--------------------------------------------------------------------
       COLLOQUIUM OF THE COMPUTATIONAL MATERIALS SCIENCE CENTER 
                   School of Computational Sciences
                           (CSI 898-Sec 001)
--------------------------------------------------------------------

            Computational Study of Localization of Plastic
                  Shear Events in Glassy Materials  
  
                              Qing Peng
    
            Department of Physics, University of Connecticut, and
             Carnegie Institution of Washington, Washington D. C. 
            

The length scale of the elementary processes of plastic relaxation of glassy
materials is still an open question. The computer simulation of plastic
deformation gives the details of the plastic shear events. To study the
localization of these events, a novel approach based on Delaunay
Tessellation and Fast Fourier Transforms techniques is invented. Using this
novel approach we have studied the localization of relative atomic strain in
discrete shear events during plastic deformation of glassy materials. The
strain in such shear events is highly localized in regions of atomic
dimensions. The implications of the novel approach and our simulation
results for a universal theory of plasticity of glassy materials will be
discussed.
                         
                           March 20, 4:30 pm
               Room 206, Science & Tech. I, Fairfax Campus

Refreshments will be served at 4:15 PM.
----------------------------------------------------------------------
Find the schedule at http://www.cmasc.gmu.edu/seminar/schedule.html
--------------------------------------------------------------------