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Left-right loading dependence of shock response of (111)//(112) Cu bicrystals: Deformation and spallation

An, Q. and Han, W. Z. and Luo, S. N. and Germann, T. C. and Tonks, D. L. and Goddard, William A., III (2012) Left-right loading dependence of shock response of (111)//(112) Cu bicrystals: Deformation and spallation. Journal of Applied Physics, 111 (5). Art. No. 053525 . ISSN 0021-8979.

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We investigate with molecular dynamics the dynamic response of Cu bicrystals with a special asymmetric grain boundary (GB), (111)//(112)〈110〉, and its dependence on the loading directions. Shock loading is applied along the GB normal either from the left or right to the GB. Due to the structure asymmetry, the bicrystals demonstrate overall strong left-right loading dependence of its shock response, including compression wave features, compression and tensile plasticity, damage characteristics (e.g., spall strength), effective wave speeds and structure changes, except that spallation remains dominated by the GB damage regardless of the loading directions. The presence or absence of transient microtwinning also depends on the loading directions.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
An, Q.0000-0003-4838-6232
Goddard, William A., III0000-0003-0097-5716
Additional Information:© 2012 American Institute of Physics. Received 26 August 2011; accepted 7 February 2012; published online 8 March 2012. This work was supported by the Advanced Simulation and Computation, and Laboratory-Directed Research and Development programs at LANL, and the PSAAP program at Caltech. LANL is operated by Los Alamos National Security, LLC for the U.S. Department of Energy under Contract No. DE-AC52-06NA25396.
Funding AgencyGrant Number
Los Alamos National LaboratoryUNSPECIFIED
Department of Energy (DOE)DE-AC52-06NA25396
Subject Keywords:bicrystals, compressive strength, copper, grain boundaries, molecular dynamics method, plastic deformation, plasticity, shock waves, tensile strength, twinning
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Other Numbering System NameOther Numbering System ID
Issue or Number:5
Classification Code:PACS: 62.50.Ef; 68.35.Ct; 68.35.Gy; 61.72.Mm; 81.40.Lm; 62.20.fq
Record Number:CaltechAUTHORS:20120427-130530361
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:30375
Deposited By: Tony Diaz
Deposited On:30 Apr 2012 17:18
Last Modified:03 Oct 2019 03:49

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