Growth of pore interfaces and roughness of fracture surfaces in porous silica: Million particle molecular-dynamics simulations

Journal Article · Mon Oct 24 00:00:00 EDT 1994 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.73.2336· OSTI ID:6841679

Nakano, A; Kalia, R K; Vashishta, P ^[1]

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1. Concurrent Computing Laboratory for Materials Simulations, Department of Physics and Astronomy, Department of Computer Science, Louisiana State University, Baton Rouge, Louisiana 70803 (United States)

Pore interface growth and the roughness of fracture surfaces in silica glasses have been investigated with large-scale molecular-dynamics simulations. During uniform dilation, the average pore radius [ital R] and the width [ital W] scale with the pore size [ital s] as [ital R][similar to][ital s][sup [eta]] and [ital W][similar to][ital s][sup [mu]] with [eta]=0.48[plus minus]0.03 and [mu]=0.50[plus minus]0.03. When the mass density is reduced to 1.4 g/cm[sup 3], the pores grow catastrophically to cause fracture. The roughness exponent for fracture surfaces, [alpha]=0.87[plus minus]0.02, supports experimental claims about the universality of [alpha].

• DOE Contract Number: FG05-92ER45477
• OSTI ID: 6841679
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 73:17; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
CHALCOGENIDES
COMPUTERIZED SIMULATION
FRACTURE PROPERTIES
GROWTH
INTERFACES
MATERIALS
MECHANICAL PROPERTIES
MINERALS
MORPHOLOGY
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
POROSITY
POROUS MATERIALS
ROUGHNESS
SCALING LAWS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SIMULATION
SURFACE PROPERTIES