Physics Colloquium - Crackling Noise: From Nanopillars to Earthquakes

Event Date: 

Tuesday, November 4, 2014 - 4:00pm

Event Location: 

  • Broida 1640

Event Contact: 

Speaker:

Karin Dahmen, University of Illinois at Urbana-Champaign

Abstract:

The deformation of many solid and granular materials is not continuous, but discrete, with intermittent slips similar to earthquakes. We discuss a simple model and experiments that reflect interesting similarities between the slip statistics of slowly compressed nano-crystals, bulk metallic glasses, granular materials, and earthquakes.The model provides many new predictions for future experiments and simulations. The studies draw on methods from the theory of phase transitions, the renormalization group, and numerical simulations.Connections to other systems with avalanches are also discussed.