Prof. Dr. Alexander E Filippov

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Academic Career Length

19Years (2008-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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24 January 2018 in Journal of Comparative Physiology A

Journal Article

Slow viscoelastic response of resilin

Alexander Kovalev

Alexander E Filippov

Stanislav Gorb

11 August 2018 in Tribology Letters

Journal Article

Numerical Model of the Slithering Snake Locomotion Based on the Friction Anisotropy of the Ventral Skin

Alexander E Filippov

G. Westhoff

A. Kovalev

S. N. Gorb

13 March 2023 in Philosophical Magazine

Journal Article

‘Turbulent’ shear flow of solids under high-pressure torsion

Yan Beygelzimer

Alexander E Filippov

Juri Estrin

The term ‘solid-state turbulence’ may sound like an oxymoron, but in fact it is not. In this article, we demonstrate that ‘solid-state turbulence’ may emerge owing to a defining property of the solid state: the ability of a solid to retain its shape. We consider shear flow under high-pressure torsion of layers of solids with different flow stress and show that the stiffer ones may spontaneously decompose into a set of blocks. This effect is fundamental for the occurrence of ‘solid-state turbulence’ (SST). To visualize SST, we use a heuristic model based on discretization of a continuum into interacting ‘particles’. The outcomes of the numerical experiments conducted support the occurrence of pulsations of velocity and pressure in plastically deforming solids and the emergence of vortices characteristic of classical turbulence. This phenomenon may have important practical implications for solid-state mixing as an ecologically beneficial alternative to conventional metallurgical processing routes.

23 May 2023 in Machines

Journal Article

Friction in Adhesive Contacts: Experiment and Simulation

Iakov A Lyashenko

Alexander E Filippov

Valentin L. Popov

An experimental study of the process of friction between a steel spherical indenter and a soft elastic elastomer, with a strongly pronounced adhesive interaction between the surfaces of the contacting bodies, is presented. We consider sliding of the indenter at low speed (quasi-static contact) for different indentation depths. The forces, displacements and contact configuration as functions of time were recorded. The most important finding is that under conditions of uni-lateral continuous sliding, the tangential stress in the contact area remains constant and independent on the indentation depth and details of loading. We suggest a simple numerical model in which the elastic substrate is considered as a simple elastic layer (thus reminding a two-dimensional elastic foundation), although with in-plane elastic interactions. It is found that this model leads to the dynamic scenarios which qualitatively resemble the experimentally observed behavior of the considered system.

8 August 2018 in Journal of The Royal Society Interface

Journal Article

Numerical simulation of the pattern formation of the springtail cuticle nanostructures

Alexander E Filippov

Alexander Kovalev

Stanislav Gorb

Springtails (Collembola) are known to exhibit complex hierarchical nanostructures of their exoskeleton surface that repels water and other fluids with remarkable efficiency. These nanostructures were previously widely studied due to their structure, chemistry and fluid-repelling properties. These ultrastructural and chemical studies revealed the involvement of different components in different parts of the nanopattern, but the overall process of self-assembly into the complex rather regular structures observed remains unclear. Here, we model this process from a theoretical point of view partially using solutions related to the so-called Tammes problem. By using densities of three different reacting substances, we obtained a typical morphology that is highly similar to the ones observed on the cuticle of some springtail species. These results are important not only for our understanding of the formation of hierarchical nanoscale structures in nature, but also for the fabrication of novel surface coatings.

1 October 2017 in Journal of Theoretical Biology

Journal Article

Numerical simulation of colloidal self-assembly of super-hydrophobic arachnid cerotegument structures

Alexander E Filippov

Jonas Wolff

Michael Seiter

Stanislav N. Gorb

About Me

Prof. Dr. Alexander E. Filippov is a Doctor of Physical and Mathematical Sciences (habilitated) at the Donetsk Institute for Physics and Engineering of the National Academy of Sciences of Ukraine. He studied theoretical physics and solid state physics and received an M.S. in Physics, Summa Cum Laude, from Donetsk State University, Ukraine (1979) and a Ph.D. in Physics from the Donetsk Institute for Physics and Engineering (1985). From 1989 till the beginning of the war in Ukraine, he worked at the Donetsk Institute for Physics and Engineering. In different years, Alexander E. Filippov was a member of the Scientific Council of this institute, a member of the specialized Doctoral Dissertation Scientific Council, and the chairman of the Joint Seminar. Prof. Filippov worked in collaboration with scientists from a number of internationally recognized research institutions in France, Israel, Germany, New Zealand, the Netherlands, etc. His research interests include phase transitions and critical phenomena, magnetism and superconductivity, physical kinetics, and different aspects of self-organization in physical, chemical, and biological systems.

Prof. Dr. Alexander E Filippov

Prof. Dr. Alexander E Filippov

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Representative Publications

About Me