Alexandros Theocharis

Alexandros Theocharis is a Diploma Civil Engineer from the National Technical University of Athens (2011). He holds an MSc in Applied Mechanics (2015) and a PhD in Geomechanics (2017), both from the same institution.

He has served as a postdoctoral researcher at the National Technical University of Athens, École des Ponts ParisTech (France), the Democritus University of Thrace, and the National Centre for Research and Technology Development. He was also awarded a postdoctoral research fellowship by the State Scholarships Foundation of Greece. From 2024 to 2026, he served as Assistant Professor in the Department of Civil Engineering at the University of Patras.

His research interests focus on geomechanics and geotechnical engineering, computational and numerical analysis using both discrete and continuum methods, micromechanics and the constitutive behavior of geomaterials, unsaturated soil mechanics, as well as the stability and resilience assessment of geotechnical structures and infrastructure under environmental and climatic effects.

He has actively participated in numerous European and national research projects, including projects funded by the European Research Council (ERC), the Research Fund for Coal and Steel, and COST Actions, focusing on the mechanical behavior of geomaterials, geotechnical analysis of post-mining areas, and geotechnical risk assessment.

His publication record includes more than 20 papers in international peer-reviewed journals and numerous contributions to international and national conference proceedings. He serves as a reviewer for international journals in geotechnical engineering and is a member of international scientific and professional organizations in the field.

Google Scholar: https://scholar.google.com/citations?user=LT3bQy0AAAAJ

ORCID: https://orcid.org/0000-0002-1989-1195

1. Theocharis, A. I., Gaidajis, G., Zevgolis, I. E. (2025). Geotechnical Experimental Study of Phosphogypsum for Use in Quarry Reclamation, Minerals, 15(5), 477. https://doi.org/10.3390/min15050477


2. Mikroutsikos, A., Theocharis, A. I., Koukouzas, N. C., Zevgolis, I. E. (2024). Slope stability of reclaimed coal mines through a new water filling index. Journal of Rock Mechanics and Geotechnical Engineering, 16(3), 828-839. https://doi.org/10.1016/j.jrmge.2023.08.022


3. Theocharis, A. I., Zevgolis, I. E., Roumpos, C., Koukouzas, N. C. (2024). Probability distributions of geotechnical properties for heterogeneous lignite mine spoils. International Journal of Geotechnical Engineering, 18(5), 528-536. https://doi.org/10.1080/19386362.2024.2398328


4. Theocharis, A. I., Zevgolis, I. E., Deliveris, A., Karametou R., Koukouzas N. (2022). From Climate Conditions to the Numerical Slope Stability Analysis of Surface Coal Mines. Applied Sciences, 12, 1538. https://doi.org/10.3390/app12031538


5. Zevgolis, I. E., Theocharis, A. I., Deliveris, A. V., Koukouzas, N. C., Roumpos, C., Marshall, A. M. (2021). Geotechnical Characterization of Fine-Grained Spoil Material from Surface Coal Mines. Journal of Geotechnical and Geoenvironmental Engineering, 147(7), 04021050. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002550


6. Theocharis, A., Roux, J. N., Langlois, V. (2020). Elasticity of model weakly cemented granular materials: A numerical study. International Journal of Solids and Structures, 193, 13-27. https://doi.org/10.1016/j.ijsolstr.2020.02.005


7. Theocharis, A. I., Vairaktaris, E., Dafalias, Y. F., Papadimitriou, A. G. (2019). Necessary and sufficient conditions for reaching and maintaining critical state. International Journal for Numerical and Analytical Methods in Geomechanics, 43(12), 2041-2055. https://doi.org/10.1002/nag.2943


8. Theocharis, A. I., Vairaktaris, E., Dafalias, Y. F., Papadimitriou, A. G. (2017). Proof of Incompleteness of Critical State Theory in Granular Mechanics and Its Remedy. Journal of Engineering Mechanics, 143(2), 04016117. https://doi.org/10.1061/(ASCE)EM.1943-7889.0001166