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Proc Natl Acad Sci U S A. 2012 Jul 3;109(27):10806-10. doi: 10.1073/pnas.1121596109. Epub 2012 Jun 11.

Electrostatic precursors to granular slip events.

Author information

  • 1Department of Biomedical Engineering, Rutgers University, Piscataway, NJ 08854, USA. shinbrot@rutgers.edu

Abstract

It has been known for over a century that electrical signals are produced by material failure, for example during crack formation of crystals and glasses, or stick-slip motion of liquid mercury on glass. We describe here new experiments revealing that slip events in cohesive powders also produce electrical signals, and remarkably these signals can appear significantly in advance of slip events. We have confirmed this effect in two different experimental systems and using two common powdered materials, and in a third experiment we have demonstrated that similar voltage signals are produced by crack-like defects in several powdered materials.

PMID:
22689956
PMCID:
PMC3390852
DOI:
10.1073/pnas.1121596109
[PubMed - indexed for MEDLINE]
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