Smeared Crack Approach Models & Mesh Dependency

This lecture covers the concepts of smeared crack models, strain localization, and mesh dependency in structural analysis. It explains the hypotheses for crack simulation, variations of smeared crack models, and the problem of mesh-size dependency. The instructor discusses the constitutive models based on the smeared crack approach, emphasizing the response due to cracks with specific directions. The lecture also delves into the concept of crack-direction, fixed and rotating crack models, and stress-strain relationships on the crack plane. Additionally, it explores multi-directional loading, total strain models, and stress-strain relationships for tension-compression. The presentation concludes with insights on strain localization, mesh-directional dependency, and solutions to address numerical pathologies.