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Acoustic emission from a dislocation kink accelerated by an external force

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
The emission of elastic waves from a dislocation kink accelerated by a constant external force is presented. The dynamics of the dislocation kink interacting with longitudinal acoustic waves is described by a sine-Gordon--d'Alembert system, i.e. a sine-Gordon equation nonlinearly coupled with the d'Alembert wave equation. Within the framework of this model, the evolution of velocity of the dislocation kink altered by the applied force is determined, allowing for mechanical couplings. The total energy radiated from the dislocation kink and its spectral composition is calculated numerically and analytically. Computer simulations are presented, which graphically illustrate the analytical considerations and model the acoustic radiation.
Rocznik
Strony
247--253
Opis fizyczny
Bibliogr. 7 poz., rys., wykr.
Twórcy
autor
  • University of Thessaloniki, School of Engineering, Mechanics Division, Thessaloniki 54124, Greece
autor
  • University of Thessaloniki, School of Engineering, Physics Division, Thessaloniki 54124, Greece
autor
  • University of Thessaloniki, School of Engineering, Physics Division, Thessaloniki 54124, Greece
Bibliografia
  • [1] JAMES D. R., CARPENTER H., Relationship between AE and dislocation kinetics in crystalline solids, J. Appl. Phys., 42, 4685–4689 (1971).
  • [2] FLEISHMANN P., LAKESTANI F., ROUBY D., Spectral and energy analysis of moving ultrasonic source-application to AE of aluminum under plastic deformation, Mater. Sci. Engng., 29, 205–212 (1977).
  • [3] FLEISHMANN P., ROUBY D., Spectral analysis of AE from aluminum single-crystals undergoing plastic deformation, Phys. Stat. Sol. (a), 48, 439–445 (1978).
  • [4] SCHAARWACHTER W., EBENER H., Acoustic emission a probe into dislocation dynamics in plasticity, Acta Metall. Matter., 38, 195–205 (1990).
  • [5] POLYZOS B., TROCHIDIS A., Dislocation dynamics and acoustic emission during plastic deformation of crystals, Wave Motion, 21, 343–355 (1995).
  • [6] A. PAWELEK, Possibility of soliton description of AE during plastic deformation of crystals, J. Appl. Phys., 63, 5320–5325 (1988).
  • [7] KIVSHAR Y., MALOMED B. A., Dynamics of solitons in nearly integrable systems, Rev. Mod. Phys., 61, 673–915 (1989).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BAT3-0022-0032
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