Mechanical properties and sound velocity of gold copper (AuCu) II superlattice: 3D molecular dynamic (MD) simulation
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Physics Department Menoufia University, Gamal Abd El-Nasir, Menoufia, Egypt
Submission date: 2019-10-24
Final revision date: 2020-02-07
Acceptance date: 2020-02-21
Online publication date: 2020-10-15
Publication date: 2020-10-15
Corresponding author
Mohammed Mahmoud Aish   

physics, Menoufia University: Shebin El-Kom, EG, 4, 32088, shebien El Koom, Egypt
Journal of Theoretical and Applied Mechanics 2020;58(4):901-909
Young’s modulus, yield stress and Poisson’s ratio are studied for different size and tem- perature. The temperature dependence of simulated Young’s modulus is quite similar to experimental results. Transverse sound velocity is estimated from the simulated elastic con- stants at each temperature. The dislocation speed reaches up to 75% of the transverse sound velocity. The dislocation speed decreases with increasing temperature linearly. The tempera- ture dependence of macroscopic deformation behavior and the possibility of the existence of supersonic dislocations are discussed. The transverse sound velocity and rigidity G is calcu- lated from Young’s modulus, Poisson’s ratio and density ρ which changes with temperature.
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