Tension―compression asymmetry in nanocrystalline Cu: High strain rate vs. quasi-static deformation
作者： Avinash M. Dongare , Arunachalam M. Rajendran , Bruce LaMattina , Mohammed A. Zikry , Donald W. Brenner
DOI: 10.1016/J.COMMATSCI.2010.05.004
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摘要: Abstract Large-scale molecular dynamics (MD) simulations are used to understand the yield behavior of nanocrystalline Ni and Cu with grain sizes ⩽10 nm at high strain rates. The calculated flow stress values a rate 109 s−1 suggest an asymmetry in strength tension compression metal being stronger than tension. This tension–compression is observed decrease size up 4 nm, after which, further results increase asymmetry. effect on metals as obtained from MD discussed compared that reported literature by statics for quasi-static loading conditions.
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