cluster impacts, stacking faults play an important role. The displaced atoms, visualized in the method of "local crystalline order", propagate in an anisotropic manner. This implies the anisotropy in energy transformation process through multi-interactions among cluster and surface atoms. (c) 2005 Elsevier Ltd. All rights reserved.; Shanghai Jiaotong Univ
会议录出版者	PERGAMON-ELSEVIER SCIENCE LTD ; OXFORD ; THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19002]
专题	清华大学
推荐引用方式 GB/T 7714	Guo, Z,Yang, W. MPM/MD handshaking method for multiscale simulation and its application to high energy cluster impacts[C]. 见:INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, 7th Asia-Pacific Symposium on Advances in Engineering Plasticity and its Applications, Shanghai, PEOPLES R CHINA, Web of Science.

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