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Tensile Strength of Liquids: Equivalence of Temporal and Spatial Scales in Cavitation

Cai, Y. and Huang, J. Y. and Wu, H. A. and Zhu, M. H. and Goddard, W. A., III and Luo, S. N. (2016) Tensile Strength of Liquids: Equivalence of Temporal and Spatial Scales in Cavitation. Journal of Physical Chemistry Letters, 7 (5). pp. 806-810. ISSN 1948-7185.

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It is well known that strain rate and size effects are both important in material failure, but the relationships between them are poorly understood. To establish this connection, we carry out molecular dynamics (MD) simulations of cavitation in Lennard-Jones and Cu liquids over a very broad range of size and strain rate. These studies confirm that temporal and spatial scales play equivalent roles in the tensile strengths of these two liquids. Predictions based on smallest-scale MD simulations of Cu for larger temporal and spatial scales are consistent with independent simulations, and comparable to experiments on liquid metals. We analyze these results in terms of classical nucleation theory and show that the equivalence arises from the role of both size and strain rate in the nucleation of a daughter phase. Such equivalence is expected to hold for a wide range of materials and processes and to be useful as a predictive bridging tool in multiscale studies.

Item Type:Article
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Goddard, W. A., III0000-0003-0097-5716
Additional Information:© 2016 American Chemical Society. Received: December 16, 2015; Accepted: February 17, 2016; Published: February 17, 2016. This work is partially supported by the 973 Project (No. 2014CB845904) and NSF (No. 11472253) of China.
Funding AgencyGrant Number
973 Project2014CB845904
National Science Foundation of China11472253
Issue or Number:5
Record Number:CaltechAUTHORS:20160307-083156821
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Official Citation:Tensile Strength of Liquids: Equivalence of Temporal and Spatial Scales in Cavitation Y. Cai, J. Y. Huang, H. A. Wu, M. H. Zhu, W. A. Goddard, III, and S. N. Luo The Journal of Physical Chemistry Letters 2016 7 (5), 806-810 DOI: 10.1021/acs.jpclett.5b02798
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65097
Deposited By: Tony Diaz
Deposited On:07 Mar 2016 23:08
Last Modified:03 Oct 2019 09:44

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