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Assοciate Professor

Tel. : +3024210-7-4155

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George Efremidis is Associate Professor in the Division of Geotechnical and Geoenvironmental Engineering of the Civil Engineering Department with the subject "Rock Mechanics". His research interests include: Mechanical behavior of intact rock and rock masses (constitutive laws, gradient theories of elastoplasticity, scale / size effects, discontinuities, microstructure), geostatic stresses, underground constructions in rocks, stability of rock slopes, geological hazards. Mr. Efremidis teaches undergraduate courses: Geology for Engineers, Engineering Geology and Rock Mechanics, Deep Foundations and Retaining Diaphragms. He also teaches the postgraduate course: Prevention, management and restoration of impacts of natural disasters and climate change on the built environment. He has supervised 22 diploma theses and 9 postgraduate diploma theses. He is an academic coordinator on 2 Erasmus + bilateral agreements with the Politecnico di Torino. He has published 35 articles in scientific journals and conferences.

Undergraduate Courses
- Geology for Engineers
- Engineering Geology and Rock Mechanics
- Deep Foundations and Retaining Diaphragms

Graduate Courses
- Geological and geotechnical design parameters of civil engineering projects against geohazards

Office Hours
Tuesday, 14:00-16:00
Wednesday, 16:00-18:00



Degree in Geology,  Aristotle University of Thessaloniki (AUT), Department of Geology (1990)
M.Sc., Technical University of Crete (TUC), Department of Mineral Resources Engineering, Sector of Mining Technology,Laboratory of Rock Mechanics(1997)
Doctoral degree, Department of Civil Engineering, Aristotle University of Thessaloniki, Greece (2002)

Recent Publications

1. Sapora A., Efremidis G., and Cornetti P., “Non-local criteria for the borehole problem: Gradient Elasticity versus Finite Fracture Mechanics”, Meccanica, doi: 10.1007/s11012-021-01376-6, (2021).
2. Sapora A., Efremidis G., and Cornetti P., “Comparison between two nonlocal criteria: A case study on pressurized holes”, Procedia Structural Integrity 33, 456–464, doi: 10.1016/j.prostr.2021.10.052, (2021).
3. Efremidis G., and Tsagrakis I., "A new gradient elasticity model for the elastic boreholes", ISRM International Symposium EUROCK 2021 – Mechanics and Rock Engineering, from Theory to Practice 20-25 September 2021, Turin, Italy, IOP Conference Series: Earth and Environmental Science, Volume 833, doi: 10.1088/1755-1315/833/1/012188, (2021).
4. Efremidis G., Tsagrakis I., and Aifantis E.C., "An elastoplastic axisymmetric borehole problem using a deformation theory of gradient plasticity", Geomechanics and Geoengineering – An International Journal, doi: 10.1080/17486025.2020.1827160, (2020).
5. Efremidis G., Chen H., Tsagrakis I., Aifantis E.C., Qi Ch., “Circular tunnel in a gradient elastoplastic rock mass”, 14th International Congress on Rock Mechanics and Rock Engineering (ISRM), (ID 14362), Iguassu Falls, Brazil (2019).
6. Chen H., Qi Ch., Efremidis G., Dorogov M., Aifantis E. C., “Gradient elasticity and size effect for the borehole problem”, Acta Mechanica 229, pp. 3305-3318, (2018).
7. Efremidis, G., Avlonitis, M., Konstantinidis, A. and Aifantis, E.C., “A statistical study of precursor activity in earthquake-induced  landslides”, Computers and Geotechnics 81, pp. 137-142, (2017).