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Threshold Crack Speed Controls Dynamical Fracture of Silicon Single Crystals

Buehler, Markus J. and Tang, Harvey and van Duin, Adri C. T. and Goddard, William A., III (2007) Threshold Crack Speed Controls Dynamical Fracture of Silicon Single Crystals. Physical Review Letters, 99 (16). Art. No. 165502. ISSN 0031-9007.

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Fracture experiments of single silicon crystals reveal that after the critical fracture load is reached, the crack speed jumps from zero to [approximate]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.

Item Type:Article
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URLURL TypeDescription
van Duin, Adri C. T.0000-0002-3478-4945
Goddard, William A., III0000-0003-0097-5716
Additional Information:© 2007 The American Physical Society. (Received 31 March 2007; published 18 October 2007) H.T. acknowledges support from MIT’s UROP program. Funding was provided by ARO (Grant No. W911NF-06-1-0291).
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Massachusetts Institute of Technology (MIT)UNSPECIFIED
Army Research Office (ARO)W911NF-06-1-0291
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Issue or Number:16
Record Number:CaltechAUTHORS:BUEprl07
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9015
Deposited By: Archive Administrator
Deposited On:20 Oct 2007
Last Modified:12 Dec 2019 17:07

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