Analysis of compressive deformation behaviors of aluminum alloy using a split hopkinson pressure bar test with an acoustic emission technique

Jong Tak Kim, Sung Choong Woo, Jae Sakong, Jin Young Kim, Tae Won Kim

Research output: Contribution to journalArticle

Abstract

In this study, the compressive deformation behaviors of aluminum alloy under high strain rates were investigated by means of a SHPB test. An acoustic emission (AE) technique was also employed to monitor the signals detected from the deformation during the entire impact by using an AE sensor connected to the specimen with a waveguide in real time. AE signals were analyzed in terms of AE amplitude, AE energy and peak frequency. The impacted specimen surface and side area were observed after the test to identify the particular features in the AE signal corresponding to the specific types of damage mechanisms. As the strain increased, the AE amplitude and AE energy increased whereas the AE peak frequency decreased. It was elucidated that each AE signal was closely associated with the specific damage mechanism in the material.

Original languageEnglish
Pages (from-to)891-897
Number of pages7
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume37
Issue number7
DOIs
Publication statusPublished - 2013 Jul

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Keywords

  • Acoustic Emission
  • Deformation Behavior
  • Impact
  • SHPB
  • Strain Rate

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