--------------------------------------------------------------------
     COLLOQUIUM OF THE COMPUTATIONAL MATERIALS SCIENCE CENTER
AND THE SCHOOL OF PHYSICS, ASTRONOMY, & COMPUTATIONAL SCIENCES
                            (CSI 898-Sec 001)
--------------------------------------------------------------------

Development of Failure Models for Materials Used in Aeronautical Structures

                         Cing-Dao (Steve) Kan

National Crash Analysis Center, School of Engineering and Applied Science
             George Washington University, Ashburn, VA

For aeronautical applications, it is important to understand the dynamic
failure behavior of structures subject to impact loadings in order to improve
their survivability.  Structures subjected to impact loading are affected by
large deformation, high strain-rate effect, temperature softening, and varying
state of stress, which may finally lead to material and structural failure.
It has also shown that impact characteristics are different with independent
factors, such as, impact velocity, material thickness, and shape and
orientation of the impacting object.  In this talk, a new generic
thermo-elastic/viscoplastic material model with regularized failure will be
presented.  The implementation of this material failure model into a nonlinear
explicit dynamic finite element code will be discussed.  The effectiveness of
this material failure model will be demonstrated by accurately predicting
ballistic limit and failure mode.  

                            November 5, 2012
                                 4:30 pm
                    Room 301, Research I, Fairfax Campus

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