SEDL / STP / STP969-EB / STP33081S

Application of the J Concept to Fatigue Crack Growth in Large-Scale Yielding

Lambert, Y
Research engineers and professor, Université de Compiegne, Groupe Mécanique, Compiegne,

Saillard, P
Framatome, Centre de Calcul, Saint Marcel,

Bathias, C
Research engineers and professor, Université de Compiegne, Groupe Mécanique, Compiegne,

Pages: 12    Published: Jan 1988

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Abstract

Fatigue crack propagation tests were performed on compact tension specimens of AISI 316 steel, in the elastic-plastic and plastic regions. The parameter ΔJ was chosen to characterize propagation. Results show that there is a Paris law type correlation between propagation rate and ΔJ. An effect on propagation rate, which is attributed to the R = P^min/P^max ratio, has been noted.

A numerical verification of the applicability of the ΔJ concept was determined by use of a theoretical equation. These results were compared with experimental results.