This third edition encompasses theory and applications, linear and nonlinear fracture mechanics, solid mechanics, and materials science with a unified, balanced, and in-depth approach. This edition includes a chapter on environmental cracking, an exploration of weight functions, material on toughness test methods, problems at the end of the book to test assimilation, and coverage of fracture analysis procedures as well as information on fatigue crack closure. The book also contains detailed mathematical derivations in appendices at the end of applicable chapters and recent developments in laboratory testing, application to structures, and computational methods.