The computer simulation of the internal friction peaks associated with the oscillation of geometric kinks along the nonscrew dislocation in the atmosphere of nonlinear power dissipating interstitials

1989-6-15
Oğurtanı, Tarık Ömer
Seeger, A
Show full item record
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
119
views
0
downloads
The effects of the nonlinear power dissipation on the strength and the position of the cold‐work internal friction peaks associated with the oscillation of geometric kinks in the atmosphere of paraelastic interstitials have been investigated by the novel numerical study of the related mathematical macromodel. The present macroscopic model of internal friction is described by a second‐order ordinary differential equation with a nonlinear Debye‐type dissipative drag term. This system shows not only dissipative resonance behavior, but it also results in unusually sharp energy dissipations, like the Cherenkov radiation, when the kink velocity exceeds the Snoek jump velocity of interstitials at high external driving force amplitudes
https://hdl.handle.net/11511/52100
Journal of Applied Physics
Department of Metallurgical and Materials Engineering, Article

Suggestions

The Effects of static aeroelasticity on the performance of two-dimensional converging diverging nozzles
Düzel, Ümran; Eyi, Sinan; Department of Aerospace Engineering (2014)
This thesis analyzes the effects of static aeroelasticity on the performance of two dimensional converging diverging nozzles. A Flow analysis is conducted on five different configurations of two dimensional converging-diverging nozzles. Computational study is validated with experimental data. Two of the configurations, which have the same throat area, throat radius, and convergence angle and total nozzle length, are selected as the baseline geometries. By modifying throat radius and keeping all other geomet...
The investigation of electronic, anisotropic elastic and lattice dynamical properties of MAB phase nanolaminated ternary borides: M 2 AlB 2 ( M = Mn , Fe and Co ) under spin effects
Surucu, Gokhan; YILDIZ, BUĞRA; Erkisi, Aytac; Wang, Xiaotian; Surucu, Ozge (Elsevier BV, 2020-10-01)
In the present study, the structural, electronic, magnetic, anisotropic elastic and lattice dynamic properties of the ternary metal borides (, and ) known as MAB phases have been investigated by density functional theory. The obtained results from the structural optimizations show that all these compounds have negative formation enthalpy implying the thermodynamic stability and synthesizability. The spin effects on the phases have been studied with the plotted energy-volume curves for different magnetic pha...
A Numerical approach for the solutions of fluid dynamics problems in the presence of magnetic field
Oğlakkaya, Fatma Sidre; Bozkaya, Canan; Department of Mathematics (2018)
This thesis is conducted to investigate numerically the two-dimensional steady or unsteady, laminar flow of viscous, incompressible and electrically conducting fluids in complex geometries subject to either uniform inclined magnetic field or nodal magnetic sources. Specifically, the hydromagnetic natural/mixed convection of either conventional fluid or water-based nanofluid flow and the heat transfer are considered in irregular enclosures with wavy walls. The equations governing the steady magnetohydrodynam...
The Investigation of Electronic, Elastic and Vibrational Properties of an Interlanthanide Perovskite: PrYbO3
KADEROĞLU, ÇAĞIL; SÜRÜCÜ, GÖKHAN; ERKİŞİ, AYTAÇ (2017-10-01)
The structural, mechanical, electronic and lattice dynamical properties of the PrYbO3 compound from the ABO(3)-type perovskite family have been investigated by performing the first-principles density functional theory calculations using the generalized-gradient approximation (GGA) with corrected Coulomb interactions (GGA+U). Structural parameters, formation energies and phase transition pressures for the five possible phases of this compound have been calculated. Then, the spin-dependent electronic band str...
The structure of turbulent flow in an open channel bend of strong curvature with deformed bed: Insight provided by detached eddy simulation
Constantinescu, George; Köken, Mete; Zeng, Jie (American Geophysical Union (AGU), 2011-05-12)
[1] Results of a detached eddy simulation (DES) are used to better understand the effects of the mean flow three-dimensionality and secondary currents on turbulence and boundary shear stresses and the mechanisms through which the momentum and Reynolds stresses are redistributed in a strongly curved 193 degrees bend with fixed deformed bed corresponding to the later stages of the erosion and sedimentation process. The ratio between the radius of curvature of the curved reach and the channel width is close to...
Citation Formats
T. Ö. Oğurtanı and A. Seeger, “The computer simulation of the internal friction peaks associated with the oscillation of geometric kinks along the nonscrew dislocation in the atmosphere of nonlinear power dissipating interstitials,” Journal of Applied Physics, pp. 4679–4687, 1989, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/52100.
METU IIS - Integrated Information Service open@metu.edu.tr