Journal Published Online: 01 January 1983
Volume 11, Issue 1

A Summary of Fracture Mechanics Concepts



The basic concepts of fracture mechanics are presented in a logical sequence. Each concept is given in a concise definition-like paragraph. The concepts of toughness, process zone, crack, and linear-elastic fracture mechanics are first introduced. The crack-tip characterizations, that is, stress-intensity factor, crack extension force, J integral, and crack-tip opening displacement are then discussed. The constraints in plane stress, plane strain, and three dimensions are pointed out. Various methods of evaluating the crack-tip characterizations are explained. The concept of fracture toughness is presented in relation to resistance curves, dynamics, constraints, and fast-stable crack growth. Some practical empirical fracture toughness relations are given. Then slow-stable crack growth is discussed, that is, stress corrosion cracking, fatigue cracking, corrosion fatigue, and viscous (creep) cracking. The summary concludes with the concept of fracture control plans.

Author Information

Irwin, GR
University of Maryland, College Park, MD
de Wit, R
Fracture and Deformation Division, Center for Materials Science, National Measurement Laboratory, National Bureau of Standards, Washington, DC
Pages: 10
Price: $25.00
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Stock #: JTE11586J
ISSN: 0090-3973
DOI: 10.1520/JTE11586J