Fracture Mechanics: Defects and Energy

This lecture covers the topic of fracture mechanics, focusing on geometrical defects and their influence on material fracture. The instructor explains the relationship between defects and fracture, introducing concepts such as stress intensity factor and energy release rate. The lecture delves into the analysis of crack propagation and the role of defects in making fracture easier. Various fracture modes, including tension and shear, are discussed, along with the stress distribution around cracks. The instructor also explores the theoretical aspects of material failure and the importance of geometry in determining fracture behavior.