10th International Congress of the Serbian Society of Mechanics (18-20. 06. 2025, Niš) [pp. 118-123]
AUTHOR(S) / АУТОР(И): Vladimir Lj. Dunić 
, Miroslav M. Živković , Dragan M. Rakić , Vladimir P. Milovanović
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DOI: 10.46793/ICSSM25.118D
ABSTRACT / САЖЕТАК:
Simulation of concrete structures behavior is very popular in engineering design, as the concrete is the most used the material in the world. The possibilities are related to the development of Finite Element Method (FEM) based software and the possibility to implement advanced constitutive models or computational mechanics methods which can provide satisfying results. The most popular concrete constitutive model available in many FEM software is Concrete Damage Plasticity (CDP) model which takes into account both tension and compression response, as well as damage field which can be considered as the level of stiffness decrease in the material. Another approach is a Phase-Field Damage Model (PFDM) which found application in recent years in modeling response of various materials exposed to extreme loading conditions. In this paper, the Drucker-Prager constitutive model is enhanced to compute a strain energy which produces damage in material under the certain conditions. The damage is considered as the additional degree of freedom in 3D solid element, where the threshold value of a critical total strain energy is declared as the limit quantity. The functionality of the proposed approach is considered by comparison of experimental and simulation results for uniaxial compression test.
KEYWORDS / КЉУЧНЕ РЕЧИ:
phase-field damage model, Drucker-Prager, concrete, uniaxial compression experiment
ACKNOWLEDGEMENT / ПРОЈЕКАТ:
This research was supported by the Science Fund of the Republic of Serbia, #GRANT No 7475, Prediction of damage evolution in engineering structures – PROMINENT and by the Ministry of Science, Technological Development and Innovation, Republic of Serbia, Agreement No. 451-03-137/2025-03/200107.
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