User:OlegPlekhov/Plekhov, Oleg

Oleg Anatolyevich Plekhov (born July 9, 1974, Perm) is a Russian mechanical scientist, Doctor habilitatus (2010), Professor of the Russian Academy of Sciences (2016), Corresponding member of the Russian Academy of Sciences (2022), Director of the Perm Federal Research Center of the Ural Branch of the Russian Academy of Sciences (2022), member of the Presidium of the Ural Branch Russian Academy of Sciences (2022).

In 1991, he graduated from Lyceum No. 1 at the Perm Polytechnic Institute, Perm Polytechnic University (1997) and postgraduate studies at the Institute of Continuum Mechanics of the Ural Branch of the Russian Academy of Sciences.

In 2000 he got his PhD thesis "Modeling of nonlinear dynamics of cracks and localized fracture in load waves", in 2009 doctoral thesis "Structural and kinetic mechanisms of deformation and destruction of materials in coarse-grained and submicrocrystalline states". He held the positions of a leading researcher, Science Director the ICMM UB RAS.

Professor of the Department of Dynamics and Strength of PNRPU Machines and the Department of Continuum Mechanics and Computational Technologies of PSNIU, teaches special courses on fracture mechanics.

Member of the editorial board of the journals "Fracture and Structural Integrity", Diagnostics, Resource and Mechanics of materials and structures, Geosystems of transition zones, Bulletin of the Perm Federal Research Center.

Member of the Russian National Committee for Theoretical and Applied Mechanics. Member of the Russian National Committee of ESIS (European Society for Structural Integrity).

Expert of the Russian Academy of Sciences the Federal State Budgetary Research Institute of the Russian Academy of Sciences, member of the Expert Council of the Russian Science Foundation.

Winner of the first degree Perm Krai Prize for the best work in the field of physical and mathematical sciences in 2017.

He is the author of more than 300 articles in Russian and international journals.

The main areas of research are related to the thermodynamics of the processes of plastic deformation and destruction of structural materials. A cycle of fundamental studies of the processes of energy accumulation and dissipation in metals has been performed, new results have been obtained in the field of describing the dissipative and strength properties of promising nanostructured materials, methods for rapid assessment of the fatigue limit have been proposed, the features of metal destruction in the field of gigacycle fatigue have been investigated, practical aspects of the implementation of methods for increasing the fatigue life of structural materials have been developed.

In the scientific works of Plekhov O.A., for the first time in the Russian Federation, the effectiveness of using the infrared thermography method in the study of energy storage and dissipation problems was shown. A method has been developed that includes methodological, software and hardware solutions that allow analyzing the evolution of heat sources in a material during deformation and destruction. New results have been obtained in the field of thermodynamics of the propagation of fatigue cracks in metals, which initiated active research on this issue in various research centers in Russia and abroad. The possibility of effective use of the infrared thermography method in conducting interdisciplinary research, in particular, in the process of diagnosing a number of socially significant diseases, is shown.

Plekhov O.A. performed a wide range of experimental and theoretical studies devoted to the analysis of the stress-strain state in the vicinity of stress concentrators. Based on the analysis of self-similar solutions of equations describing the behavior of an ensemble of mesoscopic defects, a generalization of the theory of critical distances for the case of dynamic loading is proposed. A number of theoretical and applied results were obtained for the first time.

Plekhov O.A. obtained new theoretical and experimental results in the field of the behavior of metals under loading in the mode of gigacycle fatigue. Experimental methods are proposed to analyze the features of the processes of accumulation of defects and the transition from dispersed to macroscopic destruction in the mode of gigacycle fatigue. The results obtained have found practical application in work with enterprises of the aircraft manufacturing and military-industrial complex.

Plekhov O.A. obtained new defining relations describing the balance of energy in the material in the process of deformation and destruction, on the basis of the development of the traditional structural and energy theory, new energy criteria of destruction are proposed. As a result of theoretical research, a basis has been created for 3D numerical modeling of deformation and fracture processes, energy accumulation in the material during deformation, nucleation and propagation of fatigue cracks. The processes of transition from a rectilinear to a branching mode of crack propagation and propagation of fracture waves in brittle materials are simulated.

In recent years, Plekhov O.A. has been actively working in the field of modeling the mechanical behavior of the processes of deformation and destruction of frozen soils. Theoretical research in this area has received the support of the Russian Foundation for Basic Research, practical results have found real application in the creation of innovative monitoring systems for frozen wall in Russia and abroad.

Under the leadership of O.A. Plekhov, a laboratory of Thermomechanics of solids was created at the Institute, together with laboratory staff he created the only robotic complex in Russia for the implementation of the method of laser impact forging of metals and alloys, which allows conducting a wide range of studies on the interaction of intense laser radiation with matter. Using the complex, new results were obtained in the field of design of residual stresses in products of complex geometry and a number of practical works were performed to increase the fatigue life of aviation alloys.

Plekhov O.A. is the author of more than 360 scientific publications (according to the RSCI, the Hirsch index is 18), including 170 foreign publications (according to Scopus and WoS, the Hirsch index is 17). The results of his research have been repeatedly presented at All-Russian and International conferences on the mechanics of deformable solids. He has trained four candidates of physical and mathematical sciences.

Plekhov O.A. actively develops international cooperation. During his scientific work at the Institute, Plekhov O.A. completed long-term scientific internships at the Karlsruhe Research Center (Germany), the LAMEF-ENSAM laboratory (France), the Polytechnic Institute of Turin (Italy), the University of Sheffield (Great Britain). Plekhov O.A. participated in joint projects with leading Russian and foreign scientific centers in Germany, France, Italy, Great Britain, and India. At the initiative of O.A. Plekhov, special issues of the journal Fracture and Structural Integrity, were prepared in 2012, 2019 and 2022, dedicated to the current state of research in the field of fracture mechanics in Russia. Since 2020, Plekhov O.A. has been participating in the work of the world-class scientific center "Supersound".

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