Measuring high speed crack propagation in concrete fracture test using mechanoluminescent material

Wha Jung Kim, Jae Min Lee, Ji Sik Kim, Chang Joon Lee

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Measuring crack length in concrete fracture test is not a trivial problem due to high speed crack propagation. In this study, mechanoluminascent (ML) material, which emits visible light under stress condition, was employed to visualize crack propagation during concrete fracture test. Three-point bending test was conducted with a notched concrete beam specimen. The cracking images due to ML phenomenon were recorded by using a high speed camera as a function of time and external loadings. The experimental results successfully demonstrated the capability of ML material as a promising visualization tool for concrete crack propagation. In addition, an interesting cracking behavior of concrete bending fracture was observed in which the crack propagated fast while the load decreased slowly at early fracture stage.

Original languageEnglish
Pages (from-to)547-555
Number of pages9
JournalSmart Structures and Systems
Volume10
Issue number6
DOIs
StatePublished - Dec 2012

Keywords

  • Concrete fracture
  • Cracking images
  • High speed crack detection
  • Mechanoluminescence
  • Threepoint bending test

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