Group

Senior Scientist

Kamen Tushtev

Kamen Tushtev, Dr.-Ing.

Am Biologischen Garten 2
IW3, Room 2180
28359 Bremen
Tel. 0421 218 64947

tushtev@uni-bremen.de

Research Interests

  • mechanical property and modelling of ceramic matrix composites
  • mechanics of bioceramic composites
  • numerical simulation (Finite Element Method)
  • mechanical testing of materials

Education

12/1998 Ph.D. in Mechanics and Strength of Materials
02/1992 - 02/1995 Ph.D. Student, Department of Strength of Materials, Technical University of Sofia, Bulgaria
10/1990 - 12/1991 Post-graduate course in Mechanical Systems, TU Sofia
10/1985 - 7/1990 Diploma in Mechanical Engineering, TU Sofia

Positions and Work Experience

02/2011 - Senior Scientist in the Advanced Ceramics Group, University of Bremen
09/2001 -01/2011 Postdoctoral research fellow, Ceramic Materials and Components, University of Bremen
10/1998 - 09/2001 Assistant professor, Department of Strength of Materials, TU Sofia
06/1995 – 09/1998 Research Engineer, Department of Strength of Materials, TU Sofia

Awards and Fellowships

5/2000 - 7/2000 DAAD Research grant A/00/17151, Technical Mechanics, Martin-Luther-University Halle-Wittenberg

Teaching

Faserverbundwerkstoffe

Publications

  1. Matrix compositions and their impact on grain growth and strength of oxide ceramic composites.
    Almeida, R.S.M., Rech, M., Condi Mainardi, J., Tushtev K., Rezwan, K.,
    Journal of the American Chemical Society, 2024
    Volume: 107, Nr. (10), p. n/a
    https://doi.org/10.1111/jace.20069

  2. The use of bundles with higher filament count for cost reduction of high-strength oxide ceramic composites.
    Almeida, R. SM, Hoque, M. A., Pritzkow, W. EC., Tushtev, K., Rezwan, K.,
    Open Ceramics, 2023
    Volume: 15, Nr. ( 0 ), p. 100389
    https://doi.org/10.1016/j.oceram.2023.100389

  3. Identifying damage mechanisms of composites by acoustic emission and supervised machine learning.
    Almeida, R. SM, Magalhães, M. D., Karim, Md N., Tushtev, K., Rezwan, K.,
    Materials and Design, 2023
    Volume:  227 , Nr. (0 ), p. 111745
    https://doi.org/10.1016/j.matdes.2023.111745

  4. Fatigue behavior and damage analysis of PIP C/SiC composite
    Almeida, R., Besser, B., Tushtev, K., Li, Y., Rezwan, K.,
    Journal of the European Ceramic Society, 2022
    Volume:  42 , Nr. ( 13 ), p. 5391-5398
    https://doi.org/10.1016/j.jeurceramsoc.2022.06.053

  5. Evaluation of mechanical properties of a dense SiC/SiCN composite produced via PIP process
    Shi, Y., Süß, F., Horvath, J., Koch, D., Tushtev, K.,
    Journal of the European Ceramic Society , 2022
    Volume:  42 , Nr. ( 3 ), p. .
    https://doi.org/10.1016/j.jeurceramsoc.2021.11.009

  6. Characterization and modeling of tensile properties of continuous fiber reinforced C/C-SiC composite at high temperatures
    Shi, Y., Kessel, F., Friess, M., Jain, N., Tushtev, K.,
    Journal of the European Ceramic Society , 2022
    Volume:  41 , Nr. ( 5 ), p.
    https://doi.org/10.1016/j.jeurceramsoc.2020.09.043

  7. Enhancing thermal stability of oxide ceramic matrix composites via matrix doping
    Almeida, R. SM, Farhandi, H., Tushtev, K., Rezwan, K.,
    Journal of the European Ceramic Society , 2022
    Volume:  42 , Nr. ( 7 ), p.
    https://doi.org/10.1016/j.jeurceramsoc.2022.02.040

  8. Increasing the tensile strength of oxide ceramic matrix mini‐composites by two-step sintering
    Farhandi, H., Karim, Md N., Almeida, R. SM, Tushtev, K., Rezwan, K.,
    Journal of the American Ceramic Society , 2021
    Volume: 105, Nr. ( 1 ), p. ..
    https://doi.org/10.1111/jace.18212

  9. Evaluation of mechanical properties of a dense SiC/SiCN composite produced via PIP process
    Shi, Y., Süß, F., Horvath, J., Koch, D., Tushtev, K.,
    Journal of the European Ceramic Society , 2022
    Volume:  42, Nr. ( 3 ), p. ..
    https://doi.org/10.1016/j.jeurceramsoc.2021.11.009

  10. Evolution of damage in all‐oxide ceramic matrix composite after cyclic loading
    Kupsch, A., Laquai, R., Müller, B. R., Paciornik, S., Horvath, J., Tushtev, K., Rezwan, K., Bruno, G.,
    Advanced Engineering Materials , 2021
    Volume:  23, Nr. ( 9 ), p. 2100763
    https://doi.org/10.1002/adem.202100763

  11. Phase-field simulation of abnormal anisotropic grain growth in polycrystalline ceramic fibers
    Kundin, J., Almeida, R., Salama, H., Farhandi, H., Tushtev, K., Rezwan, K.,
    Computational Materials Science , 2020
    Volume:  185, Nr. ( 11 ), p. 109926
    https://doi.org/10.1016/j.commatsci.2020.109926

  12. All-oxide ceramic matrix composites (OCMC) based on low cost 3M Nextel 610 fabrics
    Pritzkow, W. E. C., Almeida, R., Mateus, L. B., Tushtev, K., Rezwan, K.,
    Journal of the European Ceramic Society , 2021
    Volume: 41, Nr. (5), p.10
    https://doi.org/10.1016/j.jeurceramsoc.2020.05.070

  13. Phase-field modeling of grain growth in presence of grain boundary diffusion and segregation in ceramic matrix mini-composites
    Kundin, J., Farhandi, H., Ganesan, K., P., Almeida, R., Tushtev, K., Rezwan, K.,
    Computational Materials Science , 2021
    Volume: 190, Nr. (), p.110295
    https://doi.org/10.1016/j.commatsci.2021.110295

  14. Joining oxide ceramic matrix composites by ionotropic gelation
    Saint Martin Almeida, R., Farhandi, H., Tushtev, K., Rezwan, K.,
    International Journal of Applied Ceramic Technology , 2020
    Volume: 17, Nr. (4), p.1574-1581
    https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/ijac.13507

  15. Damage analysis of 2.5D C/C-SiC composites subjected to fatigue loadings
    Almeida, R., Li, Y., Besser, B., Xiao, P., Zhou, W., Brückner, A., Langhof, N., Tushtev, K., Krenkel, W., Rezwan, K.,
    Journal of the European Ceramic Society, 2019
    Volume: 39, Nr. (7), p.2244-2250
    http://www.sciencedirect.com/science/article/pii/S0955221919300147

  16. Obtaining complex-shaped oxide ceramic composites via ionotropic gelation
    Almeida, R., Pereira, T., Tushtev, K., Rezwan, K.,
    Journal of the American Ceramic Society, 2018
    Volume: 102, Nr. (1), p.53-57
    https://doi.org/10.1111/jace.15990

  17. Interlaminar Shear Response of Carbon/Carbon in Torsion Tests
    Krause, T., Almeida, R., Volkmann, E., Tushtev K., Koch, D., Rezwan, K., Grathwohl, G,
    Journal of Ceramic Science and Technology, 2018
    Volume: 9, Nr. (), p.319-326
    https://doi.org/10.4416/JCST2018-00021

  18. On the Dimensional analysis for THE creep rate prediction of ceramic fibers
    Almeida, R., Al-Qureshi, Hazim A., Tushtev, K., Rezwan, K.,
    Ceramics International, 2018
    Volume: 44, Nr. (13), p.15924-15928
    http://www.sciencedirect.com/science/article/pii/S027288421831438X

  19. Strong and super tough: Layered ceramic‐polymer composites with bio‐inspired morphology
    Pogorelov, E., Tushtev, K., Arnebold, A., Koschek, K., Hartwig, A., Rezwan, K.,
    Journal of the American Ceramic Society, 2018
    Volume: 101, Nr. (10), p.4732-4742
    https://onlinelibrary.wiley.com/doi/abs/10.1111/jace.15717

  20. Thermal exposure effects on the long-term behavior of a mullite fiber at high temperature
    Almeida, R., Bergmüller, E., Lührs, H., Wendschuh, M., Clauß, B., Tushtev, K., Rezwan, K.,
    Journal of the American Ceramic Society, 2017
    Volume: 100, Nr. (9), p.4101-4109
    http://dx.doi.org/10.1111/jace.14922

  21. A New Clinically Relevant T-Score Standard to Interpret Bone Status in a Sheep Model
    Heiss, C., Kern, S., Malhan, D., Bocker, W., Engelhardt, M., Daghma, D. E. S., Stoetzel, S., Schmitt, J., Ivo, M., Kauschke, V., Lips, K. S., Tushtev, K., Rezwan, K., El Khassawna, T.,
    Med Sci Monit Basic Res, 2017
    Volume: 23, Nr. (), p.326-335
    http://www.ncbi.nlm.nih.gov/pubmed/28966340

  22. A novel, hydroxyapatite-based screw-like device for anterior cruciate ligament (ACL) reconstructions
    Schumacher, T., Tushtev, K., Wagner, U., Becker, C., große Holthaus, M., Hein, Sebastian B., Haack, J., Heiss, C., Engelhardt, M., El Khassawna, T., Rezwan, K.,
    The Knee, 2017
    Volume: 24, Nr. (5), p.933-939
    http://www.sciencedirect.com/science/article/pii/S0968016017301886

  23. Thermal Exposure Effects on the Strength and Microstructure of a Novel Mullite Fiber
    Almeida, R., Bergmüller, E. L., Eggert, B. G. F., Tushtev, K., Schumacher, T., Lührs, H., Clauß, B., Grathwohl, G., Rezwan, K.,
    Journal of the American Ceramic Society, 2016
    Volume: , Nr. (), p.
    http://dx.doi.org/10.1111/jace.14093

  24. Tensile and creep performance of a novel mullite fiber at high temperatures
    Almeida, R., Tushtev, K., Clauß, B., Grathwohl, G., Rezwan, K.,
    Composites Part A: Applied Science and Manufacturing, 2015
    Volume: 76, Nr. (0), p.37-43
    http://dx.doi.org/10.1016/j.compositesa.2015.05.013

  25. Assessment of three oxide/oxide ceramic matrix composites: Mechanical performance and effects of heat treatments
    Volkmann, E., Tushtev, K., Koch, D., Wilhelmi, C., Göring, J., Rezwan, K.,
    Composites Part A: Applied Science and Manufacturing, 2015
    Volume: 68, Nr. (0), p.19-28
    http://dx.doi.org/10.1016/j.compositesa.2014.09.013

  26. Influence of fiber orientation and matrix processing on the tensile and creep performance of Nextel 610 reinforced polymer derived ceramic matrix composites
    Volkmann, E., Tushtev, K., Koch, D., Wilhelmi, C., Grathwohl, G., Rezwan, K.,
    Materials Science and Engineering: A, 2014
    Volume: 614, Nr. (0), p.171-179
    http://dx.doi.org/10.1016/j.msea.2014.07.027

  27. Influence of the Matrix Composition and the Processing Conditions on the Grain Size Evolution of Nextel 610 Fibers in Ceramic Matrix Composites after Heat Treatment
    Volkmann, E., Barros, M. D., Tushtev, K., Pritzkow, W., Koch, D., Göring, J., Wilhelmi, C., Grathwohl, G., Rezwan, K.,
    Advanced Engineering Materials, 2014
    Volume: , Nr. (), p.
    http://dx.doi.org/10.1002/adem.201400220

  28. A novel bioinspired multilayered polymer-ceramic composite with outstanding crack resistance
    Tushtev, K., Gonsior, M., Murck, M., Grathwohl, G., Rezwan, K.,
    Advanced Engineering Materials, 2014
    Volume: 16, Nr. (2), p.156-160
    http://dx.doi.org/10.1002/adem.201300204

  29. Oxidation-induced microstructural changes of a polymer-derived Nextel™ 610 ceramic composite and impact on the mechanical performance
    Volkmann, E., Evangelista Lima, L., Tushtev, K., Koch, D., Wilhelmi, C., and Rezwan, K.,
    Journal of Materials Science, 2014
    Volume: 49, Nr. (2), p.710-719
    http://dx.doi.org/10.1007/s10853-013-7752-4

  30. Versagensverhalten eines Kohlenstoff-Faserverbundwerkstoffs unter Druckbeanspruchung
    Horvath, J., Tushtev, K., Grathwohl, G., Koch, D.,
    Materialwissenschaften und Werkstofftechnik, 2012
    Volume: 43, Nr. (11), p.924-930
    http://dx.doi.org/10.1002/mawe.201200842

  31. Interlaminar Mode I Crack Growth Energy Release Rate of Carbon/Carbon Composites
    Krause, T., Tushtev, K., Koch, D., Grathwohl, G.,
    Engineering Fracture Mechanics , 2013
    Volume: 100, Nr. (), p.38-51
    http://dx.doi.org/10.1016/j.engfracmech.2012.07.003

  32. Improvement of sound absorption and flexural compliance of porous alumina-mullite ceramics by engineering the microstructure and segmentation in topologically interlocked blocks
    Carlesso, M., Giacomelli; R., Krause, T., Molotnikov, A., Koch, D., Kroll, S., Tushtev, K., Estrin, Y., Rezwan, K.,
    Journal of the European Ceramic Society, 2013
    Volume: 33, Nr. (13-14), p.2549-2558
    http://dx.doi.org/10.1016/j.jeurceramsoc.2013.05.006

  33. Oxidation Kinetics and Its Impact on the Strength of Carbon Short Fiber Reinforced C/SiC Ceramics
    Shi, Y., Tushtev, K., Hausherr, J.-M., Koch, D., Rezwan, K.,
    Advanced Engineering Materials, 2013
    Volume: 15, Nr. (1-2), p.19-26
    http://dx.doi.org/10.1002/adem.201200130

  34. Enhancement of Sound Absorption Properties Using Topologically Interlocked Elements
    Carlesso, M., Molotnikov, A., Krause, T., Tushtev, K., Kroll, S., Rezwan, K., Estrin Y.,
    Scripta Materialia, 2012
    Volume: 66, Nr. (7), p.483-486
    http://dx.doi.org/10.1016/j.scriptamat.2011.12.022

  35. On the nature of the stiffness of nacre.
    Tushtev, K., Murck, M., Grathwohl, G.,
    Mat. Sci. Eng.: C, 2008
    Volume: 28 , Nr. (7), p.1164-72.
    http://dx.doi.org/10.1016/j.msec.2007.10.039

  36. Elastic properties of braided ceramic matrix composites.
    Tushtev, K., Koch, D., Grathwohl, G.,
    Int. J. Mater. Res. , 2008
    Volume: 99, Nr. (11), p.1262-1267
    http://dx.doi.org/10.3139/146.101761

  37. Ceramic fiber composites: Experimental analysis and modeling of mechanical properties
    Koch, D., Tushtev, K., Grathwohl, G.,
    Composites Science and Technology, 2008
    Volume: 68, Nr. (5), p.1165-1172
    http://dx.doi.org/10.1016/j.compscitech.2007.06.029

  38. Mechanismen und Modellierung der Verformung und Schädigung keramischer Faserverbundwerkstoffe
    Tushtev, K., Koch, D., Horvath, J., Grathwohl, G.,
    Int. J. Mat. Res. , 2006
    Volume: 97, Nr. (10), p.1460 - 1469
    http://www.ijmr.de/directlink.asp?MK101391

  39. Finite-Element-Simulation der nichtlinearen Verformung von Carbon/Carbon-Verbundwerkstoffen
    Tushtev, K., Koch, D.,
    Forschung im Ingenieurwesen , 2005
    Volume: 69, Nr. (4), p.216-222
    http://dx.DOI.org/10.1007/s10010-005-0005-1

  40. Evaluation of mechanical properties and comprehensive modeling of CMC with stiff and weak matrices
    Koch, D., Tushtev, K., Horvath, J., Knoche, R., Grathwohl, G.,
    Advances in Science and Technology, 2006
    Volume: 45, Nr. (), p.1435-1443
    http://dx.doi.org/10.4028/www.scientific.net/AST.45.1435

  41. Nacre properties in the elastic range. Influence of matrix incompressibility
    Dashkovskiy, S., Suhr, B., Tushtev, K., Grathwohl, G.,
    Comput. Mat. Sci. , 2007
    Volume: 41, Nr. (1), p.96-106
    http://dx.doi.org/10.1016/j.commatsci.2007.03.015

  42. Versagensverhalten keramischer Faserverbundwerkstoffe mit poröser Matrix - experimentelle Untersuchungen und Modellierung
    Tushtev, K., Horvath, J., Koch, D., Grathwohl, G.,
    Mat.-wiss. u. Werkstofftech. , 2004
    Volume: 35, Nr. (3), p.143-150
    http://dx.doi.org/10.1002/mawe.200300719

  43. Deformation and Failure Modelling of Fiber Reinforced Ceramics with Porous Matrix
    Tushtev, K., Horvath, J., Koch, D., Grathwohl, G.,
    Advanced Engineering Materials, 2004
    Volume: 6, Nr. (8), p. 664-669
    http://dx.doi.org/10.1002/adem.200400094