Accession Number:



Jamming / Unjamming Dynamics in Granular Materials

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Technical Report,01 May 2012,30 Apr 2015

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University of Chicago Chicago United States

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Granular materials can exhibit both solid-like jammed and liquid-like unjammed behavior. The project investigates the role of local, particle scale properties in affecting the overall response to applied stresses as the jamming transition is crossed. It extends the current understanding of the jamming transition by focusing on aspects that allow for control of the dynamic interactions among particles, in particular particle shape and interstitial fluids. This is of fundamental interest for developing accurate models for the onset or demise of mechanical rigidity, and it also provides a path toward engineering new classes of particulate materials with properties by design. Scientific accomplishments include i the investigation of dynamic jamming fronts that drive the impact-induced jamming of dense suspensions, ii the development of a new computer-aided method for identifying optimized particle shapes via evolutionary algorithms, and iii the development of a high speed ultrasound imaging system for non-invasive three-dimensional imaging of dense suspensions.

Subject Categories:

  • Miscellaneous Materials
  • Mechanics

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