Monitoring of the fracture mechanisms induced by pull-out and compression in concrete

A. C. Mpalaskas, I. Vasilakos, T. E. Matikas, H. K. Chai, D. G. Aggelis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

In-situ characterization of strength is of paramount importance for concrete engineers. To get an estimation of the compressive strength, slightly destructive tests are conducted on the surface of the material. One is the LOK test (pull-out) which offers a reliable estimation of compressive strength. The developed stress field is quite complicated and researchers have argued about the nature of the fracture mechanism. In the present paper, acoustic emission (AE) is applied during both compression and pull-out experiments on concrete cubes. Results show that the two damage modes emit different AE signatures, with compression leading to higher frequencies and pull-out to longer signal durations, while the finite element method (FEM) is used to analyze the stress field. Identification of the active damage mode in real time, is beneficial in order to assess the condition of integrity of concrete in structures by nondestructive monitoring.

Original languageEnglish
Pages (from-to)219-230
Number of pages12
JournalEngineering Fracture Mechanics
Volume128
Issue numberC
Early online date29 Jul 2014
DOIs
Publication statusPublished - Sept 2014

Keywords / Materials (for Non-textual outputs)

  • Acoustic emission
  • Compression
  • Finite elements
  • Fracture mode
  • Nondestructive testing
  • Pull-out
  • Structural health monitoring

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