Molecular dynamics simulations of DFZ

被引：0

作者：

Zhou, GH ^{[1
]}

Lu, H

Wan, FR

Chu, WY

Zhou, FX

机构：

[1] Univ Sci & Technol Beijing, Dept Mat Phys, Beijing 100083, Peoples R China

[2] Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China

来源：

ACTA MECHANICA SINICA | 1997年 / 13卷 / 04期

关键词：

copper; molecular dynamics simulation; DFZ;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Dislocation emission from the crack tip in copper under mode II loading is simulated with molecular dynamics method. After 26 partial dislocations are emitted and then relaxed to reach the equilibrium under the constant displacement, the double pile-ups (including an inverse pile-up and a pile-up) are formed. i.e., the first dislocation is piled up before the obstruction, and the last dislocation is piled up ahead of the crack tip. These results conform to the TEM observations.

引用

页码：377 / 382

页数：6

共 13 条

[1] SIMPLE N-BODY POTENTIALS FOR THE NOBLE-METALS AND NICKEL [J].

ACKLAND, GJ ;

TICHY, G ;

VITEK, V ;

FINNIS, MW .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1987, 56 (06) :735-756

[2]

BELTZ GE, 1991, MODELING THE DEFORMATION OF CRYSTALLINE SOLIDS, P457

[3] IN-SITU TEM OBSERVATIONS OF NUCLEATION AND BLUNTNESS OF NANOCRACKS IN THIN-CRYSTALS OF 310-STAINLESS-STEEL [J].

CHEN, QZ ;

CHU, WY ;

WANG, YB ;

HSIAO, CM .

ACTA METALLURGICA ET MATERIALIA, 1995, 43 (12) :4371-4376

[4] DISLOCATION-STRUCTURES AHEAD OF ADVANCING CRACKS [J].

DEWALD, DK ;

LEE, TC ;

ROBERTSON, IM ;

BIRNBAUM, HK .

SCRIPTA METALLURGICA, 1989, 23 (08) :1307-1312

[5] A SIMPLE EMPIRICAL N-BODY POTENTIAL FOR TRANSITION-METALS [J].

FINNIS, MW ;

SINCLAIR, JE .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1984, 50 (01) :45-55

[6]

Gao K.W., 1995, SCI CHINA, V38A, P1501

[7]

Heermann D.W., 1990, COMPUTER SIMULATION

[8] MOLECULAR-DYNAMICS STUDY OF CRACK PROCESSES ASSOCIATED WITH DISLOCATION NUCLEATED AT THE TIP [J].

KITAGAWA, H ;

NAKATANI, A ;

SHIBUTANI, Y .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1994, 176 (1-2) :263-269

[9] COMPUTER-SIMULATION OF FRACTURE USING LONG-RANGE PAIR POTENTIALS [J].

MULLINS, M .

ACTA METALLURGICA, 1984, 32 (03) :381-388

[10] AN ELECTRON-MICROSCOPE STUDY OF CRACK TIP DEFORMATION AND ITS IMPACT ON THE DISLOCATION THEORY OF FRACTURE [J].

OHR, SM .

MATERIALS SCIENCE AND ENGINEERING, 1985, 72 (01) :1-35

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