Crack Propagation


Please sign in to view the rest of this entry.

Crack Propagation
Crack PropagationThe rate of crack growth is usually separated into two categories. One is those that propagate "slowly" [for example, 20 ft/s (6.1 m/s)], and only propagate on application of an external load. This is called stable crack growth. The other category is "fast" growth [for example, 3000 ft/s (915 m/s)], and these cracks can proceed without external loading if there is sufficient internal elastic stressing (such as residual stresses from heat treating). This is referred to as unstable crack growth. (The propagation of the fracture in a tensile sample after necking is also unstable crack growth.) The type of fracture that occurs depends on many factors, such as loading conditions, temperature, material, and geometry of …
Citation
Charlie R. Brooks; Ashok Choudhury: Failure Analysis of Engineering Materials. Crack Propagation, Chapter (McGraw-Hill Professional, 2002), AccessEngineering Export