The scaling laws of stage II fatigue fracture

✍ Scribed by K. E. Puttick; A. G. Atkins

• Publisher: Springer Netherlands
• Year: 1993
• Tongue: English
• Weight: 201 KB
• Volume: 23
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00042817

✦ Synopsis

Fatigue crack propagation, at least in those stages which obey a form of Paris's law, must exhibit scale effects through its dependence on the stress intensity factor, ~nd it is of interest to evaluate these in relation to fatigue life and strength.

In general, for non-proportionally scaled bodies there are four separate scaling factors for height, width, thickness, and crack length [i], and each geometry has to be tackled separately, but the essential form of such size effects may be deduced from an analysis of geometrically scaled specimens. The relevant dimension in such a set is, we suggest, the characteristic length of the field of maximum principal tensile stress [2].