Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
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Dynamic Interface Crack Propagating Along a Line Between Two Holes

  • Lee, Ouk-Sub (School of Mechanical, Aerospace and Automation Engineering, Inha University) ;
  • Park, Jae-Chul (School of Mechanical, Aerospace and Automation Engineering, Inha University) ;
  • Yin, Hai-Long (School of Mechanical, Aerospace and Automation Engineering, Inha University) ;
  • Byun, Kwi-Hwan (School of Mechanical, Aerospace and Automation Engineering, Inha University)
  • Published : 2001.02.01
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Abstract

The effects of the interface and two holes located near the crack path in the hybrid specimen on the dynamic crack propagation behavior have been investigated using dynamic photoelasticity with the aid of Cranz-Shardin type high speed camera system. The dynamic stress field around the dynamically propagating interface crack tip in the three point bending specimens under a dynamic load applied by a hammer dropped from 0.6m high without initial velocity are recorded. The complex stress intensity factors for the dynamically propagating interface crack are extracted by using a overdeterministic least square method. Theoretical dynamic interface isochromatic fringe loops generated by using the numerically determined complex stress intensity factors are compared with the experimental results. Furthermore, the influence of the hole to the dynamic interface crack velocities has been investigated experimentally.

Keywords

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