Accession Number : ADA333430

Title :   A Strain-Based Formulation for the Coupled Viscoelastic/Damage Behavior.

Descriptive Note : Technical rept. 1 Feb 97-30 Sep 98

Corporate Author : TENNESSEE UNIV KNOXVILLE DEPT OF MECHANICAL AND AEROSPACE ENGINEERING

Personal Author(s) : Abdel-Tawab, Khaled ; Weltsman, Y.J.

PDF Url : ADA333430

Report Date : 07 JUL 1997

Pagination or Media Count : 25

Abstract : A strain-based thermodynamics framework is proposed for modeling the continuum damage behavior of viscoelastic materials. Damage is represented by an internal state variable in the form of a symmetric second rank tensor. The effect of damage on the constitutive behavior is introduced through direct coupling between the damage variable and the viscoelastic internal state variables. This approach accounts for time-dependent damage as well as damage-induced changes in material symmetry. Also, damage evolution is modeled by employing the concept of damage surfaces.

Descriptors :   *COUPLING(INTERACTION), *THERMODYNAMICS, *VISCOELASTICITY, DAMAGE, TIME DEPENDENCE, MATERIALS, DAMAGE ASSESSMENT, INTERNAL, SYMMETRY, EVOLUTION(GENERAL), TENSORS, RANK ORDER STATISTICS.

Subject Categories : Couplers, Fasteners, and Joints
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE