Isotropic Continuum Damage Models

This lecture covers the formulation and behavior of isotropic continuum damage models in quasi-brittle materials. It explains the concept of damage evolution, damage localization, and the relationship between stress and strain in damaged materials. The instructor discusses the uniaxial loading test, damage parameter interpretation, and the graphical representation of damage surfaces. The lecture also delves into the isotropic damage model's limitations and the need for orthotropic damage models to better represent material behavior under compression. References to seismic evaluation of concrete dams and behavior of concrete under compressive loadings are provided.