Wednesday Informal Seminar Hour - Dr. Hamed Ghaffari (UT Arlington)

"New Perspective on Microscopic Laboratory Earthquakes" | Characterizing the fast evolution of microstructural defects - which result in emitting acoustic phonons- is key to understanding "crackling" phenomena during the deformation of brittle solid materials. For example, it has been proposed using atomistic simulations of crack propagation in elastic materials, that the formation of a nonlinear hyperelastic or plastic zone around moving crack tips controls crack velocity. To date, progress in understanding the physics of this critical zone has been limited due to the lack of data describing the complex physical processes that operate near microscopic crack tips.

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