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  • Critical shear stress under the superimposed hydrostatic and uniaxial normal stress conditions of C, Si, Ge, and SiC is evaluated by ab initio density functional theory calculations to investigate the response of ideal shear strength (ISS) to superimposed normal stresses in covalent crystals. We find a substantial difference in the responses of ISS to normal stress among the covalent crystals examined; e.g., hydrostatic compression increases the ISS of C but decreases that of Si, Ge, and SiC. The ISS is mostly a highly nonlinear and anisotropic function of normal stress. The results thus indicate that normal stresses can significantly affect the critical shear stress, which is crucial to interpreting experimental observations of crystal deformation, e.g., dislocation nucleation in nanoindentation.
  • Critical shear stress under the superimposed hydrostatic and uniaxial normal stress conditions of C, Si, Ge, and SiC is evaluated by ab initio density functional theory calculations to investigate the response of ideal shear strength (ISS) to superimposed normal stresses in covalent crystals. We find a substantial difference in the responses of ISS to normal stress among the covalent crystals examined; e.g., hydrostatic compression increases the ISS of C but decreases that of Si, Ge, and SiC. The ISS is mostly a highly nonlinear and anisotropic function of normal stress. The results thus indicate that normal stresses can significantly affect the critical shear stress, which is crucial to interpreting experimental observations of crystal deformation, e.g., dislocation nucleation in nanoindentation. (en)
Title
  • Effect of normal stress on the ideal shear strength in covalent crystals
  • Effect of normal stress on the ideal shear strength in covalent crystals (en)
skos:prefLabel
  • Effect of normal stress on the ideal shear strength in covalent crystals
  • Effect of normal stress on the ideal shear strength in covalent crystals (en)
skos:notation
  • RIV/00216305:26210/08:PU73202!RIV10-MSM-26210___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(OC 148)
http://linked.open...iv/cisloPeriodika
  • 3
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 365177
http://linked.open...ai/riv/idVysledku
  • RIV/00216305:26210/08:PU73202
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • shear strength, normal stress, ab initio (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [2B2EC55E3B87]
http://linked.open...i/riv/nazevZdroje
  • PHYSICAL REVIEW B
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 77
http://linked.open...iv/tvurceVysledku
  • Černý, Miroslav
  • Umeno, Yoshitaka
http://linked.open...ain/vavai/riv/wos
  • 000254542700001
issn
  • 1098-0121
number of pages
http://localhost/t...ganizacniJednotka
  • 26210
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