Abstract
The paper presents the comparison of the energy absorption by perfect and amorphized nanorods under the cyclic loading. The calculations have been carried out with the molecular dynamic modeling. The cyclic loading is modeled by a periodical shift of a movable clamp along the X axis. The calculations are performed for the maximal clamp shift in respect to the equilibrium state, which corresponds to the relative deformation (equal to 0.3%). Frequencies varied from 0.085 THz to 10 THz. It has been discovered that both the dramatic growth of the maximal dispersion of atomic planes, and the dramatic growth of amplification of the maximal dispersion of atomic planes can be used as an index of the irreversible transformation of the crystal structure in the physical system differing from the perfect nanosized crystal. General behavior of the studied systems more depends on cyclic loading parameters than on the object crystal structure. Under the cyclic loading modeled with the aid of the periodical shift of the movable clamp, the frequency makes the critical impact on the results.
Highlights
The present work is addressed to the analysis of the energy absorption of the external action by a nanorod under the cyclic action and to the investigation of the effect of defects in the sample on this process
To solve the stated task, the numerical analysis of the processes in the nanosized nanorod has been performed at the cyclic uniaxial pull, by the molecular dynamics method
The authors found the indices of the beginning defects in the nanorod; they are generated by the effect of the external harmonic uniaxial push-pull which is described by the periodical shift of the rod free end [1]
Summary
The present work is addressed to the analysis of the energy absorption of the external action by a nanorod under the cyclic action and to the investigation of the effect of defects in the sample on this process. The outlook of the nanorod end face (in the YZ plane) shows that for the amorphized crystal case, the accurate calculation of the area of the left immovable and right movable clamps is extremely difficult. At this stage of investigations, the area of the amorphized rod is calculated in the same way as for the perfect crystal: we find the coordinates of the external edges by the Y, Z axes as the mean coordinate of the atoms in this plane. It is better to use for comparison the atomic planes dispersion deviation from its initial value (Fig. 7 (b))
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