MD simulation of the effect of contact area and tip radius on nanoindentation

被引：20

作者：

Chen, SD ^{[1
]}

Ke, FJ

机构：

[1] Beijing Univ Aeronaut & Astronaut, Dept Appl Phys, Beijing 100083, Peoples R China

[2] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China

来源：

SCIENCE IN CHINA SERIES G-PHYSICS MECHANICS & ASTRONOMY | 2004年 / 47卷 / 01期

基金：

中国国家自然科学基金;

关键词：

nanoindentation; molecular dynamics; contact area; zero point of penetration depth; nano-hardness;

D O I：

10.1360/03yw0163

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Molecular dynamics simulations of nanoindentation are performed on monocrystal copper. A new "contact atoms" method is presented for calculating the contact area. Compared with conventional methods, this method can provide the contact area more accurately not only for sink-in but also for pile-up situation. The effect of tip radius on indentation is investigated too. The results indicate that the measured hardness of the material will become higher as the tip radius increases.

引用

页码：101 / 112

页数：12

共 18 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] Influences of pileup on the measurement of mechanical properties by load and depth sensing indentation techniques [J].

Bolshakov, A ;

Pharr, GM .

JOURNAL OF MATERIALS RESEARCH, 1998, 13 (04) :1049-1058

[3] Molecular dynamics simulation of phase transformations in silicon monocrystals due to nano-indentation [J].

Cheong, WCD ;

Zhang, LC .

NANOTECHNOLOGY, 2000, 11 (03) :173-180

[4] Atomistic modelling of nanoindentation in iron and silver [J].

Christopher, D ;

Smith, R ;

Richter, A .

NANOTECHNOLOGY, 2001, 12 (03) :372-383

[5] SEMIEMPIRICAL, QUANTUM-MECHANICAL CALCULATION OF HYDROGEN EMBRITTLEMENT IN METALS [J].

DAW, MS ;

BASKES, MI .

PHYSICAL REVIEW LETTERS, 1983, 50 (17) :1285-1288

[6]

Fischer-Cripps A.C., 2002, MECH ENG S

[7]

FOILES SM, 1986, PHYS REV B, V33, P7983, DOI 10.1103/PhysRevB.33.7983

[8] Molecular dynamics studies of plastic deformation during silicon nanoindentation [J].

Gannepalli, A ;

Mallapragada, SK .

NANOTECHNOLOGY, 2001, 12 (03) :250-257

[9]

Hockney R.W., 1970, METHOD COMPUT PHYS, V9, P136, DOI DOI 10.1021/JP805458P

[10]

*ISO FDIS, 1457712002E ISOFDIS

← 1 2 →