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Numerical Study of Dynamic Behaviors of Concrete Under Various Strain Rates

Authors
  • An, H.M.1
  • Liu, L.2
  • 1 Faculty of Public Security and Emergency Management, 650093 , (China)
  • 2 Faculty of Land Resource Engineering, 650093 , (China)
Type
Published Article
Journal
Archives of Civil Engineering
Publisher
Sciendo
Publication Date
Dec 01, 2019
Volume
65
Issue
4
Pages
21–36
Identifiers
DOI: 10.2478/ace-2019-0044
Source
De Gruyter
Keywords
License
Green

Abstract

As the dynamic behavior of the concrete is different from that under static load, this research focuses on the study of dynamic responses of concrete by simulating the split Hopkinson pressure bar (SHPB) test. Finite element code LS-DYNA is used for modeling the dynamic behaviors of concrete. Three continuous models are reviewed and the Holmquist-Johnson-Cook model (HJC) is introduced in detail. The HJC model which has been implemented in LS-DYNA is used to represent the concrete properties. The SHPB test model is established and a few stress waves are applied to the incident bar to simulate the dynamic concrete behaviors. The stress-strain curves are obtained. The stress distributions are analyzed. The crack initiation and propagation process are described. It is concluded that: the HJC model can modeling the entire process of the fracture initiation and fragmentation; the compressive of the concrete is significantly influenced by the strain rates.

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