CENTER FOR COMPUTATIONAL MATHEMATICS COLLOQUIUM

                  UNIVERSITY OF COLORADO AT DENVER



TITLE:   Adaptive Multidomain Solution Techniques in 
         Three Dimensional Elasticity
 

SPEAKER: Patrick Le Tallec, INRIA-Rocquencourt, France
         (work joint with Marina Vidrascu and Rodolfo Araya)
         

DATE:    Thursday, August 21, 1997  (PLEASE NOTE UNUSUAL DAY!)


PLACE:   Math Lecture Room 656 
         UCD Building, 1250 14th St., Denver


TIME:    noon (Refreshments served at 11:45 am) 



ABSTRACT

Recent accidents have clearly demonstrated that
reliable a-posteriori error estimates and mesh
adaption techniques were imperatively needed when 
computing large scale structures.

The purpose of the talk is to describe several variants of
error estimates and nonconforming mesh refinements. The 
basic tools to be studied are on one hand the development 
of weighted residual estimates for heterogeneous elastic 
media discretised by second order elements, and on the other 
hand the definition of transition elements for solving 3D 
elasticity problems on nonconforming meshes.  The resulting 
algebraic system can then be solved by generalised 
Neumann-Neumann domain decomposition solvers.

The practical applications to be covered will be a 
complex shaped offshore platform structure and a more generic
reinforced heterogeneous beam type problem.