Milan Krkoska

Biography:

I started my study at the Department of Metallurgy, Technical University Kosice, Slovakia, in 1997. I joined the Material Engineering group and study the heat treatment and it's effect on the microstructure and performance of Cu-Zn-Al shape memory alloy systems as a possible replacement for more expensive Ni-Ti alloys. I defended my work and received the Ing. degree under supervision of Professor Ing. Svatoboj Longauer, CSc in 2002.

Then I moved to the United States and start working for the Center for Advanced Friction Studies (CAFS) in the R&D of carbon-carbon composite materials. I also managed to become a student, once again, with the support of the CAFS. I earned my Ms.C. degree at the Mechanical Engineering Department, Southern Illinois University at Carbondale, under supervision of Professor Peter Filip, PhD in 2007.

I joined the Netherlands Institute for Metal Research (new M2i: www.M2i.nl) in January 2008 and started to work on the project: "The application of marker loads for fatigue research using fractography". This is also my thesis topic at the TU Delft, where I am working toward the PhD degree under supervision of Professor Dr.ir.Rinze Bemedictus and dr.ir.Rene C. Alderliesten.

Research interests:

• Fracture mechanics
• Failure analysis
• (Stereo)Fractography
• Material science

Research project:

The main point of interest in my research project is to investigate the relationship between the loading conditions and the fracture surface features (fractography). Not only the identification of the surface features itself (qualitative description) but also the physical mechanisms that cause surface features formation are essential. For that matter, the crack extension is studied on “cycle-by-cycle” basis. This is an additional effort to common engineering practice in which the averaging of several cracks/blocks extension is used. Particularly the formation of striations, crack path change and fissure/depression formation are the points of interest (see examples of fracture features in figures bellow). The study is aiming to its ultimate goal: develop the useful concept in marker loads technology employing overloads, underloads and/or block of loads that could be successively used by industry and academic world.  

Teaching:

Besides being actively conducting the research part, I am also involved in teaching activities. I’ve been acting as an instructor for AE2-702P course (@ the aerospace engineering faculty). Students are given the task of designing, manufacturing and testing the structural joints. They are requested to write the technical report and to defend they approach, results and analysis during the meeting with instructors.   

Another teaching activity that I will be also part of is currently in preparation stage (AE2200: Test, analysis and simulation). The project’s high-level learning objectives will be:

• Analyze an experimental set-up or simulation model and assess its performance with regards to answering the posed research question;
• Analyze experimental and/or model results;
• Draw conclusions with the aim of answering a research question;
• Write a research report and present the research 

Publications:

• Krkoska M., White P., Barter S.A., Alderliesten R.C. and Benedictus R.: Fatigue crack paths in AA2024-T3 alloy when loaded with constant amplitude and simple underloads spectra, Engineering Fracture Mechanics (2010).
• Krkoska M., Alderliesten R.C., Barter S.A., Benedictus R. and White P.: Fatigue Crack Paths in AA2024-T3 and AA7050-T7451 Treatment When Loaded with Simple Underloads Spectra, International conference on Crack Path (CP 2009) September 2009, Vicenza, Italy.
• Krkoska M., Alderliesten R.C. and Benedictus R.: On the Crack Growth Behavior under Simple Compressive Loads of 2024-T3 Aluminium Alloy, the 31st International Committee on Aeronautical Fatigue (ICAF 2009), May 2009, Rotterdam, the Netherlands.
• A.Elhomani, K.Farhang, M.Krkoska: A Lumped Parameter Model for prediction of Temperature in Disk Pair in Dry Friction Contact, Proceeding of the STLE/ASME International Joint Tribology Conference, IJTC2007-44459, San Diego , California (2007)
• K.Peszynska-Bialczyk, K.B. Anderson, T. Szymanski, M.Krkoska, P. Filip: Thermal Analysis of Bulk Carbon-Carbon Composite and Friction Products Derived From it during Simulated Aircraft Braking, CARBON 45, 524-530 (2007).
• M.Krkoska, K.Peszynska-Bialczyk, P.Filip,: The Frictional Performance of Carbon-Carbon Composite Material in the Presence of Hydraulic Fluid, Runway Deicer Agent, Aircraft Deicer Agent, Hydraulic Fluid and Sea Salt Water; The American Ceramic Society, Ceramic Engineering and Science Proceedings, 27, 653-664 (2006).
• D.E.Wittmer, S.Ozcan, M.Krkoska, P.Filip: Effect of Heat Treatment on Crystal Structure and Wear Performance of Carbon-Carbon Composites, The American Ceramic Society,Ceramic Engineering and Science Proceedings, 27, 665-675 (2006).
• S.Ozcan, M.Krkoska and P.Filip:  Frictional Performance and Local Properties of C/C composites, Development in Advanced Ceramic and Composites, Eds; M. Brito, P. Filip, C. Lewinsohn, A. Sayir, M. Opeka, W. M. Mullins, (ISBN 1-57498-261-3), The American Ceramic Society, pp. 127-138 (2005).
• M.Krkoska and P.Filip: Humidity  and Frictional Performance  of C/C Composites, Development in Advanced Ceramic and Composites, Eds; M. Brito, P. Filip, C. Lewinsohn, A. Sayir, M. Opeka, W. M. Mullins, (ISBN 1-57498-261-3), The American Ceramic Society, pp. 139-155 (2005).
• K.Peszynska-Bialczyk, M.Krkoska, A.Pawliczek, P.Filip and K.Anderson: Study of Adsorption/Desorption Phenomenon of Friction Debris on Aircraft Brakes, Development in Advanced Ceramic and Composites, Eds; M. Brito, P. Filip, C. Lewinsohn, A. Sayir, M. Opeka, W. M. Mullins, (ISBN 1-57498-261-3), The American Ceramic Society, pp. 157-166 (2005).
• S.Longauer, M.Vojtko, M.Longauerova, M.Krkoska: Microstructure Effects of Martensite Stabilization in CuZnAl Shape Memory Alloy, 9 Conference: Prinos metalografie pro reseni vyrobnuch problemu, Lazne Libverda Czech Republic, pp 297-300 (2002).