Threshold crack speed controls dynamical fracture of silicon single crystals.

Threshold crack speed controls dynamical fracture of silicon single crystals. Research Abstract Details 

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Threshold crack speed controls dynamical fracture of silicon single crystals. Abstract Text:

Markus J Buehler,Harvey Tang,Adri C T van Duin,William A Goddard,Markus J Buehler,Harvey Tang,Adri C T van Duin,William A Goddard,Markus J Buehler,Harvey Tang,Adri C T van Duin,William A Goddard,

Fracture experiments of single silicon crystals reveal that after the critical fracture load is reached, the crack speed jumps from zero to approximately 2 km/sec, indicating that crack motion at lower speeds is forbidden. This contradicts classical continuum fracture theories predicting a continuously increasing crack speed with increasing load. Here we show that this threshold crack speed may be due to a localized phase transformation of the silicon lattice from 6-membered rings to a 5-7 double ring at the crack tip.

Threshold crack speed controls dynamical fracture of silicon single crystals. Publishing Authors By Initials

MJ Buehler,H Tang,AC van Duin,WA Goddard,MJ Buehler,H Tang,AC van Duin,WA Goddard,MJ Buehler,H Tang,AC van Duin,WA Goddard,

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Threshold crack speed controls dynamical fracture of silicon single crystals. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Physical review letters

VOLUME: 99

Page Numbers: 165502

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ISSN: 0031-9007

DAY: 18

MONTH: 10

YEAR: 2007

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LANGUAGE: eng

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AFFILIATION: Laboratory for Atomistic and Molecular Mechanics, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Room 1-272, Cambridge, Massachusetts 02139, USA.

Country: United States

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MEDLINETA: Phys Rev Lett

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