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Kim, Sung Youb
Computational Advanced Nanomechanics (CAN) Lab
Research Interests
  • Computational Mechanics
  • Nanomechanics
  • Molecular Dynamics
  • FEM

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기계적 변형하에서 금속재료의 표면응력 계산

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Title
기계적 변형하에서 금속재료의 표면응력 계산
Other Titles
Calculations of Surface Stresses in Metals Under Mechanical Strains
Author
Kim, Sung YoubEarmme, Y.Y.
Keywords
FCC metal; Strain effect; Surface stress
Issue Date
2008-03
Publisher
Korean Society of Mechanical Engineers
Citation
TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS, A, v.32, no.3, pp.250 - 257
Abstract
We calculate the variation of the surface stresses according to uniaxial and biaxial strains in face-centered cubic (FCC) metals. In our study, three mainly observed free surfaces of seven representative FCC metals are considered. Employed method is molecular mechanics, in which the interaction of atoms is described by empirical interatomic potentials. As uniaxial strain increases to tensile direction, the surface stresses on {100} and {110} free surfaces decrease monotonously, while those on {111} surface increase. These tendencies are the same regardless of the species of metals and interatomic potentials employed. However, when the system is under biaxial strain, surface stresses change different according to the surface directions, the species of metals, and even interatomic potentials. On {100) and {111} surfaces, heavy metals (Pt, Au) show the opposite variation to light metals (Ni, Cu). In the cases of Pd and Ag, the surface stresses reveal the opposite tendency, depending on interatomic potentials used.
URI
https://scholarworks.unist.ac.kr/handle/201301/7373
DOI
10.3795/KSME-A.2008.32.3.250
ISSN
1226-4873
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