--------------------------------------------------------------------
   COLLOQUIUM OF THE LABORATORY FOR COMPUTER DESIGN OF MATERIALS        
                   School of Computational Sciences	
                           (CSI 898-Sec 001) 
--------------------------------------------------------------------

             Multiscale Modeling of Dislocation Processes

                           Craig S. Hartley

         Air Force Office of Scientific Research, Arlington, VA 

The talk will consist of two parts: a technical part presenting
our own research, and an administrative part.

Technical part:
Connecting microscopic mechanisms of deformation to macroscopic behavior
requires an appropriate formalism that bridges the length scales of these
processes. We propose a simple constitutive relation relating dislocation
velocity to the net force that provides a formalism for the incorporation
of specific dislocation mechanisms into the description of global plastic
deformation. We then employ this approach to describe macroscopic
deformation behavior controlled by forest intersection. An activation
volume tensor and activation enthalpy for deformation now become functions
of the three-dimensional state of stress. Concepts presented in this work
provide a framework for future development of multi-scale computational
methods that bridge length scales in the description of plastic
deformation. 

Administrative part:
This part will cover materials research sponsorship by the Air Force Office
of Scientific Research, with particular emphasis on the Aerospace and
Materials Sciences Directorate. The role of AFOSR in sponsoring research at
Air Force laboratories, universities, and industries will be described. The
process by which a program manager solicits, evaluates, awards and manages
projects in the AFOSR environment will be discussed. Emerging opportunities
for materials research support will be included in the discussion.  

                        Monday , November 13, 2000
                                  4:30 pm
                        Room 206, Science & Tech. I

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