Experimental and numerical study of wave propagation in granular media

T. On, K. J. Smith, P. H. Geubelle, J. Lambros, A. Spadoni, C. Daraio

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

One dimensional stress waves travelling in granular chains exhibit interesting characteristics such as filtering, tunability and wave mitigation because on the formation of solitary waves, and solitary wave trains, within them. An idealized one dimensional granular medium, consisting of a linear array of contacting spherical brass beads, was loaded dynamically in a modified split Hopkinson pressure bar, with loading pulses that span a variety of rates and profiles using pulse shaping techniques. Different chain lengths were studied to determine how solitary waves form in a varying length granular medium, as well as the speed of wave propagation. It is found that the wave speed propagates faster for longer chains of brass beads. The high loading rates of the Hopkinson bar also allowed us to investigate plastic dissipation effects in the granular chain when composed of different types of metals. To further our understanding of wave propagation in ductile ordered granular media, the experimental results are compared with companion numerical simulations based on a particle contact law that accounts for plastic dissipation. Knowing the behavior of a stress wave propagating through such materials can lead to arrangements that can produce desired stress wave mitigation characteristics as the waves travel through the granular chain.

Original languageEnglish (US)
Title of host publicationDynamic Behavior of Materials - Proceedings of the 2011 Annual Conference on Experimental and Applied Mechanics
PublisherSpringer New York LLC
Pages95-98
Number of pages4
ISBN (Print)9781461402152
DOIs
StatePublished - Jan 1 2011
Event2011 SEM Annual Conference on Experimental and Applied Mechanics - Uncasville, CT, United States
Duration: Jun 13 2011Jun 16 2011

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
Volume1
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652

Other

Other2011 SEM Annual Conference on Experimental and Applied Mechanics
CountryUnited States
CityUncasville, CT
Period6/13/116/16/11

ASJC Scopus subject areas

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

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