Detail publikace

Discrete Modeling of Strain Rate Effect in Concrete Fracture

KVĚTOŇ, J. ELIÁŠ, J.

Originální název

Discrete Modeling of Strain Rate Effect in Concrete Fracture

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Concrete fracture can be simulated in static regime, however, it is a dynamical process. For very slow loading rates, the kinetic energy is negligible compared to the energy dissipated by fracturing, and the influence of inertia can be neglected. In all other cases, neglecting the influence of inertia forces can lead to improper results. With increasing loading rate, increase in strength and energy dissipation as well as changes in crack pattern can be observed. The contribution presents dynamical simulations of experiments on concrete specimens under various displacement rates, from very slow, quasi-static, to high displacement rates. The simulations are calculated using discrete particle model, the material is represented by a system of interconnected ideally rigid polyhedral particles. The solution of equations of motion is calculated using implicit time integration Newmark scheme. The constitutive behavior of the material is strain rate independent. For high strain rates the influence of inertia forces dominates and is mainly responsible for increase in loading forces as well as for change in the crack pattern and crack branching. The results obtained with the model are compared to experimental data from literature.

Klíčová slova

Discrete model, Concrete fracture, Dynamics, Inertia, Strain Rate

Autoři

KVĚTOŇ, J.; ELIÁŠ, J.

Vydáno

1. 9. 2017

ISSN

1662-9795

Periodikum

Key Engineering Materials (web)

Ročník

754

Číslo

1

Stát

Švýcarská konfederace

Strany od

345

Strany do

348

Strany počet

4

BibTex

@inproceedings{BUT141116,
  author="Josef {Květoň} and Jan {Eliáš}",
  title="Discrete Modeling of Strain Rate Effect in Concrete Fracture",
  booktitle="Key Engineering Materials",
  year="2017",
  journal="Key Engineering Materials (web)",
  volume="754",
  number="1",
  pages="345--348",
  doi="10.4028/www.scientific.net/KEM.754.345",
  issn="1662-9795"
}