Prof. Ferenc Kun | Fracture and Fragmentation | Best Paper Award

Higher Education, University of Debrecen, Hungary

Professor Ferenc Kun (b. November 13, 1966) is a full professor at the Department of Theoretical Physics, University of Debrecen. He earned his PhD in 1998 and habilitated in 2006. In 2010, he received the Doctor of the Hungarian Academy of Sciences (HAS) degree. He was elected as a corresponding member of the Hungarian Academy of Sciences (MTA) in 2019 and as an ordinary member in 2025. Over his career, he has gained a global reputation as a leading expert in statistical physics—particularly in the fracture and fragmentation of materials. He has authored over 150 scientific papers, 125 of which appeared in peer-reviewed journals, amassing more than 3,200 independent citations and an h‑index of 32. He is head of the Doctoral School of Physics at Debrecen and contributes to the broader academic community through editorial duties, peer review, and organizing key international conferences.

Professional Profile

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• ORCID

🎓 Education

Ferenc Kun’s academic journey began with studies in physics at the University of Debrecen, culminating in a PhD in Theoretical Physics in 1998. His doctoral work laid the foundation for a distinguished career in material-failure modeling. After his PhD, he pursued habilitation—a process leading to a formal qualification for university teaching and thesis supervision—completing it in 2006. His research, combining rigorous analytical methods with computational modeling, earned him the title of “Doctor of the Hungarian Academy of Sciences” (HAS) in 2010. He subsequently engaged in postdoctoral research via international fellowships in Germany and France, enriching his methodological repertoire in statistical and computational physics. These formative educational and early-career experiences shaped his approach to complex systems and material science, setting the stage for his development into a global leader in the statistical physics of fracture and fragmentation.

💼 Experience

Over his professional career, Professor Kun has steadily advanced through academic ranks to full professorship at the University of Debrecen. He has directed multiple national and European research projects, serving as principal investigator. His international experience includes fellowships in Germany and France, promoting cross-border scientific exchange. At Debrecen, he leads the Doctoral School of Physics and acts as associate editor of Frontiers in Physics – Interdisciplinary Physics and referee for numerous top-tier journals. Further, he organizes prominent conferences—e.g., “Particles” and “CFRAC”—on fracture and fragmentation. His supervision has extended to master’s, PhD, and postdoctoral researchers worldwide. He consistently integrates advanced computational techniques—like fiber-bundle models and discrete-element models—into theoretical and practical investigations, demonstrating his commitment to training the next generation of scientists while advancing his field empirically and methodologically.

🔬 Research Focus 

Professor Kun’s research centers on the statistical and computational modeling of material failure and fragmentation, from the nanoscale to geological scales. He is an expert in fiber-bundle models, which simulate ensembles of interacting elements under load, and discrete element methods that track particle-by-particle breakage. His work explores how complex systems fracture—a process governed by statistical scaling laws and universality classes. A key interest is the dynamic fragmentation of structures, such as the explosive cracking of rings, where he investigates how strain rate and geometry govern crack-pattern transitions and fragment size distributions. He has systematically mapped phase diagrams linking control parameters to fragmentation regimes. Other interests include crackling noise in porous rocks, anisotropic crack development in shrinking layers, and failure avalanches in networked systems. His integrated theoretical-experimental approach informs applications in materials design, structural safety, and even space-debris mitigation.

📚 Publication Top Notes

1. “Control of fragment sizes of exploding rings.”
   Simulations of explosive ring fragmentation in 2D show a strain‑rate–induced dimensional crossover in crack patterns. By mapping out phase diagrams over strain rate and thickness, the study reveals scaling laws that enable tuning fragmentation regimes. Highlights theoretical contributions to fracture physics and practical implications for debris control.

2. “Failure process of fiber bundles with random misalignment,” Phys. Rev. Research (2024‑09‑27), DOI 10.1103/PhysRevResearch.6.033344
   Co-authored with Allan, Batool, Danku, and Pál. Investigates how misalignment in fibers affects failure dynamics via computational modeling, offering insights into structural reliability of complex systems at various scales.

3. “Discrete element model for the anisotropic cracking of shrinking material layers,” Int. J. Solids Struct. (2024‑08), DOI 10.1016/j.ijsolstr.2024.112890
   With Szatmári, Halász, Nakahara, and Kitsunezaki. Presents a DEM of anisotropic shrinkage cracking, explaining pattern formation in constricting layers—a key issue in materials and geological processes.

4. “Effect of the loading condition on the statistics of crackling noise … porous rocks,” Royal Society Open Science (2023‑11), DOI 10.1098/rsos.230528
   Szuszik, Main, and Kun analyze acoustic emissions during rock failure under varied loading, revealing how stress conditions influence crackling‑noise statistics — relevant for seismology and geostructure assessment.

5. “Size scaling of failure strength at high disorder,” Physica A (2023‑08), DOI 10.1016/j.physa.2023.128994
   With Danku and Pál. Studies how disorder level affects material strength scaling, bridging statistical physics and materials engineering for disordered solids.

6. “Temporal evolution of failure avalanches of the fiber bundle model … complex networks,” Chaos (2022‑06), DOI 10.1063/5.0089634
   Batool, Danku, Pál, Kun. Explores burst events (“avalanches”) in fiber bundles tied via complex network architectures—linking network topology with failure dynamics.

7. “Approach to failure through record breaking avalanches … heterogeneous stress field,” Physica A (2022‑05), DOI 10.1016/j.physa.2022.127015
   Kádár, Danku, Pál, Kun. Identifies record-breaking events during stress-driven failure, advancing theoretical tools for predicting catastrophic breakdown in disordered systems.

8. “Evolution of anisotropic crack patterns in shrinking material layers,” Soft Matter (2021), DOI 10.1039/D1SM01193F
   Szatmári, Halász, Nakahara, Kitsunezaki, Kun. Combines simulation and theory to describe directional cracking in drying/shrinking films—relevant to both material coating and geological weathering.

9. “Curvature flows, scaling laws and the geometry of attrition under impacts,” Scientific Reports (2021‑12), DOI 10.1038/s41598-021-00030-1
   Studied shape evolution and wear in spheres under repeated impacts, deriving curvature‑based scaling laws for attrition—a cross-disciplinary mechanics result.

10. “Stick‑Slip Dynamics in Fiber Bundle Models …” and “Editorial: The Fiber Bundle,” Frontiers in Physics (2021)
    *Kun authored both a research article on stick–slip failure and a thematic editorial, establishing thought leadership in fiber bundle modeling.

    🏁 Conclusion

    Professor Ferenc Kun is exceptionally well-qualified for a Research for Best Paper Award, particularly with the nominated paper on controlling fragmentation via strain-rate tuning. His contribution stands out due to:

    • Its technical depth and theoretical rigor,

    • The practical applicability of the findings,

    • A strong history of scholarly productivity, and

    • His recognized leadership in the global fracture and statistical physics community.