Lecture
This lecture covers the analysis of crack growth in materials, focusing on stress intensity at the crack tip and the concept of the 'Resistance curve'. It discusses the toughening mechanisms, such as atomistic tractions and cohesive zones, and the energy dissipation during crack propagation. The presentation also includes the mechanics of fiber bridging and void nucleation in ductile failure, emphasizing the importance of cohesive-like behavior near the crack tip.