Constitutive Equations for Viscoelastic Composites with Growing
             Damage and their Application to a Particulate Composite
                               
                                   by
  
                            Richard Schapery               
      Department of Aerospace Engineering and Engineering Mechanics, 
                           University of Texas
 
 
                 INSCC 110, 3:30pm Monday, April 12, 1999



                                 Abstract
                        
Physically-based constitutive equations for a class of
viscoelastic composites with damage are reviewed and then 
applied to highly-filled rubber with distributed micro-cracking.  
The equations account for broad-spectrum viscoelastic behavior, 
multi-axial stresses, rate-dependent damage growth and
damage-induced anisotropy. Comparison of theory and experiment
is shown for bar specimens under controlled axial straining and 
confining pressure and for non-uniformly stressed plates.