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Effect of Radial Confinement on Wave Propagation and Vibrational Response in Bars

  • Jacob C. DodsonEmail author
  • Jason R. Foley
  • Janet C. Wolfson
  • Jonathan Hong
  • Vincent Luk
  • Alain Beliveau
  • Alexander Idesman
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

It is currently beyond the state-of-the art to accurately predict the instantaneous dynamic response of a structure with rapidly changing boundary conditions. In order to establish a basic understanding of changing boundary conditions, we examine the wave propagation through a bar subject to mechanical confinement. The Air Force Research Laboratory has conducted several experiments investigating the effect of non-traditional boundary conditions, such as mid-structure confinement, on the local and global dynamic response of rods using a modified Hopkinson Bar configuration with radial clamping. We have shown that the wave velocity in the mechanically clamped area is significantly lower than that in a stress free bar. This paper presents the experimental results and analytical modeling of the effect of radial confinement on dynamic response in bars.

Keywords

Wave propagation Confined effects Hopkinson bar Dispersion Experimental mechanics 

Notes

Acknowledgements

The authors would like to thank AFOSR (Program Manager: Dr. David Stargel) and the Air Force Research Laboratory for supporting this research effort. Opinions, interpretations, conclusions, and recommendations are those of the authors and are not necessarily endorsed by the United States Air Force.

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Copyright information

© The Society for Experimental Mechanics, Inc. 2015

Authors and Affiliations

  • Jacob C. Dodson
    • 1
    Email author
  • Jason R. Foley
    • 1
  • Janet C. Wolfson
    • 1
  • Jonathan Hong
    • 2
  • Vincent Luk
    • 2
  • Alain Beliveau
    • 2
  • Alexander Idesman
    • 3
  1. 1.Air Force Research Laboratory/RWMFValparaisoUSA
  2. 2.Applied Research AssociatesValparasioUSA
  3. 3.Texas Tech UniversityLubbockUSA

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