Unifying Impacts in Granular Matter from Quicksand to Cornstarch

A sharp transition between liquefaction and transient solidification is observed during impact on a granular suspension depending on the initial packing fraction. We demonstrate, via high-speed pressure measurements and a two-phase modeling, that this transition is controlled by a coupling between t...

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Bibliographic Details
Published in:Physical review letters 2016-08, Vol.117 (9), p.098003-098003, Article 098003
Main Authors: Jerome, J John Soundar, Vandenberghe, Nicolas, Forterre, Yoël
Format: Article
Language:English
Subjects:
Coupling
Drying
Fluid pressure
Hardening
High speed
Interstitials
Liquefaction
Physics
Solidification
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Summary:A sharp transition between liquefaction and transient solidification is observed during impact on a granular suspension depending on the initial packing fraction. We demonstrate, via high-speed pressure measurements and a two-phase modeling, that this transition is controlled by a coupling between the granular pile dilatancy and the interstitial fluid pressure generated by the impact. Our results provide a generic mechanism for explaining the wide variety of impact responses in particulate media, from dry quicksand in powders to impact hardening in shear-thickening suspensions like cornstarch.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.117.098003