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ELIÁŠ, J. BAŽANT, Z.
Originální název
Fracturing in concrete via lattice-particle model
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
Numerical simulation is used to explore the behavior of concrete beams of different sizes and different notch lengths, loaded in three-point bending. The entire range of notch depth is studied. One limit case is type 1 fracture, which occurs when the notch depth is zero and the crack initiates from a smooth surface (this is the case of the modulus of rupture test). Another limit is type 2 fracture, which occurs for deep enought notches. Both cases exhibit very different size effects. The fracture is simulated numerically with a robust mesolevel lattice-particle model. The results shed light on the transitional behavior in which the notch depth is non-zero but not deep enough for develeping the the type 2 size effect dominated by energy release from the structure. In agreement with experimental observations and theoretical predictions, the numerical results show evidence of a decreasing macroscopic fracture energy as the ligament gets very short.
Klíčová slova
Fracture, concrete, lattice-particle model, size effect, notch variability
Autoři
ELIÁŠ, J.; BAŽANT, Z.
Rok RIV
2011
Vydáno
26. 10. 2011
Místo
Barcelona
ISBN
978-84-89925-69-4
Kniha
2nd International Conference on Particle-Based Methods - Fundamentals and Applications (PARTICLES 2011)
Strany od
1
Strany do
12
Strany počet
BibTex
@inproceedings{BUT89512, author="Jan {Eliáš} and Zdeněk P. {Bažant}", title="Fracturing in concrete via lattice-particle model", booktitle="2nd International Conference on Particle-Based Methods - Fundamentals and Applications (PARTICLES 2011)", year="2011", pages="1--12", address="Barcelona", isbn="978-84-89925-69-4" }