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IssuesArchive of Issues2017-3pp.165-172

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"Irina Georgiyevna Goryacheva (on her birthday)," J. Appl. Math. Mech. 81 (3), 165-172 (2017)
Year 2017 Volume 81 Issue 3 Pages 165-172
DOI 10.1016/j.jappmathmech.2017.08.009
Title Irina Georgiyevna Goryacheva (on her birthday)
Abstract Academician Irina Georgievna Goryacheva, a scientist of world renown and a prominent specialist in the field of mechanics of deformable solids, contact interaction mechanics, and tribology, celebrated her birthday on 30 May 2017.

I.G. Goryacheva graduated with honours from the Mechanics and Mathematics Faculty of the Lomonosov Moscow State University in 1970 (the Department of Plasticity Theory), and in 1974 she completed her first postgraduate degree studies in this department, her thesis being ‘An investigation into rolling friction with allowance for slippage and viscoelasticity’. Her scientific supervisor in these years was L.A. Galin, an outstanding scientist in the field of mechanics and a corresponding member of the USSR Academy of Sciences. He played a key role in I.G. Goryacheva becoming an inquisitive researcher able to formulate and solve complex theoretical and applied problems. In 1988 she defended her doctoral thesis on ‘Contact problems in tribology’ and was awarded the scientific degree of Doctor of Physical and Mathematical Sciences. In 1997 she was elected as a corresponding member of the Russian Academy of Sciences, and in 2003 as a full member of the Russian Academy of Sciences, specializing in Mechanics.

The entire scientific career of I.G. Goryacheva has been inextricably linked with the Institute for Problems in Mechanics of the Russian Academy of Sciences. She has been working there since 1973, and for more than 20 years she has headed its Tribology Laboratory.

The scientific interests of I.G. Goryacheva have largely been associated with problems of the mechanics of contact interactions of deformable solids and their applications in tribology, biomechanics, engineering, transport, and power engineering. Her work has been characterized by a combination of fundamental and practical research and a complexity of scientific approaches using methods of theoretical and experimental analysis.

The most significant scientific results obtained by I.G. Goryacheva include the development of the theoretical principles of discrete contact mechanics, for the first time considering the interaction of rough bodies and the processes occurring in the contact region as a result of the collective behaviour of elementary microcontacts. The approach developed by her, based on the examination of contact interaction on two scale levels, has formed the basis of a method for calculating the contact characteristics of bodies with allowance for surface macroshape and roughness. This research is of great importance for the development of engineering methods for calculating the rigidity of joints between homogeneous and inhomogeneous rough bodies.

I.G. Goryacheva has made a large contribution to the development of methods for solving the mixed problems of elasticity and vis- coelasticity theory that arise in the examination of the contact interaction of bodies under conditions of sliding friction, rolling friction, and also preliminary displacement, where the region of contact interaction is divided into zones of adhesion and relative slip. This research formed the basis of a numerical analytical method for calculating the stress state and shape of worn surfaces during fret- ting under conditions of complete or partial slippage of surfaces in the region of contact interaction, which is based on introducing two timescales: the time of a single cycle of change in the tangential load, and the time corresponding to the prescibed number of cycles.

I.G. Goryacheva has paid special attention to studying the contact interaction of inhomogeneous bodies and bodies with coatings and thin surface layers under conditions of boundary and hydrodynamic friction. In particular, in order to model the effect of self-lubrication of composite materials under conditions of frictional interaction, she developed a model of the formation of a protective surface film during frictional interaction of multicomponent alloys containing a soft phase separating out into the region of friction under conditions of contact interaction. She proposed a method for calculating the stress state of homogeneous and inhomogeneous soft biological tissues by introducing a sensor tip of prescribed shape into the investigated section of tissue. These results formed the basis for development of a device for determining the elastic properties of soft tissues in the process of non-invasive surgery.

In her studies, I.G. Goryacheva developed the theory of interaction of elastic and viscoelastic bodies in the presence of adhesion forces of different nature, within the framework of which the combined influence of physical, mechanical, and geometric properties of the surface and thin surface layers on friction and wear is investigated. These studies have acquired special importance today, given the development of nanotechnologies and the creation of various micro- and nanodevices. She obtained analytical solutions of problems concerning the interaction of elastic bodies, with allowance for their surface energy, and also capillary effects associated with the presence of thin fluid films on the surface; the dependence of the energy loss taking place in the cycle of moving together and drawing apart of bodies on their elastic and geometric characteristics, surface energy, and on the amount of fluid in the gap was studied. A method for calculating the adhesion component of the friction force during the rolling and sliding of elastic bodies with rough surfaces was put forward.

I.G. Goryacheva proposed approaches to the modelling of the failure of surfaces during friction on different scale levels. Using methods of the mechanics of contact interaction and failure, a model of the fatigue failure of the surface layers of rough bodies was developed that made it possible, from common positions, to describe two types of failure of a material: surface failure and subsurface failure. This model was used for qualitative and quantitative analysis of the process of formation of contact fatigue defects on railway wheels and track. A model of the wear of a fibrous composite material was proposed that was based on two scales of examination of the wear process: the macroscale, on which the difference in the coefficients of wear resistance of the fibre, the matrix, and the intermediate layer is taken into account, and the microscale, associated with analysis of the stress state close to an individual fibre. The results of such modelling were used to optimize the structure of carbon-carbon composites used in brake discs, in order to increase their wear resistance on braking.

I.G. Goryacheva has made a significant contribution to the theory of contact interaction of bodies with allowance for their wear (the wear contact problem). She developed a general method for solving wear contact problems with a fixed contact area, determined the conditions of existence and asymptotic stability of the steady-state regime of the process, and formulated and solved the wear contact problem with a discrete nature of interaction. She was the first to formulate and solve wear contact problems taking into account the inhomogeneities of the geometric and tribological parameters of the friction pair, which made it possible to study the nature of deformation during friction of fibrous, rough, and locally strengthened surfaces, and also to investigate the inverse problem of the purposeful creation of inhomogeneous surfaces with improved tribocharacteristics. On the basis of these results, methods were developed for calculating the kinetics of wear of plain bearings, piston rings, slide guides, cutting boring tools, railway wheels and track, the friction assemblies of nuclear power stations, and so on.

I.G. Goryacheva is the author of over 150 scientific articles, five monographs, and a number of inventions. Her studies are noted for mathematical rigour and a practical meaning.

I.G. Goryacheva fruitfully combines her research work with her teaching as a professor in the Department of Controllable and Gyroscopic Systems of the Moscow Institute of Physics and Technology and as a professor in the Department of Plasticity Theory of Lomonosov Moscow State University. She supervises the research of students and postgraduates, and the preparation of diploma, first-postgraduate-degree, and doctoral studies. The School of Mechanics of Contact Interactions and Tribology that was created by I.G. Goryacheva is widely known among scientists of this country and beyond its borders. For many years she has supervised the work of seminars on the mechanics of frictional interaction (Institute for Problems in Mechanics, Russian Academy of Sciences) and on the mechanics of deformable solids (Institite of Mechanics, Lomonosov Moscow State University).

The scientific achievements of I.G. Goryacheva have been recognized in Russia and abroad. She became a Lenin Komsomol Prize Laureate in the field of science and engineering in 1979, and in 2005 was awarded the National Prize ‘Olympia’ for Public Recognition of the Achievements of Russian Women, in the category of ‘Scientific Activity’, for her outstanding results in the development of fundamental science, and in 2007, within a team of authors, the Prize of the Government of the Russian Federation in the field of science and engineering. Her achievements in the field of tribology were marked in 2009 by an International Gold Medal in Tribology, under the auspices of the Institution of Mechanical Engineers in the United Kingdom.

I.G. Goryacheva is Chair of the Russian National Committee on Theoretical and Applied Mechanics, Chair of the Interdepartmental Scientific Council on Tribology of the Russian Academy of Sciences, the Ministry of Science and Education of the Russian Federation, and the Russian Union of Scientific and Engineering Public Associations, and a member of the General Assembly and Bureau of the International Union on Theoretical and Applied Mechanics (IUTAM), the European Society of Mechanics (EUROMECH), and the Society of Mechanics of Germany (GAMM). She is Chair of the Expert Committee in the field of mechanics, engineering, and control processes for awarding gold medals of Russian Academy of Sciences to young scientists and students. She is an Honorary Doctor of the Metal-Polymer Research Institute of Mechanics (Gomel, Belarus) and an Honorary Professor of the Tver Technical University (Tver, Russia). She is doing great work in organizing All-Russian and international scientific conferences in the field of mechanics and tribology, and is a member of the editorial board of a number of leading Russian and foreign journals: Journal of Applied Mathematics and Mechanics, Computational Continuum Mechanics, Physical Mesomechanics, Wear, Friction, and Journal of Engineering Tribology. She holds the post of Deputy Editor-in-Chief of the international Journal of Friction and Wear.

The unaffectedness, modesty, and kindness she displays in her everyday dealings with colleagues are distinctive features of the character of Irina Georgiyevna, and with that she has a high sense of responsibility for matters entrusted to her and is highly principled in the way in which she goes about her work.

The editorial staff and editorial board of the Journal of Applied Mathematics and Mechanics, her colleagues and disciples send their heartfelt best wishes to Irina Georgiyevna Goryacheva on her birthday and wish her good health and further success in her multifaceted activities.
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