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Nikolina Ianakieva Bontcheva

Position: Associate member

Department: Solid Mechanics

Room number: 301

Phone: +359 2 979 6437

E-mail: boncheva@imbm.bas.bg

 

Scientific degrees, institution, year:

 

Ph. D., Institute of Mechanics, Sofia, 1966

Assoc. Prof., Institute of Mechanics, Sofia, 1975

DSc., Institute of Mechanics, Sofia, 1989

Prof. , Institute of Mechanics, Sofia, 1990

Fields of Research:

Metal forming plasticity, intermetallics, microstructure, phase transformation, Finite element method


Extended Information:

Recent Publications:

  1. Parashkevova L., Bontcheva N., Multiphase "in situ" composite - modelling and characterization, Journal of Theoretical and Applied Mechenics, in print

  2. Ludmila Parashkevova, Nikolina Bontcheva, Modelling and microstructure of multiphase "in situ" composite on the base of rapidly solidified Al alloys, Proc. 12th International Conference on Mechanics and Technology of Composite Materials, 2009, 418-423

  3. Parashkevova L., Bontcheva N., Influence of precipitations on elastic-plastic properties of Al alloys, Computational Materials Science, v.47, 153-161, 2009

  4. Ludmila Parashkevova, Nikolina Bontcheva, Multiscale Modeling of Powder "in Situ" Composite with Intermetallic Phase, J. of Material Science and Technology, 2009, v. 17, n. 4, 292-299

  5. Parashkevova L., Bontcheva N., Ductile failure during multistage metal forming of bulk materials, J. Mater. Sci. Technol., 2008, v. 16, n. 3, 181-191

  6. Ludmila Parashkevova, Nikolina Bontcheva, Multiscale modelling and structural characterization of Fe enriched Al alloy, PAMM, 2008, v. 8, 10409-10410

  7. Nikolina Bontcheva, Ludmila Parashkevova, Georgi Petzov, Modelling of a combined process of thermomechanical treatment of 304 stainless steel, PAMM, 2008, v. 8, 10453-10454

  8. L. Parashkevova, N. Bontcheva, S. Yaneva, N. Stoichev, Modelling of the inelastic behavior of powder based AlFe9V1Si2 alloy with intermetallic phase, Computational Materials Science, v.41, 3, 275-286, 2008.

  9. L. Parashkevova, P. Petrov, N. Bontcheva, G. Petzov, Finite element simulation of gears warm die forging, Journal of Theoretical and Applied Mechanics, v.37, 2, 33-44, 2007.

  10. L. Parashkevova, N. Bontcheva, A. Manescu, Processing of bulk rapidly solidified Al Fe-enriched alloys - modelling and microstructure, Journal of Theoretical and Applied Mechanics, v.37, 4, 61-78, 2007.

  11. Bontcheva N., Petrov P., Petzov G., Parashkevova L., Finite element simulation of strain induced austenite-martensite transformation and fine grain production in stainless steel, Computational Materials Science, v.40, 1, 90-100, 2007.

  12. Svetlana Yaneva, Nikola Stoichev, Adrian Manescu, Ludmila Parashkevova, Nikolina Bontcheva, Kostadin Petrov, Influence of solidification rate on the phase constitution of nano-sized intermetallics in Al-Fe-Si-V alloys, Proc. 9th Workshop Nanoscience & Nanotehnology, Sofia, 28 – 30 November, 2007, 2008, v. 8, 180-185

  13. Ivanova J., N. Bontcheva, F. Pastrone, M. Bonadies, Thermoelastic stress analysis for linear elastic bodies, In: Proc. 7th International Conference on Vibration Problems ICOVP 05-09 Sept. 2005, Istanbul, Turkey, Ed. Esin İnan, Ahmet Kiriş, Springer 2007, pp. 243-248

  14. Bontcheva N., Petrov P., Petzov G., Parashkevova L., Simulation of strain induced austenite-martensite transformation, PAMM, v.6, 1, 357 – 358, 2006.

  15. Bontcheva N., G. Petzov, L. Parashkevova, Thermomechanical modelling of hot extrusion of Al-alloys, followed by cooling on the press, Computational Materials Science, v.38, 83-89, 2006.

  16. Mahrenholtz O., N. Bontcheva, R. Iankov, Influence of surface roughness on friction during metal forming processes, Journal of Materials Processing Technology, v.159, 1, 9 – 16, 2005.

  17. Bontcheva N., G. Petzov, Total simulation model of the thermomechanical process in shape rolling of steel rods, Computational Materials Science, 2005, v.34, 4, 377 – 388.

  18. Petzov G., N. Bontcheva, Modelling of thermomechanical processing in extrusion of Al-alloys, Proceedings of the 8th CIRP International Workshop on Modeling of Machining Operations, Chemnitz, Germany, May 10-11, 2005,695-700.

  19. Bontcheva N., Petrov P., Petzov G., Parashkevova L., Finite element simulation of the fine grain austenite production in 304 stainless steel, Proc. 10th Jubilee National Congress on Theoretical and Applied Mechanics, 13-16 September 2005, Varna, 133-138.

  20. L. Parashkevova , N. Bontcheva , B. Ivanov, Ch. Sechenski, Finite element simulation of multiple non-mandrel cool extrusion of copper pipes, Proc. 10th Jubilee National Congress on Theoretical and Applied Mechanics, 13-16 September 2005, Varna, 306-311.

  21. Bontcheva N., G. Petzov, R. Iankov, Numerical investigation of microstructure evolution in metal forming processes, PAMM, v.4, 1, 2004, 304-305.

  22. Parashkevova L., J. Ivanova, N. Bontcheva, FEM modeling of thermo-mechanical behaviour of two-phase laminated plates, Journal of Theoretical and Applied Mechanics, 3, 2004, 29-42.

  23. Bontcheva N., G. Petzov, FEM-Rationalized TEMPCOR-process in shape rolling of steel rods, Proceedings of the International Congress Mechanical Engineering Technologies, Varna, 2004, 64 – 67.

  24. Parashkevova L., J. Ivanova, N. Bontcheva, Optimal design of functionally graded plates with thermo-elastic plastic behaviour, C. R. Mecanique, 332, 493-498, 2004.

  25. Bontcheva N., G. Petzov, Microstructure evolution during metal forming processes, Computational Materials Science, v.28, 3-4, 563-573, 2003.

  26. N. Bontcheva, G. Petzov, Numerical simulation of microstructural development in hot closed-die forging, Mashine Technics and Technology, v.4, NTS Varna and TU Varna, 47-52, 2003.

  27. Bontcheva N., G. Petzov, Phase transformation during metal forming processes, Proc. Int. Conf. New Trends in Continuum Mechanics, Constanza, Romania, September 8-12, 2003, Ed. M. Mihailescu-Suliciu, Theta Series in Advanced Mathematics, pp. 13-23.

  28. G. Petzov, N. Boncheva, Numerical prediction of microstructure evolution in hot forged steel, І-я Евразийская научно-практическая конференция "Прочностъ неоднородных структур", ПРОСТ 2002, Тезисы докладов, Москва, МИСиС, 16-18 апреля 2002 года, p.163

  29. N. Bontcheva, Influence of induced anisotropy in powder materials, Metal Powder Report, Volume 57, Issue 4, April 2002, Page 39.

  30. Mahrenholtz O., N. Bontcheva, R. Iankov, Nonlocal friction during metal forming processes, ZAMM, v.81, Suppl. 2, 353-354, 2001.

  31. Baltov A., N. Bontcheva, V. Kafka, Localization of plastic deformation and of continuum damage: different points of view, J. of Theoretical and Applied Mechanics, v.31, 2, 30-52, 2001.

  32. Petzov G., N. Bontcheva, Computer simulation of metal flow in die forging, In: Proc. IX Congress on Theoretical and Applied Mechanics, Varna, 19-22 Sept., 2001, v.1, 575-580, Ivanov Ya., Baltov A., Manoach E., Eds., Bulg. Academy of Sciences, Demetra Ltd.

  33. Lippmann H., N. Bontcheva, A. Baltov, Influence of the induced anisotropy in powder based materials, Int. J. Mech. Sciences, v.42, 2000, (593-615).

  34. Iankov R., N. Bontcheva, Finite element simulation of multi-level powder metal compaction processes, J. of Theoretical and Applied Mechanics, v.30, 2, 2000, 73-92.

  35. Mahrenholtz O., N. Bontcheva, R. Iankov, M. Datcheva, Investigation of the influence of surface roughness on metal forming processes, Mechanics Research Cpmmunications, v.27, 4, 2000, 393-402.

  36. Kolarov D., A. Baltov, N. Bontcheva, Mechanics of plastic media, Sofia, BAN, 1975, (in bulg.).

  37. Kolarov D., Baltov A., Bontcheva N., Mechanics of plastic media, Mir, Moscow, 1979, (in russian).

Recent Projects:

1985 - 1990 Joint project between the Technical University Munich and the Institute of Mechanics, Bulgarian Academy of Sciences: Thermisch beeinflußte Bildung lokalisierter Scherzonen bei der Umformung von Metallen, 436 BUL--113/21/10, supported by the Deutsche Forschungsgemeinschaft, Germany.

1991 - 1995 Joint project between the Technical University, Munich and the Institute of Mechanics, Bulgarian Academy of Sciences: Plastizität von pulvermetallurgischen Werkstoffen, 436 BUL--113/53/2, supported by the Deutsche Forschungsgemeinschaft, Germany.

1997 - 2000 Linkage Grant of the NATO Science Programme and Cooperation Partners: Investigation of metal forming processes taking into account coupled effects.

2004 – 2008 6th Frame Programme KMM-NoE WPR1: Intermetallics

Membership:

  1. Gesellschaft für Angewandte Mathematik und Mechanik (GAMM)

  2. Euromech

  3. Union of Bulgarian Mathematicians

  4. Union of Bulgarian Scientists

  5. The Bulgarian Association of Computational Mechanics

Honors: medal “Cyril and Metodi” III degree

Modified date:19-07-2018