Doklady Physics 

About: Doklady Physics is an academic journal published by MAIK Nauka/Interperiodica. The journal publishes majorly in the area(s): Boundary value problem & Vortex. It has an ISSN identifier of 1028-3358. Over the lifetime, 3499 publications have been published receiving 15330 citations. The journal is also known as: Soviet Physics-Doklady & Physics-Doklady.

Mechanism of stochastic resonance

Abstract: Stochastic resonance in an overdamped oscillator is considered theoretically. It has been shown that a seeming resonance is actually caused by a noise-induced change in the effective stiffness and damping factor with respect to a signal. For a certain noise intensity, the effective stiffness is minimal, which leads to a nonmonotonic variation of the output-signal amplitude as a function of noise intensity. It is substantial that the position of the minimum of the effective stiffness and its value depend strongly on the signal frequency. The results are compared with similar processes for vibrational resonance. Considerable differences between these phenomena are indicated.

Incubation Time Criterion and the Pulsed Strength of Continua: Fracture, Cavitation, and Electrical Breakdown

Abstract: Experiments on the dynamic fracture of solids, liquids, conductors, and insulators that is caused by fast intense actions of environment or directed energy fluxes reveal a number of effects indicating a fundamental difference between the fast dynamic rupture (breakdown) of materials and a similar process under slow quasistatic actions. For example, one of the basic problems in testing the dynamic-strength properties of materials is associated with the dependence of the limiting characteristics on the duration, amplitude, and growth rate of an external action, as well as on a number of other factors. Whereas a critical value is a constant for a material in the static case, experimentally determined critical characteristics in dynamics are strongly unstable, and as a result, their behavior becomes unpredictable. The indicated (and some other) features of the behavior of materials subjected to pulsed actions are common for a number of seemingly quite different physical processes, such as dynamic fracture (starting cracks and splitting), cavitation in liquids, and electrical breakdown in solids. In this paper, we analyze examples illustrating typical dynamic effects inherent in the these processes. We propose a unified interpretation for the fracture of solids and liquids and electrical breakdown in insulators using the structural-time approach [1, 2] based on the concept of the fracture incubation time.

Heat transfer in infinite harmonic one-dimensional crystals

Abstract: A closed system of differential-difference equations describing thermal processes in one-dimensional harmonic crystals is obtained in the paper. An equation connecting the heat flow and the kinetic temperature is obtained as a solution of the system. The obtained law of heat conduction is different from Fourier’s law and results in an equation that combines properties of the standard heat equation and the wave equation. The resulting equation is an analytic consequence from the dynamical equations for the particles in the crystal. Unlike equations of hyperbolic heat conduction, this equation is time-reversible and has only one independent parameter. A general analytical solution of this differential equations is obtained, and the analytical results are confirmed by computer simulations.