SYMPOSIA PAPER Published: 01 January 1990

Some Special Computations and Experiments on Surface Crack Growth


The new method of surface crack growth calculation under linear elastic fracture mechanics (LEFM) conditions facilitates the use of stress-intensity factor K (and in particular its ΔK range) as a tool to estimate the fatigue life of cracked plates under tensile loads. This is made possible by determining a set of parameters in order to obtain equal ΔK values and analogous crack propagation rates in two widely different specimen geometries, a plate and a standard compact type (C(T)) specimen. A comparison of fatigue lives with equivalent crack growth for both types of specimen suggests that in using the proposed procedure, the significance of ΔK values in a part-through crack is closely related to that of a through crack in a C(T) specimen.

In analyzing the surface crack growth under elastic-plastic conditions, it should be necessary to use J values in a different way than in LEFM. Appropriate references to both problems are quoted.

Author Information

Prodan, M
Fracture and Damage Mechanics, Sulzer Bros., Ltd., Winterthur, Switzerland
Radon, JC
Imperial College of Science and Technology, London, U.K.
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Developed by Committee: E08
Pages: 287–302
DOI: 10.1520/STP23439S
ISBN-EB: 978-0-8031-5121-5
ISBN-13: 978-0-8031-1284-1