Author(s): Duda,Fernando Pereira ; Souza,Angela Cristina Cardoso de
Date: 2004
Origin: Oasisbr
Subject(s): continuum mechanics; damage mechanics; brittle materials; continuum mechanics; continuum mechanics; damage mechanics; damage mechanics; brittle materials; brittle materials
This paper deals with a finite strain continuum theory of elastic-brittle solids with microstructure. A single scalar microstructural field is introduced, meant to represent - even if in a summary way - the concentration of microdefects within the material. A system of microforces, dual to the microstructural field, is axiomatically introduced. The corresponding balance, augmented with suitable constitutive information, yields, inter alia, a kinetic equation for the microstructural field, criteria for damage nucleation, growth and healing as well as a failure criterion based on attainment of a critical value of the microstructural field. The theory is applied for the description of the Mullins effect.
