Interaction of voids and nanoductility in silica glass

被引：64

作者：

Chen, Yi-Chun ^{[1
]}

Lu, Zhen ^{[1
]}

Nomura, Ken-Ichi ^{[1
]}

Wang, Weiqiang ^{[1
]}

Kalia, Rajiv K. ^{[1
]}

Nakano, Aiichiro ^{[1
]}

Vashishta, Priya ^{[1
]}

机构：

[1] Univ So Calif, Collaboratory Adv Comp & Simulat, Los Angeles, CA 90089 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.99.155506

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Multimillion-to-billion-atom molecular dynamics simulations are performed to investigate the interaction of voids in silica glass under hydrostatic tension. Nanometer size cavities nucleate in intervoid ligaments as a result of the expansion of Si-O rings due to a bond-switching mechanism, which involves bond breaking between Si-O and bond formation between that Si and a nonbridging O. With further increase in strain, nanocracks form on void surfaces and ligaments fracture through the growth and coalescence of ligament nanocavities in a manner similar to that observed in ductile metallic alloys.

引用

页数：4

共 35 条

[1] Spanning the continuum to quantum length scales in a dynamic simulation of brittle fracture [J].

Abraham, FF ;

Broughton, JQ ;

Bernstein, N ;

Kaxiras, E .

EUROPHYSICS LETTERS, 1998, 44 (06) :783-787

[2]

Allen M. P., 2009, Computer Simulation of Liquids

[3] CAVITY FORMATION FROM INCLUSIONS IN DUCTILE FRACTURE [J].

ARGON, AS ;

IM, J ;

SAFOGLU, R .

METALLURGICAL TRANSACTIONS, 1975, A 6 (04) :825-837

[4] CAVITY FORMATION FROM INCLUSIONS IN DUCTILE FRACTURE OF A508-STEEL [J].

Beremin, FM .

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1981, 12 (05) :723-731

[5] Experimental investigation of damage and fracture in glassy materials at the nanometre scale [J].

Bonamy, D ;

Prades, S ;

Ponson, L ;

Dalmas, D ;

Rountree, CL ;

Bouchaud, E ;

Guillot, C .

INTERNATIONAL JOURNAL OF MATERIALS & PRODUCT TECHNOLOGY, 2006, 26 (3-4) :339-353

[6] The morphology of fracture surfaces: A tool for understanding crack propagation in complex materials [J].

Bouchaud, E .

SURFACE REVIEW AND LETTERS, 2003, 10 (05) :797-814

[7]

Brown L.M., 1973, 3RD P INT C STRENGTH, P164

[8]

BUDIANSKI BJ, 1982, MECH SOLIDS RODNEY H

[9] Glass breaks like metal, but at the nanometer scale -: art. no. 075504 [J].

Célarié, F ;

Prades, S ;

Bonamy, D ;

Ferrero, L ;

Bouchaud, E ;

Guillot, C ;

Marlière, C .

PHYSICAL REVIEW LETTERS, 2003, 90 (07) :4

[10] INTERGRANULAR FRACTURE DURING POWER-LAW CREEP UNDER MULTIAXIAL STRESSES [J].

COCKS, ACF ;

ASHBY, MF .

METAL SCIENCE, 1980, 14 (8-9) :395-402

← 1 2 3 4 →