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George Gogotsi

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George Gogotsi
Professor George Gogotsi
Born (1930-08-02) August 2, 1930 (age 94)
Kyiv, Ukrainian SSR
NationalityUkrainian
Other namesGeorge Antonovych Gogotsi
OccupationProfessor
Employer(s)Pisarenko Institute for Problems of Strength, National Academy of Science of Ukraine; Materials Research Centre.
Known forfracture mechanics, solid mechanics

Geо́rge Antо́novych Gogо́tsi (born August 2, 1930, Kyiv, Ukrainian SSR) is a soviet Ukrainian scientist, professor of solid mechanics, doctor of science, and leading researcher of the Pisarenko Institute for Problems of Strength of the National Academy of Sciences of Ukraine.

He has two sons – Yury Gogotsi, world-known professor of chemistry, materials science and nanotechnology at Drexel University, USA, and Oleksiy Gogotsi – engineer and materials scientist, daughter – Helena Gogotsi, physicist and materials scientist.

Research Interests

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His main research interests are focused on behavior of ceramics[1][2][3][4][5][6][7] single crystals,[8] glass,[9] refractories[10] under mechanical and thermal fracture[11] over a wide range of temperatures, and also on physical processes that control their deformation and fracturing at macro and micro levels.

Education

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1954 - M.S. in Mechanics, Kyiv Polytechnic Institute, Ukraine; 1966 - Ph.D. in Mechanics, Institute for Problems of Materials Science NAS USSR; 1986 - D.Sc. in Materials Engineering, Institute for Problems of Strengths, National Academy of Science of Ukraine; 1994 - Professor of Mechanics, National Academy of Sciences of Ukraine.

Scientific and Research Contribution

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At the beginning of his scientific work, Prof. G.A. Gogotsi investigated the processes of heat transfer, and then experimentally proved impossibility of creation of magnetohydrodynamic installations, intended for the direct conversion of thermal energy into electrical energy, which were of great interest in power engineering. He showed the practical impossibility of such transformation because of the lack of refractory materials that are operable at temperatures close to 3000 °C.

Further, he investigated the ceramic materials for nozzles of the rockets, for gas turbine and reciprocating engines, and also took part in the creation of the first Soviet tank gas turbine engine. He also studied the fracture resistance of ceramic armor, designed to protect people and equipment. A great deal of attention was paid to the research and creation of refractories,[12] as well as zirconia ceramics for engineering and medicine.[13][14][15][16][17]

He created ophthalmologic and medical super sharp scalpels from zirconium dioxide single crystals,[18][19][20][21][22] which were used in clinics in Kyiv, Moscow, Melbourne and Sydney. He also investigated the resistance to fracture of layered[23] and other brittle composite materials by their mechanical[24] and thermal loading in a wide range of temperatures.

To conduct research, he developed new methods of mechanical testing and created experimental equipment (its originality is protected by more than 30 author's certificates of the former USSR), which were widely used in scientific practice. For example, equipment for determining the complex of mechanical characteristics of brittle materials in the interval -150–1500 °C, for testing the heat resistance of hollow cylindrical samples (heating to 2800 °C with a programmable rate of temperature change and laser measurement of sample expansion), a panel furnace for radiant heating, suitable for testing the load-bearing capacity of flat specimens, which was awarded a gold medal of the Exhibition of Economic Achievements of the USSR, etc. For the invention of the ceramic armor, breastplate he was awarded “The inventor of the USSR”. This allowed him to conduct research at a high scientific and technical level and publish his results in international scientific journals even during the Iron Curtain time.

Professor George Gogotsi was the first scientist who introduced such concepts in applied material mechanics as a "brittleness measure",[25][26][27] "base diagram", "R-line", "FR-method", "fracture barrier”.

Also, he pays attention to the development of ceramic materials for engineering[28] and medicine[29] (protected by 10 author's certificates of the former USSR and patents of Ukraine). He is the author and co-author of more than 250 scientific publications in national and international journals, and his Hirsch index is 22 (Google Scholar),[30] Scopus h-index = 17 (Author ID: 7006707350),[31] according to the Web of Science database this index is h-index = 15 (ResearcherID: G-6331-2015)[32] (ISI data base).

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References

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  1. ^ Gogotsi, G.A. (2013). "Criteria of Ceramics Fracture (Edge Chipping and Fracture Toughness Tests)". Ceramics International. 3 (39): 3293–3300. doi:10.1016/j.ceramint.2012.10.017.
  2. ^ Gogotsi, G.A.; Drozdov, A.V.; Zavata, M.V. (1991). "Swain Comparison of the mechanical behaviour of zirconia partially stabilised with yttria and magnesia". Journal of the Australian Ceramic Society (27): 37–49.
  3. ^ Gogotsi, G.A.; Ostrovoy, D.Yu. (1995). "Deformation and strength of engineering ceramics and single crystals". Journal of the European Ceramic Society. 15 (4): 271–281. CiteSeerX 10.1.1.558.8171. doi:10.1016/0955-2219(95)90349-N.
  4. ^ Gogotsi, G.A.; Galenko, V.I.; Mudryk, M.P.; Ostrovoy, D.Yu.; Ozersky, B.I.; Khvorostyany, V.V.; Khristevich, T.A. (2010). "Fracture behaviour of Y-TZP ceramics: new outcomes". Ceramics International. 36 (1): 345–350. doi:10.1016/j.ceramint.2009.09.001.
  5. ^ Gogotsi, G.A.; Gogotsi, Yu.G.; Zavada, V.P.; Traskovskya, V.V. (1989). "Stress corrosion of silicon nitride based ceramics". Ceramics International. 15 (5): 305–310. doi:10.1016/0272-8842(89)90033-3.
  6. ^ Gogotsi, G.A.; Galenko, V.I.; Ozersky, B.I; Mudrik, S.P. (2010). "Fracture resistance estimation of elastic ceramics in edge flaking: EF baseline". Journal of the European Ceramic Society. 30 (6): 1223–1228. doi:10.1016/j.jeurceramsoc.2009.12.002.
  7. ^ Gogotsi, G. (2006). "Flaking toughness of advanced ceramics: ancient principle revived in modern times". Materials Research Innovations. 10 (2): 179–186. Bibcode:2006MatRI..10..179G. doi:10.1179/mri.2006.10.2.179. S2CID 135934700.
  8. ^ Gogotsi, G.A.; Ostrovoy, D.Yu. (1995). "Deformation and strength of engineering ceramics and single crystals" (PDF). Journal of the European Ceramic Society. 15 (4): 271–281. CiteSeerX 10.1.1.558.8171. doi:10.1016/0955-2219(95)90349-N. Archived from the original (PDF) on 2009-11-22. Retrieved 2017-10-30.
  9. ^ Gogotsi, G.A.; Mudrik, S.P. (2010). "Glasses: New approach to fracture behavior analysis" (PDF). Journal of Non-Crystalline Solids. 356 (20–22): 1021–1026. Bibcode:2010JNCS..356.1021G. doi:10.1016/j.jnoncrysol.2010.01.021.
  10. ^ Gogotsi, G.A.; Pisarenko, G.S.; Grushevskii, Y.L. (1978). "A method of investigating refractory nonmetallic materials in linear thermal loading". Kluwer Academic Publishers-Plenum Publishers. 10 (4): 406–413. doi:10.1007/BF01523789. S2CID 137112458.
  11. ^ Gogotsi, G.A. (1982). Strength of machine-building nitride ceramics (Preprint ed.). Kyiv: Institute for problems of Strength, National Academy of Science Ukrainian SSR.
  12. ^ Gogotsi, G. (1982). Inelasticity of ceramics and refractories. Kyiv, Ukrainian SSR: Institute for problems of Strength of National Academy of Science Ukrainian SSR.
  13. ^ Gogotsi, G. (1974). "Thermal shock resistance and mechanical characteristics of materials based on zirconium dioxide" (PDF). Strength of Materials. 6 (6): 732–736. doi:10.1007/BF01528077. S2CID 135771323.
  14. ^ Gogotsi, G. (1988). "Strength and crack resistance of ceramics based on zirconium dioxide". Strength of Materials. 20 (1): 61–64. doi:10.1007/BF01524353. S2CID 136560897.
  15. ^ Gogotsi, G. (1991). "Strength, fracture toughness, and acoustic emission of ceramics based on partially stabilized zirconium dioxide". Strength of Materials. 23 (1): 45–51. doi:10.1007/BF00769951. S2CID 136478678.
  16. ^ Gogotsi, G. (1991). "Mechanical behavior of zirconium dioxide crystals partially stabilized with yttrium oxide". Strength of Materials. 23 (1): 86–91. doi:10.1007/BF00769958. S2CID 135526379.
  17. ^ Gogotsi, G.A.; Lomonova, E.E.; Osiko, V.V. (1991). "Mechanical properties of zirconium dioxide single crystals intended for structural applications". Refractories & Industrial Ceramics. 32 (7–8): 398–403. doi:10.1007/BF01282023. S2CID 92990051.
  18. ^ Gogotsi, G.A.; Dub, S.N. (1995). "Vickers and knoop indentation behaviour of cubic and partially stabilized zirconia crystals". Journal of the European Ceramic. 15 (5): 405–413. doi:10.1016/0955-2219(95)91431-M.
  19. ^ Gogotsi, G.A.; Lomonova, E.E.; Pejchev, V.G. (1993). "Strength and fracture toughness of zirconia crystals". Journal of the European Ceramic Society. 11 (2): 123–132. doi:10.1016/0955-2219(93)90043-Q.
  20. ^ Gogotsi, G. (1998). "Mechanical behaviour of yttria-and ferric oxide-doped zirconia at different temperatures" (PDF). Ceramics International. 24 (8): 589–595. CiteSeerX 10.1.1.543.9625. doi:10.1016/S0272-8842(97)00060-6.
  21. ^ Gogotsi, G.A.; Zavata, V.P.; Drozdov, A.V.; Swain, M.V. (1991). "Comparison of the mechanical behaviour of zirconia partially stabilised with yttria and magnesia". Journal of the Australian Ceramic Society. 27 (1–2): 37–49. ISSN 0004-881X.
  22. ^ Gogotsi, G; Swain, M (1993). "Comparison of strength and fracture toughness of single and polycrystalline zirconia". Science and Technology of Zirconia V. pp. 347–359. ISBN 9781566760737.
  23. ^ Gogotsi, G.; Lugovy, M.; Orlovskaya, N.; Slyunyayev, V. (2002). "Crack bifurcation features in laminar specimens with fixed total thickness". Composites Science and Technology.
  24. ^ Gogotsi, G.; Ostrovoy, D. (1995). "Strength and fracture of partially stabilized zirconia crystals under different loading conditions". Fourth Euro Ceram. 3: 107–114.
  25. ^ Gogotsi, G. (1989). "The use of brittleness measure (ξ) to represent mechanical behaviour of ceramics". Ceramics International. 15 (2): 127–129. doi:10.1016/0272-8842(89)90025-4.
  26. ^ Hetnarski, Richard B. (2014). Encyclopedia of thermal stresses. Dordrecht: Springer Reference. ISBN 9789400727380.
  27. ^ Gogotsi, G. (1973). "Determination of brittleness of refractories tested for heat resistance". Strength of Materials. 5 (10): 1186–1189. doi:10.1007/BF01129398. S2CID 135744650.
  28. ^ Gogotsi, G. (1982). "Strength of Machine-Building Nitride Ceramics". The Institute for Problems of Strength, Kiev: 59.
  29. ^ Gogotsi, G.; Lamonova, E.; Furmanov, Yu.; Savitskaya, I. (1994). "Zirconia crystals suitable for medicine: 1. Implants". Ceramics International. 20 (5): 343–346. doi:10.1016/0272-8842(94)90052-3.
  30. ^ "Google Scholar statistics of prof. George Gogotsi". Google Scholar.
  31. ^ "Scopus statistics for George Gogotsi". Scopus Author Identifier.
  32. ^ "Statistics in Web of Science for George Gogotsi". Researcher ID.
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